Exception Constructors
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Initializes a new instance of the Exception class.
Exception() |
Initializes a new instance of the Exception class. |
Exception(String) |
Initializes a new instance of the Exception class with a specified error message. |
Exception(SerializationInfo, StreamingContext) |
Obsolete.
Initializes a new instance of the Exception class with serialized data. |
Exception(String, Exception) |
Initializes a new instance of the Exception class with a specified error message and a reference to the inner exception that is the cause of this exception. |
- Source:
- Exception.CoreCLR.cs
- Source:
- Exception.CoreCLR.cs
- Source:
- Exception.CoreCLR.cs
Initializes a new instance of the Exception class.
public:
Exception();
public Exception ();
Public Sub New ()
Examples
The following code example derives an Exception
that uses a predefined message. The code demonstrates the use of the parameterless constructor for the derived class and the base Exception
class.
// Example for the Exception( ) constructor.
using namespace System;
namespace NDP_UE_CPP
{
// Derive an exception with a predefined message.
public ref class NotEvenException: public Exception
{
public:
NotEvenException()
: Exception( "The argument to a function requiring "
"even input is not divisible by 2." )
{}
};
// Half throws a base exception if the input is not even.
int Half( int input )
{
if ( input % 2 != 0 )
throw gcnew Exception;
else
return input / 2;
}
// Half2 throws a derived exception if the input is not even.
int Half2( int input )
{
if ( input % 2 != 0 )
throw gcnew NotEvenException;
else
return input / 2;
}
// CalcHalf calls Half and catches any thrown exceptions.
void CalcHalf( int input )
{
try
{
int halfInput = Half( input );
Console::WriteLine( "Half of {0} is {1}.", input, halfInput );
}
catch ( Exception^ ex )
{
Console::WriteLine( ex->ToString() );
}
}
// CalcHalf2 calls Half2 and catches any thrown exceptions.
void CalcHalf2( int input )
{
try
{
int halfInput = Half2( input );
Console::WriteLine( "Half of {0} is {1}.", input, halfInput );
}
catch ( Exception^ ex )
{
Console::WriteLine( ex->ToString() );
}
}
}
int main()
{
Console::WriteLine( "This example of the Exception( ) constructor "
"generates the following output." );
Console::WriteLine( "\nHere, an exception is thrown using the \n"
"parameterless constructor of the base class.\n" );
NDP_UE_CPP::CalcHalf( 12 );
NDP_UE_CPP::CalcHalf( 15 );
Console::WriteLine( "\nHere, an exception is thrown using the \n"
"parameterless constructor of a derived class.\n" );
NDP_UE_CPP::CalcHalf2( 24 );
NDP_UE_CPP::CalcHalf2( 27 );
}
/*
This example of the Exception( ) constructor generates the following output.
Here, an exception is thrown using the
parameterless constructor of the base class.
Half of 12 is 6.
System.Exception: Exception of type System.Exception was thrown.
at NDP_UE_CPP.Half(Int32 input)
at NDP_UE_CPP.CalcHalf(Int32 input)
Here, an exception is thrown using the
parameterless constructor of a derived class.
Half of 24 is 12.
NDP_UE_CPP.NotEvenException: The argument to a function requiring even input is
not divisible by 2.
at NDP_UE_CPP.Half2(Int32 input)
at NDP_UE_CPP.CalcHalf2(Int32 input)
*/
// Example for the Exception( ) constructor.
using System;
namespace NDP_UE_CS
{
// Derive an exception with a predefined message.
class NotEvenException : Exception
{
public NotEvenException( ) :
base( "The argument to a function requiring " +
"even input is not divisible by 2." )
{ }
}
class NewExceptionDemo
{
public static void Main()
{
Console.WriteLine(
"This example of the Exception( ) constructor " +
"generates the following output." );
Console.WriteLine(
"\nHere, an exception is thrown using the \n" +
"parameterless constructor of the base class.\n" );
CalcHalf( 12 );
CalcHalf( 15 );
Console.WriteLine(
"\nHere, an exception is thrown using the \n" +
"parameterless constructor of a derived class.\n" );
CalcHalf2( 24 );
CalcHalf2( 27 );
}
// Half throws a base exception if the input is not even.
static int Half( int input )
{
if( input % 2 != 0 )
throw new Exception( );
else return input / 2;
}
// Half2 throws a derived exception if the input is not even.
static int Half2( int input )
{
if( input % 2 != 0 )
throw new NotEvenException( );
else return input / 2;
}
// CalcHalf calls Half and catches any thrown exceptions.
static void CalcHalf(int input )
{
try
{
int halfInput = Half( input );
Console.WriteLine(
"Half of {0} is {1}.", input, halfInput );
}
catch( Exception ex )
{
Console.WriteLine( ex.ToString( ) );
}
}
// CalcHalf2 calls Half2 and catches any thrown exceptions.
static void CalcHalf2(int input )
{
try
{
int halfInput = Half2( input );
Console.WriteLine(
"Half of {0} is {1}.", input, halfInput );
}
catch( Exception ex )
{
Console.WriteLine( ex.ToString( ) );
}
}
}
}
/*
This example of the Exception( ) constructor generates the following output.
Here, an exception is thrown using the
parameterless constructor of the base class.
Half of 12 is 6.
System.Exception: Exception of type System.Exception was thrown.
at NDP_UE_CS.NewExceptionDemo.Half(Int32 input)
at NDP_UE_CS.NewExceptionDemo.CalcHalf(Int32 input)
Here, an exception is thrown using the
parameterless constructor of a derived class.
Half of 24 is 12.
NDP_UE_CS.NotEvenException: The argument to a function requiring even input is
not divisible by 2.
at NDP_UE_CS.NewExceptionDemo.Half2(Int32 input)
at NDP_UE_CS.NewExceptionDemo.CalcHalf2(Int32 input)
*/
// Example for the Exception() constructor.
open System
// Derive an exception with a predefined message.
type NotEvenException() =
inherit Exception "The argument to a function requiring even input is not divisible by 2."
// half throws a base exception if the input is not even.
let half input =
if input % 2 <> 0 then
raise (Exception())
else input / 2
// half2 throws a derived exception if the input is not even.
let half2 input =
if input % 2 <> 0 then
raise (NotEvenException())
else input / 2
// calcHalf calls Half and catches any thrown exceptions.
let calcHalf input =
try
let halfInput = half input
printfn $"Half of {input} is {halfInput}."
with ex ->
printfn $"{ex}"
// calcHalf2 calls Half2 and catches any thrown exceptions.
let calcHalf2 input =
try
let halfInput = half2 input
printfn $"Half of {input} is {halfInput}."
with ex ->
printfn $"{ex}"
printfn "This example of the Exception() constructor generates the following output."
printfn "\nHere, an exception is thrown using the \nparameterless constructor of the base class.\n"
calcHalf 12
calcHalf 15
printfn "\nHere, an exception is thrown using the \nparameterless constructor of a derived class.\n"
calcHalf2 24
calcHalf2 27
// This example of the Exception() constructor generates the following output.
// Here, an exception is thrown using the
// parameterless constructor of the base class.
//
// Half of 12 is 6.
// System.Exception: Exception of type 'System.Exception' was thrown.
// at NDP_UE_FS.half(Int32 input)
// at at NDP_UE_FS.calcHalf(Int32 input)
//
// Here, an exception is thrown using the
// parameterless constructor of a derived class.
//
// Half of 24 is 12.
// NDP_UE_FS+NotEvenException: The argument to a function requiring even input is
// not divisible by 2.
// at NDP_UE_FS.half2(Int32 input)
// at NDP_UE_FS.calcHalf2(Int32 input)
' Example for the Exception( ) constructor.
Namespace NDP_UE_VB
' Derive an exception with a predefined message.
Class NotEvenException
Inherits Exception
Public Sub New( )
MyBase.New( _
"The argument to a function requiring " & _
"even input is not divisible by 2." )
End Sub
End Class
Module NewExceptionDemo
Sub Main( )
Console.WriteLine( _
"This example of the Exception( ) constructor " & _
"generates the following output." )
Console.WriteLine( vbCrLf & _
"Here, an exception is thrown using the " & vbCrLf & _
"parameterless constructor of the base class." & _
vbCrLf )
CalcHalf( 12 )
CalcHalf( 15 )
Console.WriteLine(vbCrLf & _
"Here, an exception is thrown using the " & vbCrLf & _
"parameterless constructor of a derived class." & _
vbCrLf )
CalcHalf2( 24 )
CalcHalf2( 27 )
End Sub
' Half throws a base exception if the input is not even.
Function Half( input As Integer ) As Integer
If input Mod 2 <> 0 Then
Throw New Exception( )
Else
Return input / 2
End If
End Function ' Half
' Half2 throws a derived exception if the input is not even.
Function Half2( input As Integer ) As Integer
If input Mod 2 <> 0 Then
Throw New NotEvenException( )
Else
Return input / 2
End If
End Function ' Half2
' CalcHalf calls Half and catches any thrown exceptions.
Sub CalcHalf( input As Integer )
Try
Dim halfInput As Integer = Half( input )
Console.WriteLine( _
"Half of {0} is {1}.", input, halfInput )
Catch ex As Exception
Console.WriteLine( ex.ToString( ) )
End Try
End Sub
' CalcHalf2 calls Half2 and catches any thrown exceptions.
Sub CalcHalf2( input As Integer )
Try
Dim halfInput As Integer = Half2( input )
Console.WriteLine( _
"Half of {0} is {1}.", input, halfInput )
Catch ex As Exception
Console.WriteLine( ex.ToString( ) )
End Try
End Sub
End Module ' NewExceptionDemo
End Namespace ' NDP_UE_VB
' This example of the Exception( ) constructor generates the following output.
'
' Here, an exception is thrown using the
' parameterless constructor of the base class.
'
' Half of 12 is 6.
' System.Exception: Exception of type System.Exception was thrown.
' at NDP_UE_VB.NewExceptionDemo.Half(Int32 input)
' at NDP_UE_VB.NewExceptionDemo.CalcHalf(Int32 input)
'
' Here, an exception is thrown using the
' parameterless constructor of a derived class.
'
' Half of 24 is 12.
' NDP_UE_VB.NotEvenException: The argument to a function requiring even input i
' s not divisible by 2.
' at NDP_UE_VB.NewExceptionDemo.Half2(Int32 input)
' at NDP_UE_VB.NewExceptionDemo.CalcHalf2(Int32 input)
Remarks
This constructor initializes the Message property of the new instance to a system-supplied message that describes the error and takes into account the current system culture.
All the derived classes should provide this parameterless constructor. The following table shows the initial property values for an instance of Exception.
Property | Value |
---|---|
InnerException | A null reference (Nothing in Visual Basic). |
Message | A system-supplied localized description. |
Applies to
.NET 9 och andra versioner
Produkt | Versioner |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
UWP | 10.0 |
- Source:
- Exception.cs
- Source:
- Exception.cs
- Source:
- Exception.cs
Initializes a new instance of the Exception class with a specified error message.
public:
Exception(System::String ^ message);
public Exception (string message);
public Exception (string? message);
new Exception : string -> Exception
Public Sub New (message As String)
Parameters
- message
- String
The message that describes the error.
Examples
The following code example derives an Exception
for a specific condition. The code demonstrates the use of the constructor that takes a caller-specified message as a parameter, for both the derived class and the base Exception
class.
// Example for the Exception( String* ) constructor.
using namespace System;
namespace NDP_UE_CPP
{
// Derive an exception with a specifiable message.
public ref class NotEvenException: public Exception
{
private:
static String^ notEvenMessage = "The argument to a function requiring "
"even input is not divisible by 2.";
public:
NotEvenException()
: Exception( notEvenMessage )
{}
NotEvenException( String^ auxMessage )
: Exception( String::Format( "{0} - {1}", auxMessage, notEvenMessage ) )
{}
};
// Half throws a base exception if the input is not even.
int Half( int input )
{
if ( input % 2 != 0 )
throw gcnew Exception( String::Format( "The argument {0} is not divisible by 2.", input ) );
else
return input / 2;
}
// Half2 throws a derived exception if the input is not even.
int Half2( int input )
{
if ( input % 2 != 0 )
throw gcnew NotEvenException( String::Format( "Invalid argument: {0}", input ) );
else
return input / 2;
}
// CalcHalf calls Half and catches any thrown exceptions.
void CalcHalf( int input )
{
try
{
int halfInput = Half( input );
Console::WriteLine( "Half of {0} is {1}.", input, halfInput );
}
catch ( Exception^ ex )
{
Console::WriteLine( ex->ToString() );
}
}
// CalcHalf2 calls Half2 and catches any thrown exceptions.
void CalcHalf2( int input )
{
try
{
int halfInput = Half2( input );
Console::WriteLine( "Half of {0} is {1}.", input, halfInput );
}
catch ( Exception^ ex )
{
Console::WriteLine( ex->ToString() );
}
}
}
int main()
{
Console::WriteLine( "This example of the Exception( String* )\n"
"constructor generates the following output." );
Console::WriteLine( "\nHere, an exception is thrown using the \n"
"constructor of the base class.\n" );
NDP_UE_CPP::CalcHalf( 18 );
NDP_UE_CPP::CalcHalf( 21 );
Console::WriteLine( "\nHere, an exception is thrown using the \n"
"constructor of a derived class.\n" );
NDP_UE_CPP::CalcHalf2( 30 );
NDP_UE_CPP::CalcHalf2( 33 );
}
/*
This example of the Exception( String* )
constructor generates the following output.
Here, an exception is thrown using the
constructor of the base class.
Half of 18 is 9.
System.Exception: The argument 21 is not divisible by 2.
at NDP_UE_CPP.Half(Int32 input)
at NDP_UE_CPP.CalcHalf(Int32 input)
Here, an exception is thrown using the
constructor of a derived class.
Half of 30 is 15.
NDP_UE_CPP.NotEvenException: Invalid argument: 33 - The argument to a function
requiring even input is not divisible by 2.
at NDP_UE_CPP.Half2(Int32 input)
at NDP_UE_CPP.CalcHalf2(Int32 input)
*/
// Example for the Exception( string ) constructor.
using System;
namespace NDP_UE_CS2
{
// Derive an exception with a specifiable message.
class NotEvenException : Exception
{
const string notEvenMessage =
"The argument to a function requiring " +
"even input is not divisible by 2.";
public NotEvenException( ) :
base( notEvenMessage )
{ }
public NotEvenException( string auxMessage ) :
base( String.Format( "{0} - {1}",
auxMessage, notEvenMessage ) )
{ }
}
class NewSExceptionDemo
{
public static void Main()
{
Console.WriteLine(
"This example of the Exception( string )\n" +
"constructor generates the following output." );
Console.WriteLine(
"\nHere, an exception is thrown using the \n" +
"constructor of the base class.\n" );
CalcHalf( 18 );
CalcHalf( 21 );
Console.WriteLine(
"\nHere, an exception is thrown using the \n" +
"constructor of a derived class.\n" );
CalcHalf2( 30 );
CalcHalf2( 33 );
}
// Half throws a base exception if the input is not even.
static int Half( int input )
{
if( input % 2 != 0 )
throw new Exception( String.Format(
"The argument {0} is not divisible by 2.",
input ) );
else return input / 2;
}
// Half2 throws a derived exception if the input is not even.
static int Half2( int input )
{
if( input % 2 != 0 )
throw new NotEvenException(
String.Format( "Invalid argument: {0}", input ) );
else return input / 2;
}
// CalcHalf calls Half and catches any thrown exceptions.
static void CalcHalf(int input )
{
try
{
int halfInput = Half( input );
Console.WriteLine(
"Half of {0} is {1}.", input, halfInput );
}
catch( Exception ex )
{
Console.WriteLine( ex.ToString( ) );
}
}
// CalcHalf2 calls Half2 and catches any thrown exceptions.
static void CalcHalf2(int input )
{
try
{
int halfInput = Half2( input );
Console.WriteLine(
"Half of {0} is {1}.", input, halfInput );
}
catch( Exception ex )
{
Console.WriteLine( ex.ToString( ) );
}
}
}
}
/*
This example of the Exception( string )
constructor generates the following output.
Here, an exception is thrown using the
constructor of the base class.
Half of 18 is 9.
System.Exception: The argument 21 is not divisible by 2.
at NDP_UE_CS.NewSExceptionDemo.Half(Int32 input)
at NDP_UE_CS.NewSExceptionDemo.CalcHalf(Int32 input)
Here, an exception is thrown using the
constructor of a derived class.
Half of 30 is 15.
NDP_UE_CS.NotEvenException: Invalid argument: 33 - The argument to a function r
equiring even input is not divisible by 2.
at NDP_UE_CS.NewSExceptionDemo.Half2(Int32 input)
at NDP_UE_CS.NewSExceptionDemo.CalcHalf2(Int32 input)
*/
// Example for the Exception(string) constructor.
open System
let notEvenMessage = "The argument to a function requiring even input is not divisible by 2."
// Derive an exception with a specifiable message.
type NotEvenException =
inherit Exception
new () = { inherit Exception(notEvenMessage) }
new (auxMessage) = { inherit Exception($"{auxMessage} - {notEvenMessage}") }
// half throws a base exception if the input is not even.
let half input =
if input % 2 <> 0 then
raise (Exception $"The argument {input} is not divisible by 2.")
else input / 2
// half2 throws a derived exception if the input is not even.
let half2 input =
if input % 2 <> 0 then
raise (NotEvenException $"Invalid argument: {input}")
else input / 2
// calcHalf calls Half and catches any thrown exceptions.
let calcHalf input =
try
let halfInput = half input
printfn $"Half of {input} is {halfInput}."
with ex ->
printfn $"{ex}"
// calcHalf2 calls Half2 and catches any thrown exceptions.
let calcHalf2 input =
try
let halfInput = half2 input
printfn $"Half of {input} is {halfInput}."
with ex ->
printfn $"{ex}"
printfn "This example of the Exception(string)\nconstructor generates the following output."
printfn "\nHere, an exception is thrown using the \nconstructor of the base class.\n"
calcHalf 18
calcHalf 21
printfn "\nHere, an exception is thrown using the \nconstructor of a derived class.\n"
calcHalf2 30
calcHalf2 33
// This example of the Exception(string)
// constructor generates the following output.
//
// Here, an exception is thrown using the
// constructor of the base class.
//
// Half of 18 is 9.
// System.Exception: The argument 21 is not divisible by 2.
// at NDP_UE_FS_2.half(Int32 input)
// at NDP_UE_FS_2.calcHalf(Int32 input)
//
// Here, an exception is thrown using the
// constructor of a derived class.
//
// Half of 30 is 15.
// NDP_UE_FS_2+NotEvenException: Invalid argument: 33 - The argument to a function r
// equiring even input is not divisible by 2.
// at NDP_UE_FS_2.half2(Int32 input)
// at NDP_UE_FS_2.calcHalf2(Int32 input)
' Example for the Exception( String ) constructor( String ).
Namespace NDP_UE_VB
' Derive an exception with a specifiable message.
Class NotEvenException
Inherits Exception
Private Const notEvenMessage As String = _
"The argument to a function requiring " & _
"even input is not divisible by 2."
Public Sub New()
MyBase.New(notEvenMessage)
End Sub
Public Sub New(auxMessage As String)
MyBase.New(String.Format("{0} - {1}", _
auxMessage, notEvenMessage))
End Sub
End Class
Module NewSExceptionDemo
Sub Main()
Console.WriteLine( _
"This example of the Exception( String )" & vbCrLf & _
"constructor generates the following output." )
Console.WriteLine( vbCrLf & _
"Here, an exception is thrown using the " & vbCrLf & _
"constructor of the base class." & vbCrLf )
CalcHalf(18)
CalcHalf(21)
Console.WriteLine(vbCrLf & _
"Here, an exception is thrown using the " & vbCrLf & _
"constructor of a derived class." & vbCrLf )
CalcHalf2(30)
CalcHalf2(33)
End Sub
' Half throws a base exception if the input is not even.
Function Half(input As Integer) As Integer
If input Mod 2 <> 0 Then
Throw New Exception( String.Format( _
"The argument {0} is not divisible by 2.", _
input ) )
Else
Return input / 2
End If
End Function ' Half
' Half2 throws a derived exception if the input is not even.
Function Half2(input As Integer) As Integer
If input Mod 2 <> 0 Then
Throw New NotEvenException( _
String.Format( "Invalid argument: {0}", input ) )
Else
Return input / 2
End If
End Function ' Half2
' CalcHalf calls Half and catches any thrown exceptions.
Sub CalcHalf(input As Integer)
Try
Dim halfInput As Integer = Half(input)
Console.WriteLine( _
"Half of {0} is {1}.", input, halfInput )
Catch ex As Exception
Console.WriteLine( ex.ToString( ) )
End Try
End Sub
' CalcHalf2 calls Half2 and catches any thrown exceptions.
Sub CalcHalf2( input As Integer )
Try
Dim halfInput As Integer = Half2( input )
Console.WriteLine( _
"Half of {0} is {1}.", input, halfInput )
Catch ex As Exception
Console.WriteLine( ex.ToString( ) )
End Try
End Sub
End Module ' NewSExceptionDemo
End Namespace ' NDP_UE_VB
' This example of the Exception( String )
' constructor generates the following output.
'
' Here, an exception is thrown using the
' constructor of the base class.
'
' Half of 18 is 9.
' System.Exception: The argument 21 is not divisible by 2.
' at NDP_UE_VB.NewSExceptionDemo.Half(Int32 input)
' at NDP_UE_VB.NewSExceptionDemo.CalcHalf(Int32 input)
'
' Here, an exception is thrown using the
' constructor of a derived class.
'
' Half of 30 is 15.
' NDP_UE_VB.NotEvenException: Invalid argument: 33 - The argument to a function
' requiring even input is not divisible by 2.
' at NDP_UE_VB.NewSExceptionDemo.Half2(Int32 input)
' at NDP_UE_VB.NewSExceptionDemo.CalcHalf2(Int32 input)
Remarks
This constructor initializes the Message property of the new instance by using the message
parameter. If the message
parameter is null
, this is the same as calling the Exception constructor.
The following table shows the initial property values for an instance of Exception.
Property | Value |
---|---|
InnerException | A null reference (Nothing in Visual Basic). |
Message | The error message string. |
Applies to
.NET 9 och andra versioner
Produkt | Versioner |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
UWP | 10.0 |
- Source:
- Exception.CoreCLR.cs
- Source:
- Exception.CoreCLR.cs
- Source:
- Exception.CoreCLR.cs
Caution
This API supports obsolete formatter-based serialization. It should not be called or extended by application code.
Initializes a new instance of the Exception class with serialized data.
protected:
Exception(System::Runtime::Serialization::SerializationInfo ^ info, System::Runtime::Serialization::StreamingContext context);
protected Exception (System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);
[System.Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId="SYSLIB0051", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
protected Exception (System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);
new Exception : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> Exception
[<System.Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId="SYSLIB0051", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
new Exception : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> Exception
Protected Sub New (info As SerializationInfo, context As StreamingContext)
Parameters
- info
- SerializationInfo
The SerializationInfo that holds the serialized object data about the exception being thrown.
- context
- StreamingContext
The StreamingContext that contains contextual information about the source or destination.
- Attributes
Exceptions
info
is null
.
The class name is null
or HResult is zero (0).
Examples
The following code example defines a derived serializable Exception
class. The code forces a divide-by-0 error and then creates an instance of the derived exception using the (SerializationInfo, StreamingContext) constructor. The code serializes the instance to a file, deserializes the file into a new exception, which it throws, and then catches and displays the exception's data.
#using <System.Runtime.Serialization.Formatters.Soap.dll>
using namespace System;
using namespace System::IO;
using namespace System::Runtime::Serialization;
using namespace System::Runtime::Serialization::Formatters::Soap;
// Define a serializable derived exception class.
[Serializable]
ref class SecondLevelException: public Exception, public ISerializable
{
public:
// This public constructor is used by class instantiators.
SecondLevelException( String^ message, Exception^ inner )
: Exception( message, inner )
{
HelpLink = "http://MSDN.Microsoft.com";
Source = "Exception_Class_Samples";
}
protected:
// This protected constructor is used for deserialization.
SecondLevelException( SerializationInfo^ info, StreamingContext context )
: Exception( info, context )
{}
public:
// GetObjectData performs a custom serialization.
[System::Security::Permissions::SecurityPermissionAttribute
(System::Security::Permissions::SecurityAction::LinkDemand,
Flags=System::Security::Permissions::SecurityPermissionFlag::SerializationFormatter)]
virtual void GetObjectData( SerializationInfo^ info, StreamingContext context ) override
{
// Change the case of two properties, and then use the
// method of the base class.
HelpLink = HelpLink->ToLower();
Source = Source->ToUpperInvariant();
Exception::GetObjectData( info, context );
}
};
int main()
{
Console::WriteLine( "This example of the Exception constructor "
"and Exception.GetObjectData\nwith Serialization"
"Info and StreamingContext parameters "
"generates \nthe following output.\n" );
try
{
// This code forces a division by 0 and catches the
// resulting exception.
try
{
int zero = 0;
int ecks = 1 / zero;
}
catch ( Exception^ ex )
{
// Create a new exception to throw again.
SecondLevelException^ newExcept = gcnew SecondLevelException( "Forced a division by 0 and threw "
"another exception.",ex );
Console::WriteLine( "Forced a division by 0, caught the "
"resulting exception, \n"
"and created a derived exception:\n" );
Console::WriteLine( "HelpLink: {0}", newExcept->HelpLink );
Console::WriteLine( "Source: {0}", newExcept->Source );
// This FileStream is used for the serialization.
FileStream^ stream = gcnew FileStream( "NewException.dat",FileMode::Create );
try
{
// Serialize the derived exception.
SoapFormatter^ formatter = gcnew SoapFormatter( nullptr,StreamingContext(StreamingContextStates::File) );
formatter->Serialize( stream, newExcept );
// Rewind the stream and deserialize the
// exception.
stream->Position = 0;
SecondLevelException^ deserExcept = dynamic_cast<SecondLevelException^>(formatter->Deserialize( stream ));
Console::WriteLine( "\nSerialized the exception, and then "
"deserialized the resulting stream "
"into a \nnew exception. "
"The deserialization changed the case "
"of certain properties:\n" );
// Throw the deserialized exception again.
throw deserExcept;
}
catch ( SerializationException^ se )
{
Console::WriteLine( "Failed to serialize: {0}", se->ToString() );
}
finally
{
stream->Close();
}
}
}
catch ( Exception^ ex )
{
Console::WriteLine( "HelpLink: {0}", ex->HelpLink );
Console::WriteLine( "Source: {0}", ex->Source );
Console::WriteLine();
Console::WriteLine( ex->ToString() );
}
}
/*
This example of the Exception constructor and Exception.GetObjectData
with SerializationInfo and StreamingContext parameters generates
the following output.
Forced a division by 0, caught the resulting exception,
and created a derived exception:
HelpLink: http://MSDN.Microsoft.com
Source: Exception_Class_Samples
Serialized the exception, and then deserialized the resulting stream into a
new exception. The deserialization changed the case of certain properties:
HelpLink: http://msdn.microsoft.com
Source: EXCEPTION_CLASS_SAMPLES
SecondLevelException: Forced a division by 0 and threw another exception. ---> S
ystem.DivideByZeroException: Attempted to divide by zero.
at main()
--- End of inner exception stack trace ---
at main()
*/
using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Soap;
// Define a serializable derived exception class.
[Serializable]
class SecondLevelException : Exception, ISerializable
{
// This public constructor is used by class instantiators.
public SecondLevelException(string message, Exception inner) :
base(message, inner)
{
HelpLink = "http://MSDN.Microsoft.com";
Source = "Exception_Class_Samples";
}
// This protected constructor is used for deserialization.
protected SecondLevelException(SerializationInfo info,
StreamingContext context) :
base(info, context)
{ }
// GetObjectData performs a custom serialization.
public override void GetObjectData(SerializationInfo info,
StreamingContext context)
{
// Change the case of two properties, and then use the
// method of the base class.
HelpLink = HelpLink.ToLower();
Source = Source.ToUpperInvariant();
base.GetObjectData(info, context);
}
}
class SerializationDemo
{
public static void Main()
{
Console.WriteLine(
"This example of the Exception constructor " +
"and Exception.GetObjectData\nwith Serialization" +
"Info and StreamingContext parameters " +
"generates \nthe following output.\n");
try
{
// This code forces a division by 0 and catches the
// resulting exception.
try
{
int zero = 0;
int ecks = 1 / zero;
}
catch (Exception ex)
{
// Create a new exception to throw again.
SecondLevelException newExcept =
new SecondLevelException(
"Forced a division by 0 and threw " +
"another exception.", ex);
Console.WriteLine(
"Forced a division by 0, caught the " +
"resulting exception, \n" +
"and created a derived exception:\n");
Console.WriteLine("HelpLink: {0}",
newExcept.HelpLink);
Console.WriteLine("Source: {0}",
newExcept.Source);
// This FileStream is used for the serialization.
FileStream stream =
new FileStream("NewException.dat",
FileMode.Create);
try
{
// Serialize the derived exception.
SoapFormatter formatter =
new SoapFormatter(null,
new StreamingContext(
StreamingContextStates.File));
formatter.Serialize(stream, newExcept);
// Rewind the stream and deserialize the
// exception.
stream.Position = 0;
SecondLevelException deserExcept =
(SecondLevelException)
formatter.Deserialize(stream);
Console.WriteLine(
"\nSerialized the exception, and then " +
"deserialized the resulting stream " +
"into a \nnew exception. " +
"The deserialization changed the case " +
"of certain properties:\n");
// Throw the deserialized exception again.
throw deserExcept;
}
catch (SerializationException se)
{
Console.WriteLine("Failed to serialize: {0}",
se.ToString());
}
finally
{
stream.Close();
}
}
}
catch (Exception ex)
{
Console.WriteLine("HelpLink: {0}", ex.HelpLink);
Console.WriteLine("Source: {0}", ex.Source);
Console.WriteLine();
Console.WriteLine(ex.ToString());
}
}
}
/*
This example displays the following output.
Forced a division by 0, caught the resulting exception,
and created a derived exception:
HelpLink: http://MSDN.Microsoft.com
Source: Exception_Class_Samples
Serialized the exception, and then deserialized the resulting stream into a
new exception. The deserialization changed the case of certain properties:
HelpLink: http://msdn.microsoft.com
Source: EXCEPTION_CLASS_SAMPLES
NDP_UE_CS.SecondLevelException: Forced a division by 0 and threw another except
ion. ---> System.DivideByZeroException: Attempted to divide by zero.
at NDP_UE_CS.SerializationDemo.Main()
--- End of inner exception stack trace ---
at NDP_UE_CS.SerializationDemo.Main()
*/
open System
open System.IO
open System.Runtime.Serialization
open System.Runtime.Serialization.Formatters.Soap
open System.Security.Permissions
// Define a serializable derived exception class.
[<Serializable>]
type SecondLevelException =
inherit Exception
interface ISerializable with
// GetObjectData performs a custom serialization.
member this.GetObjectData(info: SerializationInfo, context: StreamingContext) =
// Change the case of two properties, and then use the
// method of the base class.
this.HelpLink <- this.HelpLink.ToLower()
this.Source <- this.Source.ToUpperInvariant()
base.GetObjectData( info, context )
// This public constructor is used by class instantiators.
new (message: string, inner: Exception) as this =
{ inherit Exception(message, inner) }
then
this.HelpLink <- "http://MSDN.Microsoft.com"
this.Source <- "Exception_Class_Samples"
// This protected constructor is used for deserialization.
new (info: SerializationInfo, context: StreamingContext) =
{ inherit Exception(info, context) }
printfn
"""This example of the Exception constructor and Exception.GetObjectData
with SerializationInfo and StreamingContext parameters generates
the following output.
"""
try
// This code forces a division by 0 and catches the
// resulting exception.
try
let zero = 0
let ecks = 1 / zero
()
with ex ->
// Create a new exception to throw again.
let newExcept = SecondLevelException("Forced a division by 0 and threw another exception.", ex)
printfn "Forced a division by 0, caught the resulting exception, \nand created a derived exception:\n"
printfn $"HelpLink: {newExcept.HelpLink}"
printfn $"Source: {newExcept.Source}"
// This FileStream is used for the serialization.
use stream = new FileStream("NewException.dat", FileMode.Create)
try
// Serialize the derived exception.
let formatter = SoapFormatter(null, StreamingContext StreamingContextStates.File)
formatter.Serialize(stream, newExcept)
// Rewind the stream and deserialize the
// exception.
stream.Position <- 0L
let deserExcept = formatter.Deserialize stream :?> SecondLevelException
printfn
"""
Serialized the exception, and then deserialized the resulting stream into a
new exception. The deserialization changed the case of certain properties:
"""
// Throw the deserialized exception again.
raise deserExcept
with :? SerializationException as se ->
printfn $"Failed to serialize: {se}"
with ex ->
printfn $"HelpLink: {ex.HelpLink}"
printfn $"Source: {ex.Source}"
printfn $"\n{ex}"
// This example displays the following output.
// Forced a division by 0, caught the resulting exception,
// and created a derived exception:
//
// HelpLink: http://MSDN.Microsoft.com
// Source: Exception_Class_Samples
//
// Serialized the exception, and then deserialized the resulting stream into a
// new exception. The deserialization changed the case of certain properties:
//
// HelpLink: http://msdn.microsoft.com
// Source: EXCEPTION_CLASS_SAMPLES
//
// NDP_UE_FS_3+SecondLevelException: Forced a division by 0 and threw another except
// ion. ---> System.DivideByZeroException: Attempted to divide by zero.
// at <StartupCode$fs>.$NDP_UE_FS_3.main@()
// --- End of inner exception stack trace ---
// at <StartupCode$fs>.$NDP_UE_FS_3.main@()
' If compiling with the Visual Basic compiler (vbc.exe) from the command
' prompt, be sure to add the following switch:
' /reference:System.Runtime.Serialization.Formatters.Soap.dll
Imports System.IO
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters.Soap
Imports System.Security.Permissions
' Define a serializable derived exception class.
<Serializable()> _
Class SecondLevelException
Inherits Exception
' This public constructor is used by class instantiators.
Public Sub New( message As String, inner As Exception )
MyBase.New( message, inner )
HelpLink = "http://MSDN.Microsoft.com"
Source = "Exception_Class_Samples"
End Sub
' This protected constructor is used for deserialization.
Protected Sub New( info As SerializationInfo, _
context As StreamingContext )
MyBase.New( info, context )
End Sub
' GetObjectData performs a custom serialization.
<SecurityPermissionAttribute(SecurityAction.Demand, _
SerializationFormatter:=True)> _
Overrides Sub GetObjectData( info As SerializationInfo, _
context As StreamingContext)
' Change the case of two properties, and then use the
' method of the base class.
HelpLink = HelpLink.ToLower()
Source = Source.ToUpperInvariant()
MyBase.GetObjectData(info, context)
End Sub
End Class
Module SerializationDemo
Sub Main()
Console.WriteLine( _
"This example of the Exception constructor " & _
"and Exception.GetObjectData " & vbCrLf & _
"with SerializationInfo and StreamingContext " & _
"parameters generates " & vbCrLf & _
"the following output." & vbCrLf )
' This code forces a division by 0 and catches the
' resulting exception.
Try
Try
Dim zero As Integer = 0
Dim ecks As Integer = 1 \ zero
' Create a new exception to throw again.
Catch ex As Exception
Dim newExcept As New SecondLevelException( _
"Forced a division by 0 and threw " & _
"another exception.", ex )
Console.WriteLine( _
"Forced a division by 0, caught the " & _
"resulting exception, " & vbCrLf & _
"and created a derived exception:" & vbCrLf )
Console.WriteLine( "HelpLink: {0}", _
newExcept.HelpLink )
Console.WriteLine( "Source: {0}", _
newExcept.Source )
' This FileStream is used for the serialization.
Dim stream As New FileStream( _
"NewException.dat", FileMode.Create )
' Serialize the derived exception.
Try
Dim formatter As New SoapFormatter( Nothing, _
New StreamingContext( _
StreamingContextStates.File ) )
formatter.Serialize( stream, newExcept )
' Rewind the stream and deserialize the
' exception.
stream.Position = 0
Dim deserExcept As SecondLevelException = _
CType( formatter.Deserialize( stream ), _
SecondLevelException )
Console.WriteLine( vbCrLf & _
"Serialized the exception, and then " & _
"deserialized the resulting stream " & _
"into a " & vbCrLf & "new exception. " & _
"The deserialization changed the case " & _
"of certain properties:" & vbCrLf )
' Throw the deserialized exception again.
Throw deserExcept
Catch se As SerializationException
Console.WriteLine( "Failed to serialize: {0}", _
se.ToString( ) )
Finally
stream.Close( )
End Try
End Try
Catch ex As Exception
Console.WriteLine( "HelpLink: {0}", ex.HelpLink )
Console.WriteLine( "Source: {0}", ex.Source )
Console.WriteLine( )
Console.WriteLine( ex.ToString( ) )
End Try
End Sub
End Module
' This example displays the following output:
'
' Forced a division by 0, caught the resulting exception,
' and created a derived exception:
'
' HelpLink: http://MSDN.Microsoft.com
' Source: Exception_Class_Samples
'
' Serialized the exception, and then deserialized the resulting stream into a
' new exception. The deserialization changed the case of certain properties:
'
' HelpLink: http://msdn.microsoft.com
' Source: EXCEPTION_CLASS_SAMPLES
'
' NDP_UE_VB.SecondLevelException: Forced a division by 0 and threw another exce
' ption. ---> System.DivideByZeroException: Attempted to divide by zero.
' at NDP_UE_VB.SerializationDemo.Main()
' --- End of inner exception stack trace ---
' at NDP_UE_VB.SerializationDemo.Main()
Remarks
This constructor is called during deserialization to reconstitute the exception object transmitted over a stream. For more information, see XML and SOAP Serialization.
See also
Applies to
.NET 9 och andra versioner
Produkt | Versioner (Föråldrad) |
---|---|
.NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7 (8, 9) |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 2.0, 2.1 |
- Source:
- Exception.cs
- Source:
- Exception.cs
- Source:
- Exception.cs
Initializes a new instance of the Exception class with a specified error message and a reference to the inner exception that is the cause of this exception.
public:
Exception(System::String ^ message, Exception ^ innerException);
public Exception (string message, Exception innerException);
public Exception (string? message, Exception? innerException);
new Exception : string * Exception -> Exception
Public Sub New (message As String, innerException As Exception)
Parameters
- message
- String
The error message that explains the reason for the exception.
- innerException
- Exception
The exception that is the cause of the current exception, or a null reference (Nothing
in Visual Basic) if no inner exception is specified.
Examples
The following code example derives an Exception
for a specific condition. The code demonstrates the use of the constructor that takes a message and an inner exception as parameters, for both the derived class and the base Exception
class.
// Example for the Exception( String*, Exception* ) constructor.
using namespace System;
namespace NDP_UE_CPP
{
// Derive an exception with a specifiable message and inner exception.
public ref class LogTableOverflowException: public Exception
{
private:
static String^ overflowMessage = "The log table has overflowed.";
public:
LogTableOverflowException()
: Exception( overflowMessage )
{}
LogTableOverflowException( String^ auxMessage )
: Exception( String::Format( "{0} - {1}", overflowMessage, auxMessage ) )
{}
LogTableOverflowException( String^ auxMessage, Exception^ inner )
: Exception( String::Format( "{0} - {1}", overflowMessage, auxMessage ), inner )
{}
};
public ref class LogTable
{
public:
LogTable( int numElements )
{
logArea = gcnew array<String^>(numElements);
elemInUse = 0;
}
protected:
array<String^>^logArea;
int elemInUse;
public:
// The AddRecord method throws a derived exception
// if the array bounds exception is caught.
int AddRecord( String^ newRecord )
{
try
{
logArea[ elemInUse ] = newRecord;
return elemInUse++;
}
catch ( Exception^ ex )
{
throw gcnew LogTableOverflowException( String::Format( "Record \"{0}\" was not logged.", newRecord ),ex );
}
}
};
// Create a log table and force an overflow.
void ForceOverflow()
{
LogTable^ log = gcnew LogTable( 4 );
try
{
for ( int count = 1; ; count++ )
{
log->AddRecord( String::Format( "Log record number {0}", count ) );
}
}
catch ( Exception^ ex )
{
Console::WriteLine( ex->ToString() );
}
}
}
int main()
{
Console::WriteLine( "This example of the Exception( String*, Exception* )\n"
"constructor generates the following output." );
Console::WriteLine( "\nExample of a derived exception "
"that references an inner exception:\n" );
NDP_UE_CPP::ForceOverflow();
}
/*
This example of the Exception( String*, Exception* )
constructor generates the following output.
Example of a derived exception that references an inner exception:
NDP_UE_CPP.LogTableOverflowException: The log table has overflowed. - Record "L
og record number 5" was not logged. ---> System.IndexOutOfRangeException: Index
was outside the bounds of the array.
at NDP_UE_CPP.LogTable.AddRecord(String newRecord)
--- End of inner exception stack trace ---
at NDP_UE_CPP.LogTable.AddRecord(String newRecord)
at NDP_UE_CPP.ForceOverflow()
*/
// Example for the Exception( string, Exception ) constructor.
using System;
namespace NDP_UE_CS
{
// Derive an exception with a specifiable message and inner exception.
class LogTableOverflowException : Exception
{
const string overflowMessage =
"The log table has overflowed.";
public LogTableOverflowException( ) :
base( overflowMessage )
{ }
public LogTableOverflowException( string auxMessage ) :
base( String.Format( "{0} - {1}",
overflowMessage, auxMessage ) )
{ }
public LogTableOverflowException(
string auxMessage, Exception inner ) :
base( String.Format( "{0} - {1}",
overflowMessage, auxMessage ), inner )
{ }
}
class LogTable
{
public LogTable( int numElements )
{
logArea = new string[ numElements ];
elemInUse = 0;
}
protected string[ ] logArea;
protected int elemInUse;
// The AddRecord method throws a derived exception
// if the array bounds exception is caught.
public int AddRecord( string newRecord )
{
try
{
logArea[ elemInUse ] = newRecord;
return elemInUse++;
}
catch( Exception ex )
{
throw new LogTableOverflowException(
String.Format( "Record \"{0}\" was not logged.",
newRecord ), ex );
}
}
}
class OverflowDemo
{
// Create a log table and force an overflow.
public static void Main()
{
LogTable log = new LogTable( 4 );
Console.WriteLine(
"This example of the Exception( string, Exception )" +
"\nconstructor generates the following output." );
Console.WriteLine(
"\nExample of a derived exception " +
"that references an inner exception:\n" );
try
{
for( int count = 1; ; count++ )
{
log.AddRecord(
String.Format(
"Log record number {0}", count ) );
}
}
catch( Exception ex )
{
Console.WriteLine( ex.ToString( ) );
}
}
}
}
/*
This example of the Exception( string, Exception )
constructor generates the following output.
Example of a derived exception that references an inner exception:
NDP_UE_CS.LogTableOverflowException: The log table has overflowed. - Record "Lo
g record number 5" was not logged. ---> System.IndexOutOfRangeException: Index
was outside the bounds of the array.
at NDP_UE_CS.LogTable.AddRecord(String newRecord)
--- End of inner exception stack trace ---
at NDP_UE_CS.LogTable.AddRecord(String newRecord)
at NDP_UE_CS.OverflowDemo.Main()
*/
// Example for the Exception(string, Exception) constructor.
open System
let overflowMessage = "The log table has overflowed."
// Derive an exception with a specifiable message and inner exception.
type LogTableOverflowException =
inherit Exception
new () = { inherit Exception(overflowMessage) }
new (auxMessage: string) =
{ inherit Exception($"{overflowMessage} - {auxMessage}") }
new (auxMessage: string, inner: Exception) =
{ inherit Exception($"{overflowMessage} - {auxMessage}", inner ) }
type LogTable(numElements: int) =
let mutable logArea = Array.zeroCreate<string> numElements
let mutable elemInUse = 0
// The AddRecord method throws a derived exception
// if the array bounds exception is caught.
member _.AddRecord(newRecord: string): int =
try
logArea[elemInUse] <- newRecord
elemInUse <- elemInUse + 1
elemInUse - 1
with ex ->
raise (LogTableOverflowException($"Record \"{newRecord}\" was not logged.", ex ) )
// Create a log table and force an overflow.
let log = LogTable 4
printfn "This example of the Exception(string, Exception)\nconstructor generates the following output."
printfn "\nExample of a derived exception that references an inner exception:\n"
try
for count = 1 to 1000 do
log.AddRecord $"Log record number {count}"
|> ignore
with ex ->
printfn $"{ex}"
// This example of the Exception(string, Exception)
// constructor generates the following output.
//
// Example of a derived exception that references an inner exception:
//
// NDP_UE_FS_4+LogTableOverflowException: The log table has overflowed. - Record "Lo
// g record number 5" was not logged. ---> System.IndexOutOfRangeException: Index
// was outside the bounds of the array.
// at NDP_UE_FS_4.LogTable.AddRecord(String newRecord)
// --- End of inner exception stack trace ---
// at NDP_UE_FS_4.LogTable.AddRecord(String newRecord)
// at <StartupCode$fs>.$NDP_UE_FS_4.main@()
' Sample for Exception( String, Exception ) constructor.
Namespace NDP_UE_VB
' Derive an exception with a specifiable message and inner exception.
Class LogTableOverflowException
Inherits Exception
Private Const overflowMessage As String = _
"The log table has overflowed."
Public Sub New( )
MyBase.New( overflowMessage )
End Sub
Public Sub New( auxMessage As String )
MyBase.New( String.Format( "{0} - {1}", _
overflowMessage, auxMessage ) )
End Sub
Public Sub New( auxMessage As String, inner As Exception )
MyBase.New( String.Format( "{0} - {1}", _
overflowMessage, auxMessage ), inner )
End Sub
End Class
Class LogTable
Public Sub New( numElements As Integer )
logArea = New String( numElements ) { }
elemInUse = 0
End Sub
Protected logArea( ) As String
Protected elemInUse As Integer
' The AddRecord method throws a derived exception
' if the array bounds exception is caught.
Public Function AddRecord( newRecord As String ) As Integer
Try
Dim curElement as Integer = elemInUse
logArea( elemInUse ) = newRecord
elemInUse += 1
Return curElement
Catch ex As Exception
Throw New LogTableOverflowException( String.Format( _
"Record ""{0}"" was not logged.", newRecord ), ex )
End Try
End Function ' AddRecord
End Class
Module OverflowDemo
' Create a log table and force an overflow.
Sub Main()
Dim log As New LogTable(4)
Console.WriteLine( _
"This example of the Exception( String, Exception )" & _
vbCrLf & "constructor generates the following output." )
Console.WriteLine( vbCrLf & _
"Example of a derived exception " & vbCrLf & _
"that references an inner exception:" & vbCrLf )
Try
Dim count As Integer = 0
Do
log.AddRecord( _
String.Format( _
"Log record number {0}", count ) )
count += 1
Loop
Catch ex As Exception
Console.WriteLine( ex.ToString( ) )
End Try
End Sub
End Module ' OverflowDemo
End Namespace ' NDP_UE_VB
' This example of the Exception( String, Exception )
' constructor generates the following output.
'
' Example of a derived exception
' that references an inner exception:
'
' NDP_UE_VB.LogTableOverflowException: The log table has overflowed. - Record "
' Log record number 5" was not logged. ---> System.IndexOutOfRangeException: In
' dex was outside the bounds of the array.
' at NDP_UE_VB.LogTable.AddRecord(String newRecord)
' --- End of inner exception stack trace ---
' at NDP_UE_VB.LogTable.AddRecord(String newRecord)
' at NDP_UE_VB.OverflowDemo.Main()
Remarks
An exception that is thrown as a direct result of a previous exception should include a reference to the previous exception in the InnerException property. The InnerException property returns the same value that is passed into the constructor, or a null reference (Nothing
in Visual Basic) if the InnerException property does not supply the inner exception value to the constructor.
The following table shows the initial property values for an instance of Exception.
Property | Value |
---|---|
InnerException | The inner exception reference. |
Message | The error message string. |
Applies to
.NET 9 och andra versioner
Produkt | Versioner |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
UWP | 10.0 |
Feedback om .NET
.NET är ett öppen källkod projekt. Välj en länk för att ge feedback: