CryptographicException Classe

Definizione

Spazio dei nomi:

System.Security.Cryptography

Assembly:

System.Runtime.dll

Origine:

CryptographicException.cs

Eccezione generata quando si verifica un errore durante un'operazione di crittografia.

public ref class CryptographicException : SystemException

public class CryptographicException : SystemException

type CryptographicException = class
    inherit SystemException

Public Class CryptographicException
Inherits SystemException

Ereditarietà

Object

Exception

SystemException

CryptographicException

Derivato

System.Security.Cryptography.AuthenticationTagMismatchException

System.Security.Cryptography.CryptographicUnexpectedOperationException

System.Security.Cryptography.X509Certificates.Pkcs12LoadLimitExceededException

Esempio

Nell'esempio di codice seguente viene illustrato come usare i membri della classe CryptographicException.

using namespace System;
using namespace System::Text;
using namespace System::Security::Cryptography;
using namespace System::Runtime::Serialization;

ref class CryptographicExceptionMembers
{
public:

   static void Run()
   {
      CryptographicExceptionMembers^ testRun = gcnew CryptographicExceptionMembers;
      testRun->TestConstructors();
      testRun->ShowProperties();
      Console::WriteLine( L"This sample ended successfully; "
      L" press Enter to exit." );
      Console::ReadLine();
   }

private:
   // Test each public implementation of the CryptographicException
   // constructors.
   void TestConstructors()
   {
      EmptyConstructor();
      IntConstructor();
      StringConstructor();
      StringExceptionConstructor();
      StringStringConstructor();
   }

   void EmptyConstructor()
   {
      // Construct a CryptographicException with no parameters.
      CryptographicException^ cryptographicException = gcnew CryptographicException;
      
      Console::WriteLine( L"Created an empty CryptographicException." );
   }

   void IntConstructor()
   {
      // Construct a CryptographicException using the error code for an
      // unexpected operation exception.
      int exceptionNumber = (int)0x80131431;
      CryptographicException^ cryptographicException = gcnew CryptographicException( exceptionNumber );

      Console::WriteLine( L"Created a CryptographicException with the "
      L"following error code: {0}", exceptionNumber );
   }

   void StringConstructor()
   {
      // Construct a CryptographicException using a custom error message.
      String^ errorMessage = (L"Unexpected Operation exception.");
      CryptographicException^ cryptographicException = gcnew CryptographicException( errorMessage );

      Console::WriteLine( L"Created a CryptographicException with the "
      L"following error message: {0}", errorMessage );
   }

   void StringExceptionConstructor()
   {
      // Construct a CryptographicException using a custom error message
      // and an inner exception.
      String^ errorMessage = (L"The current operation is not supported.");
      NullReferenceException^ nullException = gcnew NullReferenceException;
      CryptographicException^ cryptographicException = gcnew CryptographicException( errorMessage,nullException );

      Console::WriteLine( L"Created a CryptographicException with the "
      L"following error message: {0} and the inner exception of {1}", errorMessage, nullException );
   }

   void StringStringConstructor()
   {
      // Create a CryptographicException using a time format and a the
      // current date.
      String^ dateFormat = L"{0:t}";
      String^ timeStamp = (DateTime::Now.ToString());
      CryptographicException^ cryptographicException = gcnew CryptographicException( dateFormat,timeStamp );

      Console::WriteLine( L"Created a CryptographicException with ({0}) as the format and ({1}) as the message.", dateFormat, timeStamp );
   }

   // Construct an invalid DSACryptoServiceProvider to throw a
   // CryptographicException for introspection.
   void ShowProperties()
   {
      try
      {
         // Create a DSACryptoServiceProvider with invalid provider type
         // code to throw a CryptographicException exception.
         CspParameters^ cspParams = gcnew CspParameters( 44 );
         DSACryptoServiceProvider^ DSAalg = gcnew DSACryptoServiceProvider( cspParams );
      }
      catch ( CryptographicException^ ex ) 
      {
         // Retrieve the link to the help file for the exception.
         String^ helpLink = ex->HelpLink;

         // Retrieve the exception that caused the current
         // CryptographicException exception.
         System::Exception^ innerException = ex->InnerException;

         String^ innerExceptionMessage = L"";
         if ( innerException != nullptr )
         {
            innerExceptionMessage = innerException->ToString();
         }
         
         // Retrieve the message that describes the exception.
         String^ message = ex->Message;

         // Retrieve the name of the application that caused the exception.
         String^ exceptionSource = ex->Source;

         // Retrieve the call stack at the time the exception occurred.
         String^ stackTrace = ex->StackTrace;

         // Retrieve the method that threw the exception.
         System::Reflection::MethodBase^ targetSite = ex->TargetSite;

         String^ siteName = targetSite->Name;
         
         // Retrieve the entire exception as a single string.
         String^ entireException = ex->ToString();

         // GetObjectData
         setSerializationInfo(  &ex );
         
         // Get the root exception that caused the current
         // CryptographicException exception.
         System::Exception^ baseException = ex->GetBaseException();

         String^ baseExceptionMessage = L"";
         if ( baseException != nullptr )
         {
            baseExceptionMessage = baseException->Message;
         }
         Console::WriteLine( L"Caught an expected exception:" );
         Console::WriteLine( entireException );
         Console::WriteLine( L"\n" );
         Console::WriteLine( L"Properties of the exception are as follows:" );
         Console::WriteLine( L"Message: {0}", message );
         Console::WriteLine( L"Source: {0}", exceptionSource );
         Console::WriteLine( L"Stack trace: {0}", stackTrace );
         Console::WriteLine( L"Help link: {0}", helpLink );
         Console::WriteLine( L"Target site's name: {0}", siteName );
         Console::WriteLine( L"Base exception message: {0}", baseExceptionMessage );
         Console::WriteLine( L"Inner exception message: {0}", innerExceptionMessage );
      }

   }

   void setSerializationInfo( interior_ptr<CryptographicException^> ex )
   {
      // Insert information about the exception into a serialized object.
      FormatterConverter^ formatConverter = gcnew FormatterConverter;
      SerializationInfo^ serializationInfo = gcnew SerializationInfo( ( *ex)->GetType(),formatConverter );
      StreamingContext streamingContext = StreamingContext(StreamingContextStates::All);
      ( *ex)->GetObjectData( serializationInfo, streamingContext );
   }

};

void main()
{
   CryptographicExceptionMembers::Run();
}

//
// This sample produces the following output:
//
// Created an empty CryptographicException.
// Created a CryptographicException with the following error code: -2146233295
// Created a CryptographicException with the following error message:
// Unexpected Operation exception.
// Created a CryptographicException with the following error message: The
// current operation is not supported. and the inner exception of
// System.NullReferenceException: Object reference not set to an instance of
// an object.
// Created a CryptographicException with ({0:t}) as the format and (2/24/2004
// 2:13:15 PM) as the message.
// Caught an expected exception:
// System.Security.Cryptography.CryptographicException: CryptoAPI
// cryptographic service provider (CSP) for this implementation could not be
// acquired.
//  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(Int32
// dwKeySize, CspParameters parameters)
//  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(
// CspParametersparameters)
//  at CryptographicExceptionMembers.ShowProperties() in c:\inetpub\
// vssolutions\test\testbuild\consoleapplication1\class1.cs:line 109
//
//
// Properties of the exception are as follows:
// Message: CryptoAPI cryptographic service provider (CSP) for this
// implementation could not be acquired.
// Source: mscorlib
// Stack trace:
//  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(
// Int32 dwKeySize, CspParameters parameters)
//  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(
// CspParameters parameters)
//  at CryptographicExceptionMembers.ShowProperties() in c:\inetpub\
// vssolutions\test\testbuild\consoleapplication1\class1.cs:line 109
// Help link:
// Target site's name: .ctor
// Base exception message: CryptoAPI cryptographic service provider (CSP) for
// this implementation could not be acquired.
// Inner exception message:
// This sample ended successfully;  press Enter to exit.

using System;
using System.Text;
using System.Security.Cryptography;
using System.Runtime.Serialization;

class CryptographicExceptionMembers
{
    [STAThread]
    public static void Main(string[] args)
    {
        CryptographicExceptionMembers testRun = 
            new CryptographicExceptionMembers();
        testRun.TestConstructors();
        testRun.ShowProperties();
        
        Console.WriteLine("This sample ended successfully; " + 
            " press Enter to exit.");
        Console.ReadLine();
    }

    // Test each public implementation of the CryptographicException
    // constructors.
    private void TestConstructors()
    {
        EmptyConstructor();
        IntConstructor();
        StringConstructor();
        StringExceptionConstructor();
        StringStringConstructor();
    }

    private void EmptyConstructor()
    {
        // Construct a CryptographicException with no parameters.
        CryptographicException cryptographicException =
            new CryptographicException();
        Console.WriteLine("Created an empty CryptographicException.");
    }

    private void IntConstructor()
    {
        // Construct a CryptographicException using the error code for an
        // unexpected operation exception.
        int exceptionNumber = unchecked((int)0x80131431);
        CryptographicException cryptographicException =
            new CryptographicException(exceptionNumber);
        Console.WriteLine("Created a CryptographicException with the " + 
            "following error code: " + exceptionNumber);
    }

    private void StringConstructor()
    {
        // Construct a CryptographicException using a custom error message.
        string errorMessage = ("Unexpected Operation exception.");
        CryptographicException cryptographicException =
            new CryptographicException(errorMessage);
        Console.WriteLine("Created a CryptographicException with the " + 
            "following error message: " + errorMessage);
    }

    private void StringExceptionConstructor()
    {
        // Construct a CryptographicException using a custom error message
        // and an inner exception.
        string errorMessage = ("The current operation is not supported.");
        NullReferenceException nullException = new NullReferenceException();
        CryptographicException cryptographicException = 
            new CryptographicException(errorMessage, nullException);
        Console.WriteLine("Created a CryptographicException with the " +
            "following error message: " + errorMessage + 
            " and the inner exception of " + nullException.ToString());
    }

    private void StringStringConstructor()
    {
        // Create a CryptographicException using a time format and a the 
        // current date.
        string dateFormat = "{0:t}";
        string timeStamp = (DateTime.Now.ToString());
        CryptographicException cryptographicException = 
            new CryptographicException(dateFormat, timeStamp);
        Console.WriteLine("Created a CryptographicException with (" +
            dateFormat + ") as the format and (" + timeStamp + 
            ") as the message.");
    }

    // Construct an invalid DSACryptoServiceProvider to throw a
    // CryptographicException for introspection.
    private void ShowProperties()
    {
        try 
        {
            // Create a DSACryptoServiceProvider with invalid provider type
            // code to throw a CryptographicException exception.
            CspParameters cspParams = new CspParameters(44);
            DSACryptoServiceProvider DSAalg = 
                new DSACryptoServiceProvider(cspParams);
        }
        catch (CryptographicException ex)
        {
            // Retrieve the link to the help file for the exception.
            string helpLink = ex.HelpLink;
            
            // Retrieve the exception that caused the current
            // CryptographicException exception.
            System.Exception innerException = ex.InnerException;
            string innerExceptionMessage = "";
            if (innerException != null)
            {
                innerExceptionMessage = innerException.ToString();
            }

            // Retrieve the message that describes the exception.
            string message = ex.Message;

            // Retrieve the name of the application that caused the exception.
            string exceptionSource = ex.Source;

            // Retrieve the call stack at the time the exception occurred.
            string stackTrace = ex.StackTrace;

            // Retrieve the method that threw the exception.
            System.Reflection.MethodBase targetSite = ex.TargetSite;
            string siteName = targetSite.Name;

            // Retrieve the entire exception as a single string.
            string entireException = ex.ToString();

            // GetObjectData
            setSerializationInfo(ref ex);

            // Get the root exception that caused the current
            // CryptographicException exception.
            System.Exception baseException = ex.GetBaseException();
            string baseExceptionMessage = "";
            if (baseException != null)
            {
                baseExceptionMessage = baseException.Message;
            }

            Console.WriteLine("Caught an expected exception:");
            Console.WriteLine(entireException);

            Console.WriteLine("\n");
            Console.WriteLine("Properties of the exception are as follows:");
            Console.WriteLine("Message: " + message);
            Console.WriteLine("Source: " + exceptionSource);
            Console.WriteLine("Stack trace: " + stackTrace);
            Console.WriteLine("Help link: " + helpLink);
            Console.WriteLine("Target site's name: " + siteName);
            Console.WriteLine("Base exception message: " + 
                baseExceptionMessage);
            Console.WriteLine("Inner exception message: " + 
                innerExceptionMessage);
        }
    }

    private void setSerializationInfo(ref CryptographicException ex)
    {
        // Insert information about the exception into a serialized object.
        FormatterConverter formatConverter = new FormatterConverter();
        SerializationInfo serializationInfo =
            new SerializationInfo(ex.GetType(), formatConverter);
        StreamingContext streamingContext =
            new StreamingContext(StreamingContextStates.All);

        ex.GetObjectData(serializationInfo,streamingContext);
    }
}
//
// This sample produces the following output:
//
// Created an empty CryptographicException.
// Created a CryptographicException with the following error code: -2146233295
// Created a CryptographicException with the following error message: 
// Unexpected Operation exception.
// Created a CryptographicException with the following error message: The
// current operation is not supported. and the inner exception of 
// System.NullReferenceException: Object reference not set to an instance of
// an object.
// Created a CryptographicException with ({0:t}) as the format and (2/24/2004
// 2:13:15 PM) as the message.
// Caught an expected exception:
// System.Security.Cryptography.CryptographicException: CryptoAPI
// cryptographic service provider (CSP) for this implementation could not be
// acquired. 
//  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(Int32
// dwKeySize, CspParameters parameters)
//  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(
// CspParametersparameters)
//  at CryptographicExceptionMembers.ShowProperties() in c:\inetpub\
// vssolutions\test\testbuild\consoleapplication1\class1.cs:line 109
//
//
// Properties of the exception are as follows:
// Message: CryptoAPI cryptographic service provider (CSP) for this
// implementation could not be acquired.
// Source: mscorlib
// Stack trace:    
//  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(
// Int32 dwKeySize, CspParameters parameters) 
//  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(
// CspParameters parameters)
//  at CryptographicExceptionMembers.ShowProperties() in c:\inetpub\
// vssolutions\test\testbuild\consoleapplication1\class1.cs:line 109
// Help link:
// Target site's name: .ctor
// Base exception message: CryptoAPI cryptographic service provider (CSP) for
// this implementation could not be acquired.
// Inner exception message:
// This sample ended successfully;  press Enter to exit.

Imports System.Text
Imports System.Security.Cryptography
Imports System.Runtime.Serialization

Public Class Form1
    Inherits System.Windows.Forms.Form

    ' Event handler for Run button.
    Private Sub Button1_Click( _
        ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles Button1.Click

        tbxOutput.Cursor = Cursors.WaitCursor
        tbxOutput.Text = ""

        TestConstructors()
        ShowProperties()

        ' Reset the cursor and conclude application.
        tbxOutput.AppendText(vbCrLf + "This sample completed " + _
            "successfully; Exit to continue.")
        tbxOutput.Cursor = Cursors.Default
    End Sub

    ' Test each public implementation of the CryptographicException
    ' constructors.
    Private Sub TestConstructors()
        EmptyConstructor()
        IntConstructor()
        StringConstructor()
        StringExceptionConstructor()
        StringStringConstructor()
    End Sub

    Private Sub EmptyConstructor()
        ' Construct a CryptographicException with no parameters.
        Dim cryptographicException As New CryptographicException
        WriteLine("Created an empty CryptographicException.")
    End Sub

    Private Sub IntConstructor()
        ' Construct a CryptographicException using the error code for an
        ' unexpected operation exception.
        Dim exceptionNumber As Integer = &H80131431
        Dim cryptographicException As _
            New CryptographicException(exceptionNumber)
        WriteLine("Created a CryptographicException with the " + _
            "following error code: " + exceptionNumber.ToString())
    End Sub

    Private Sub StringConstructor()
        ' Construct a CryptographicException using a custom error message.
        Dim errorMessage As String = "Unexpected Operation exception."
        Dim cryptographicException As New CryptographicException(errorMessage)
        WriteLine("Created a CryptographicException with the " + _
            "following error message: " + errorMessage)
    End Sub

    Private Sub StringExceptionConstructor()
        ' Construct a CryptographicException using a custom error message
        ' and an inner exception.
        Dim errorMessage As String = "The current operation is not supported."
        Dim nullException As New NullReferenceException
        Dim cryptographicException As _
            New CryptographicException(errorMessage, nullException)
        Write("Created a CryptographicException with the following error ")
        Write("message: " + errorMessage + " and the inner exception of ")
        WriteLine(nullException.ToString())
    End Sub

    Private Sub StringStringConstructor()
        ' Create a CryptographicException using a time format and a the 
        ' current date.
        Dim dateFormat As String = "{0:t}"
        Dim timeStamp As String = DateTime.Now.ToString()
        Dim cryptographicException As _
            New CryptographicException(dateFormat, timeStamp)
        Write("Created a CryptographicException with (" + dateFormat)
        WriteLine(") as the format and (" + timeStamp + ") as the message.")
    End Sub

    ' Construct an invalid DSACryptoServiceProvider to throw a
    ' CryptographicException for introspection.
    Private Sub ShowProperties()
        Try
            ' Create a DSACryptoServiceProvider with invalid provider type
            ' code to throw a CryptographicException exception.
            Dim cspParams As New CspParameters(44)
            Dim DSAalg As New DSACryptoServiceProvider(cspParams)
        Catch ex As CryptographicException
            ' Retrieve the link to the help file for the exception.
            Dim helpLink As String = ex.HelpLink

            ' Retrieve the exception that caused the current
            ' CryptographicException exception.
            Dim innerException As System.Exception = ex.InnerException
            Dim innerExceptionMessage As String = ""
            If (Not innerException Is Nothing) Then
                innerExceptionMessage = innerException.ToString()
            End If

            ' Retrieve the message that describes the exception.
            Dim message As String = ex.Message

            ' Retrieve the name of the application that caused the exception.
            Dim exceptionSource As String = ex.Source

            ' Retrieve the call stack at the time the exception occurred.
            Dim stackTrace As String = ex.StackTrace

            ' Retrieve the method that threw the exception.
            Dim targetSite As System.Reflection.MethodBase
            targetSite = ex.TargetSite
            Dim siteName As String = targetSite.Name

            ' Retrieve the entire exception as a single string.
            Dim entireException As String = ex.ToString()

            ' GetObjectData
            setSerializationInfo(ex)

            ' Get the root exception that caused the current
            ' CryptographicException exception.
            Dim baseException As System.Exception = ex.GetBaseException()
            Dim baseExceptionMessage As String = ""
            If (Not baseException Is Nothing) Then
                baseExceptionMessage = baseException.Message
            End If

            WriteLine("Caught an expected exception:")
            WriteLine(entireException)

            WriteLine(vbCrLf + "Properties of the exception are as follows:")
            WriteLine("Message: " + message)
            WriteLine("Source: " + exceptionSource)
            WriteLine("Stack trace: " + stackTrace)
            WriteLine("Help link: " + helpLink)
            WriteLine("Target site's name: " + siteName)
            WriteLine("Base exception message: " + baseExceptionMessage)
            WriteLine("Inner exception message: " + innerExceptionMessage)

        End Try
    End Sub

    Private Sub setSerializationInfo(ByRef ex As CryptographicException)
        ' Insert information about the exception into a serialized object.
        Dim formatConverter As New FormatterConverter
        Dim serializationInfo As _
            New SerializationInfo(ex.GetType(), formatConverter)
        Dim streamingContext As _
            New StreamingContext(StreamingContextStates.All)

        ex.GetObjectData(serializationInfo, streamingContext)
    End Sub

    ' Write specified message to the output textbox.
    Private Sub Write(ByVal message As String)
        tbxOutput.AppendText(message)
    End Sub

    ' Write specified message with a carriage return to the output textbox.
    Private Sub WriteLine(ByVal message As String)
        tbxOutput.AppendText(message + vbCrLf)
    End Sub

    ' Event handler for Exit button.
    Private Sub Button2_Click( _
        ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles Button2.Click

        Application.Exit()
    End Sub
#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents Panel2 As System.Windows.Forms.Panel
    Friend WithEvents Panel1 As System.Windows.Forms.Panel
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents tbxOutput As System.Windows.Forms.RichTextBox
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.Panel2 = New System.Windows.Forms.Panel
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Panel1 = New System.Windows.Forms.Panel
        Me.tbxOutput = New System.Windows.Forms.RichTextBox
        Me.Panel2.SuspendLayout()
        Me.Panel1.SuspendLayout()
        Me.SuspendLayout()
        '
        'Panel2
        '
        Me.Panel2.Controls.Add(Me.Button1)
        Me.Panel2.Controls.Add(Me.Button2)
        Me.Panel2.Dock = System.Windows.Forms.DockStyle.Bottom
        Me.Panel2.DockPadding.All = 20
        Me.Panel2.Location = New System.Drawing.Point(0, 320)
        Me.Panel2.Name = "Panel2"
        Me.Panel2.Size = New System.Drawing.Size(616, 64)
        Me.Panel2.TabIndex = 1
        '
        'Button1
        '
        Me.Button1.Dock = System.Windows.Forms.DockStyle.Right
        Me.Button1.Font = New System.Drawing.Font( _
            "Microsoft Sans Serif", _
            9.0!, _
            System.Drawing.FontStyle.Regular, _
            System.Drawing.GraphicsUnit.Point, _
            CType(0, Byte))
        Me.Button1.Location = New System.Drawing.Point(446, 20)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(75, 24)
        Me.Button1.TabIndex = 2
        Me.Button1.Text = "&Run"
        '
        'Button2
        '
        Me.Button2.Dock = System.Windows.Forms.DockStyle.Right
        Me.Button2.Font = New System.Drawing.Font( _
            "Microsoft Sans Serif", _
            9.0!, _
            System.Drawing.FontStyle.Regular, _
            System.Drawing.GraphicsUnit.Point, _
            CType(0, Byte))
        Me.Button2.Location = New System.Drawing.Point(521, 20)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(75, 24)
        Me.Button2.TabIndex = 3
        Me.Button2.Text = "E&xit"
        '
        'Panel1
        '
        Me.Panel1.Controls.Add(Me.tbxOutput)
        Me.Panel1.Dock = System.Windows.Forms.DockStyle.Fill
        Me.Panel1.DockPadding.All = 20
        Me.Panel1.Location = New System.Drawing.Point(0, 0)
        Me.Panel1.Name = "Panel1"
        Me.Panel1.Size = New System.Drawing.Size(616, 320)
        Me.Panel1.TabIndex = 2
        '
        'tbxOutput
        '
        Me.tbxOutput.AccessibleDescription = _
            "Displays output from application."
        Me.tbxOutput.AccessibleName = "Output textbox."
        Me.tbxOutput.Dock = System.Windows.Forms.DockStyle.Fill
        Me.tbxOutput.Location = New System.Drawing.Point(20, 20)
        Me.tbxOutput.Name = "tbxOutput"
        Me.tbxOutput.Size = New System.Drawing.Size(576, 280)
        Me.tbxOutput.TabIndex = 1
        Me.tbxOutput.Text = "Click the Run button to run the application."
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 15)
        Me.ClientSize = New System.Drawing.Size(616, 384)
        Me.Controls.Add(Me.Panel1)
        Me.Controls.Add(Me.Panel2)
        Me.Name = "Form1"
        Me.Text = "CryptographicException"
        Me.Panel2.ResumeLayout(False)
        Me.Panel1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region
End Class
'
' This sample produces the following output:
'
' Created an empty CryptographicException.
' Created a CryptographicException with the following error code: -2146233295
' Created a CryptographicException with the following error message:
' Unexpected Operation exception.
' Created a CryptographicException with the following error message:
' The current operation is not supported. and the inner exception of 
' System.NullReferenceException: Object reference not set to an instance of an
' object.
' Created a CryptographicException with ({0:t}) as the format and (2/24/2004 
' 2:19:32 PM) as the message.
' Caught an expected exception:
' System.Security.Cryptography.CryptographicException: CryptoAPI cryptographic
' service provider (CSP) for this implementation could not be acquired.
'  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(
' Int32 dwKeySize, CspParameters parameters)
'  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(
' CspParameters parameters)
'  at WindowsApplication1.Form1.ShowProperties() in 
' C:\WindowsApplication1\Form1.vb:line 103
'
' Properties of the exception are as follows:
' Message: CryptoAPI cryptographic service provider (CSP) for this
' implementation could not be acquired.
' Source: mscorlib
' Stack trace:    at System.Security.Cryptography.DSACryptoServiceProvider..
' ctor(Int32 dwKeySize, CspParameters parameters)
'  at System.Security.Cryptography.DSACryptoServiceProvider..ctor(
' CspParameters parameters)
'  at WindowsApplication1.Form1.ShowProperties() in 
' C:\WindowsApplication1\Form1.vb:line 103
' Help link: 
' Target site's name: .ctor
' Base exception message: CryptoAPI cryptographic service provider (CSP) for
' this implementation could not be acquired.
' Inner exception message: 
' 
' This sample completed successfully; Exit to continue

Commenti

CryptographicException usa il CORSEC_E_CRYPTO HRESULT, a meno che non venga specificato un codice di errore alternativo.

Per un elenco dei valori iniziali delle proprietà per un'istanza di CryptographicException, vedere il costruttore .

Costruttori

CryptographicException()	Inizializza una nuova istanza della classe CryptographicException con le proprietà predefinite.
CryptographicException(Int32)	Inizializza una nuova istanza della classe CryptographicException con il codice di errore HRESULT specificato.
CryptographicException(SerializationInfo, StreamingContext)	Obsoleti. Inizializza una nuova istanza della classe CryptographicException con dati serializzati.
CryptographicException(String)	Inizializza una nuova istanza della classe CryptographicException con un messaggio di errore specificato.
CryptographicException(String, Exception)	Inizializza una nuova istanza della classe CryptographicException con un messaggio di errore specificato e un riferimento all'eccezione interna che è la causa di questa eccezione.
CryptographicException(String, String)	Inizializza una nuova istanza della classe CryptographicException con un messaggio di errore specificato nel formato specificato.

Proprietà

Data	Ottiene una raccolta di coppie chiave/valore che forniscono informazioni aggiuntive definite dall'utente sull'eccezione. (Ereditato da Exception)
HelpLink	Ottiene o imposta un collegamento al file della Guida associato a questa eccezione. (Ereditato da Exception)
HResult	Ottiene o imposta HRESULT, valore numerico codificato assegnato a un'eccezione specifica. (Ereditato da Exception)
InnerException	Ottiene l'istanza di Exception che ha causato l'eccezione corrente. (Ereditato da Exception)
Message	Ottiene un messaggio che descrive l'eccezione corrente. (Ereditato da Exception)
Source	Ottiene o imposta il nome dell'applicazione o dell'oggetto che causa l'errore. (Ereditato da Exception)
StackTrace	Ottiene una rappresentazione di stringa dei fotogrammi immediati nello stack di chiamate. (Ereditato da Exception)
TargetSite	Ottiene il metodo che genera l'eccezione corrente. (Ereditato da Exception)

Metodi

Equals(Object)	Determina se l'oggetto specificato è uguale all'oggetto corrente. (Ereditato da Object)
GetBaseException()	Quando sottoposto a override in una classe derivata, restituisce il Exception che rappresenta la causa radice di una o più eccezioni successive. (Ereditato da Exception)
GetHashCode()	Funge da funzione hash predefinita. (Ereditato da Object)
GetObjectData(SerializationInfo, StreamingContext)	Obsoleti. In caso di override in una classe derivata, imposta il SerializationInfo con informazioni sull'eccezione. (Ereditato da Exception)
GetType()	Ottiene il tipo di runtime dell'istanza corrente. (Ereditato da Exception)
MemberwiseClone()	Crea una copia superficiale del Objectcorrente. (Ereditato da Object)
ToString()	Crea e restituisce una rappresentazione di stringa dell'eccezione corrente. (Ereditato da Exception)

Eventi

SerializeObjectState

Obsoleti. Si verifica quando viene serializzata un'eccezione per creare un oggetto stato dell'eccezione contenente dati serializzati sull'eccezione. (Ereditato da Exception)

Vedi anche

• Exception
• gestione e generazione di eccezioni
• servizi di crittografia