MethodBase.GetMethodBody Yöntem
Tanım
Önemli
Bazı bilgiler ürünün ön sürümüyle ilgilidir ve sürüm öncesinde önemli değişiklikler yapılmış olabilir. Burada verilen bilgilerle ilgili olarak Microsoft açık veya zımni hiçbir garanti vermez.
Türetilmiş bir sınıfta geçersiz kılındığında, MSIL akışına, yerel değişkenlere ve geçerli yöntem için özel durumlara erişim sağlayan bir MethodBody nesnesi alır.
public:
virtual System::Reflection::MethodBody ^ GetMethodBody();public virtual System.Reflection.MethodBody? GetMethodBody ();public virtual System.Reflection.MethodBody GetMethodBody ();abstract member GetMethodBody : unit -> System.Reflection.MethodBody
override this.GetMethodBody : unit -> System.Reflection.MethodBodyPublic Overridable Function GetMethodBody () As MethodBodyDöndürülenler
MethodBody GEÇERLI yöntem için MSIL akışına, yerel değişkenlere ve özel durumlara erişim sağlayan bir nesne.
Özel durumlar
Türetilmiş bir sınıfta geçersiz kılınmadığı sürece bu yöntem geçersizdir.
Örnekler
Aşağıdaki kod örneği adlı MethodBodyExample bir test yöntemini tanımlar ve yerel değişken bilgilerini ve özel durum işleme yan tümcelerini görüntüler.
MethodBase.GetMethodBody yöntemi, test yöntemi için bir MethodBody nesne almak için kullanılır.
LocalVariables özelliği, nesnelerin listesini LocalVariableInfo almak ve türlerini ve dizin sırasını görüntülemek için kullanılır. ExceptionHandlingClauses özelliği, özel durum işleme yan tümcelerinin listesini almak için kullanılır.
Not
Tüm bilgisayar dilleri yan tümceler üretemez ExceptionHandlingClauseOptions.Filter . Visual Basic örneği, diğer diller için örneklerden atlanan bir Visual Basic When ifadesi kullanan bir filtre yan tümcesi gösterir.
#using <System.dll>
using namespace System;
using namespace System::Reflection;
public ref class Example
{
// The Main method contains code to analyze this method, using
// the properties and methods of the MethodBody class.
public:
void MethodBodyExample(Object^ arg)
{
// Define some local variables. In addition to these variables,
// the local variable list includes the variables scoped to
// the catch clauses.
int var1 = 42;
String^ var2 = "Forty-two";
try
{
// Depending on the input value, throw an ArgumentException or
// an ArgumentNullException to test the Catch clauses.
if (arg == nullptr)
{
throw gcnew ArgumentNullException("The argument cannot " +
"be null.");
}
if (arg->GetType() == String::typeid)
{
throw gcnew ArgumentException("The argument cannot " +
"be a string.");
}
}
// There is no Filter clause in this code example. See the Visual
// Basic code for an example of a Filter clause.
// This catch clause handles the ArgumentException class, and
// any other class derived from Exception.
catch (ArgumentException^ ex)
{
Console::WriteLine("Ordinary exception-handling clause caught:" +
" {0}", ex->GetType());
}
finally
{
var1 = 3033;
var2 = "Another string.";
}
}
};
int main()
{
// Get method body information.
MethodInfo^ mi =
Example::typeid->GetMethod("MethodBodyExample");
MethodBody^ mb = mi->GetMethodBody();
Console::WriteLine("\r\nMethod: {0}", mi);
// Display the general information included in the
// MethodBody object.
Console::WriteLine(" Local variables are initialized: {0}",
mb->InitLocals);
Console::WriteLine(" Maximum number of items on the operand " +
"stack: {0}", mb->MaxStackSize);
// Display information about the local variables in the
// method body.
Console::WriteLine();
for each (LocalVariableInfo^ lvi in mb->LocalVariables)
{
Console::WriteLine("Local variable: {0}", lvi);
}
// Display exception handling clauses.
Console::WriteLine();
for each(ExceptionHandlingClause^ exhc in mb->ExceptionHandlingClauses)
{
Console::WriteLine(exhc->Flags.ToString());
// The FilterOffset property is meaningful only for Filter
// clauses. The CatchType property is not meaningful for
// Filter or Finally clauses.
switch(exhc->Flags)
{
case ExceptionHandlingClauseOptions::Filter:
Console::WriteLine(" Filter Offset: {0}",
exhc->FilterOffset);
break;
case ExceptionHandlingClauseOptions::Finally:
break;
default:
Console::WriteLine(" Type of exception: {0}",
exhc->CatchType);
break;
}
Console::WriteLine(" Handler Length: {0}",
exhc->HandlerLength);
Console::WriteLine(" Handler Offset: {0}",
exhc->HandlerOffset);
Console::WriteLine(" Try Block Length: {0}", exhc->TryLength);
Console::WriteLine(" Try Block Offset: {0}", exhc->TryOffset);
}
}
//This code example produces output similar to the following:
//
//Method: Void MethodBodyExample(System.Object)
// Local variables are initialized: False
// Maximum number of items on the operand stack: 4
//
//Local variable: System.ArgumentException (0)
//Local variable: System.String (1)
//Local variable: System.Int32 (2)
//Clause
// Type of exception: System.ArgumentException
// Handler Length: 29
// Handler Offset: 78
// Try Block Length: 65
// Try Block Offset: 13
//Finally
// Handler Length: 13
// Handler Offset: 113
// Try Block Length: 100
// Try Block Offset: 13
using System;
using System.Reflection;
public class Example
{
public static void Main()
{
// Get method body information.
MethodInfo mi = typeof(Example).GetMethod("MethodBodyExample");
MethodBody mb = mi.GetMethodBody();
Console.WriteLine("\r\nMethod: {0}", mi);
// Display the general information included in the
// MethodBody object.
Console.WriteLine(" Local variables are initialized: {0}",
mb.InitLocals);
Console.WriteLine(" Maximum number of items on the operand stack: {0}",
mb.MaxStackSize);
// Display information about the local variables in the
// method body.
Console.WriteLine();
foreach (LocalVariableInfo lvi in mb.LocalVariables)
{
Console.WriteLine("Local variable: {0}", lvi);
}
// Display exception handling clauses.
Console.WriteLine();
foreach (ExceptionHandlingClause ehc in mb.ExceptionHandlingClauses)
{
Console.WriteLine(ehc.Flags.ToString());
// The FilterOffset property is meaningful only for Filter
// clauses. The CatchType property is not meaningful for
// Filter or Finally clauses.
switch (ehc.Flags)
{
case ExceptionHandlingClauseOptions.Filter:
Console.WriteLine(" Filter Offset: {0}",
ehc.FilterOffset);
break;
case ExceptionHandlingClauseOptions.Finally:
break;
default:
Console.WriteLine(" Type of exception: {0}",
ehc.CatchType);
break;
}
Console.WriteLine(" Handler Length: {0}", ehc.HandlerLength);
Console.WriteLine(" Handler Offset: {0}", ehc.HandlerOffset);
Console.WriteLine(" Try Block Length: {0}", ehc.TryLength);
Console.WriteLine(" Try Block Offset: {0}", ehc.TryOffset);
}
}
// The Main method contains code to analyze this method, using
// the properties and methods of the MethodBody class.
public void MethodBodyExample(object arg)
{
// Define some local variables. In addition to these variables,
// the local variable list includes the variables scoped to
// the catch clauses.
int var1 = 42;
string var2 = "Forty-two";
try
{
// Depending on the input value, throw an ArgumentException or
// an ArgumentNullException to test the Catch clauses.
if (arg == null)
{
throw new ArgumentNullException("The argument cannot be null.");
}
if (arg.GetType() == typeof(string))
{
throw new ArgumentException("The argument cannot be a string.");
}
}
// This filter clause selects only exceptions that derive
// from the ArgumentException class.
// Other exceptions, including ArgumentException itself,
// are not handled by this filter clause.
catch (ArgumentException ex) when (ex.GetType().IsSubclassOf(typeof(ArgumentException)))
{
Console.WriteLine("Filter clause caught: {0}", ex.GetType());
}
// This catch clause handles the ArgumentException class, and
// any other class derived from Exception.
catch(Exception ex)
{
Console.WriteLine("Ordinary exception-handling clause caught: {0}",
ex.GetType());
}
finally
{
var1 = 3033;
var2 = "Another string.";
}
}
}
// This code example produces output similar to the following:
//
//Method: Void MethodBodyExample(System.Object)
// Local variables are initialized: True
// Maximum number of items on the operand stack: 2
//
//Local variable: System.Int32 (0)
//Local variable: System.String (1)
//Local variable: System.Exception (2)
//Local variable: System.Boolean (3)
//
//Filter
// Filter Offset: 71
// Handler Length: 23
// Handler Offset: 116
// Try Block Length: 61
// Try Block Offset: 10
//Clause
// Type of exception: System.Exception
// Handler Length: 21
// Handler Offset: 70
// Try Block Length: 61
// Try Block Offset: 9
//Finally
// Handler Length: 14
// Handler Offset: 94
// Try Block Length: 85
// Try Block Offset: 9
Imports System.Reflection
Public Class Example
Public Shared Sub Main()
' Demonstrate the effect of the Visual Basic When keyword, which
' generates a Filter clause in the Try block.
Dim e As New Example()
Console.WriteLine()
e.MethodBodyExample("String argument")
e.MethodBodyExample(Nothing)
' Get method body information.
Dim mi As MethodInfo = _
GetType(Example).GetMethod("MethodBodyExample")
Dim mb As MethodBody = mi.GetMethodBody()
Console.WriteLine(vbCrLf & "Method: {0}", mi)
' Display the general information included in the
' MethodBody object.
Console.WriteLine(" Local variables are initialized: {0}", _
mb.InitLocals)
Console.WriteLine(" Maximum number of items on the operand stack: {0}", _
mb.MaxStackSize)
' Display information about the local variables in the
' method body.
Console.WriteLine()
For Each lvi As LocalVariableInfo In mb.LocalVariables
Console.WriteLine("Local variable: {0}", lvi)
Next
' Display exception handling clauses.
Console.WriteLine()
For Each ehc As ExceptionHandlingClause In mb.ExceptionHandlingClauses
Console.WriteLine(ehc.Flags.ToString())
' The FilterOffset property is meaningful only for Filter
' clauses. The CatchType property is not meaningful for
' Filter or Finally clauses.
Select Case ehc.Flags
Case ExceptionHandlingClauseOptions.Filter
Console.WriteLine(" Filter Offset: {0}", _
ehc.FilterOffset)
Case ExceptionHandlingClauseOptions.Finally
Case Else
Console.WriteLine(" Type of exception: {0}", _
ehc.CatchType)
End Select
Console.WriteLine(" Handler Length: {0}", ehc.HandlerLength)
Console.WriteLine(" Handler Offset: {0}", ehc.HandlerOffset)
Console.WriteLine(" Try Block Length: {0}", ehc.TryLength)
Console.WriteLine(" Try Block Offset: {0}", ehc.TryOffset)
Next
End Sub
' This test method is executed at the beginning of Main, to show
' how the Filter clause works. The Filter clause is generated by
' a Visual Basic When expression. If arg is Nothing, this method
' throws ArgumentNullException, which is caught by the filter
' clause. If arg is a string, the method throws ArgumentException,
' which does not match the filter clause.
'
' Sub Main also contains code to analyze this method, using
' the properties and methods of the MethodBody class.
Public Sub MethodBodyExample(ByVal arg As Object)
' Define some local variables. In addition to these variables,
' the local variable list includes the variables scoped to
' the catch clauses.
Dim var1 As Integer = 42
Dim var2 As String = "Forty-two"
Try
' Depending on the input value, throw an ArgumentException or
' an ArgumentNullException to test the Catch clauses.
'
If arg Is Nothing Then
Throw New ArgumentNullException("The argument cannot be Nothing.")
End If
If arg.GetType() Is GetType(String) Then
Throw New ArgumentException("The argument cannot be a string.")
End If
' The When expression makes this a filter clause. The expression
' selects only exceptions that derive from the ArgumentException
' class. Other exceptions, including ArgumentException itself,
' are not handled by this filter clause.
Catch ex As ArgumentException _
When ex.GetType().IsSubclassOf(GetType(ArgumentException))
Console.WriteLine("Filter clause caught: {0}", ex.GetType())
' This catch clause handles the ArgumentException class, and
' any other class derived from Exception.
Catch ex As Exception
Console.WriteLine("Ordinary exception-handling clause caught: {0}", _
ex.GetType())
Finally
var1 = 3033
var2 = "Another string."
End Try
End Sub
End Class
' This code example produces output similar to the following:
'
'Ordinary exception-handling clause caught: System.ArgumentException
'Filter clause caught: System.ArgumentNullException
'
'Method: Void MethodBodyExample(System.Object)
' Local variables are initialized: True
' Maximum number of items on the operand stack: 3
'
'Local variable: System.Int32 (0)
'Local variable: System.String (1)
'Local variable: System.ArgumentException (2)
'Local variable: System.Exception (3)
'
'Filter
' Filter Offset: 0
' Handler Length: 19
' Handler Offset: 99
' Try Block Length: 45
' Try Block Offset: 9
'Clause
' Type of exception: System.Exception
' Handler Length: 25
' Handler Offset: 118
' Try Block Length: 45
' Try Block Offset: 9
'Finally
' Handler Length: 13
' Handler Offset: 153
' Try Block Length: 144
' Try Block Offset: 9
Açıklamalar
Kullanmak için öğesini GetMethodBody geçersiz kılmanız gerekmez. yöntemi MethodInfoConstructorInfo, bu sınıfların GetMethodBody çalışma zamanı sürümlerinde geçersiz kılındığından ve nesnelerinde yöntemini çağırabilirsiniz. Örneğin, sınıfın MethodInfo çalışma zamanı sürümü sınıfından MethodInfo türetilir ve bu da sınıfından MethodBase türetilir.
Şunlara uygulanır
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