MethodBody Class

Definition

메서드의 본문에 대 한 메타 데이터와 MSIL에 대 한 액세스를 제공합니다.Provides access to the metadata and MSIL for the body of a method.

public ref class MethodBody
public ref class MethodBody sealed
public class MethodBody
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class MethodBody
[System.Runtime.InteropServices.ComVisible(true)]
public class MethodBody
type MethodBody = class
Public Class MethodBody
Public NotInheritable Class MethodBody
Inheritance
MethodBody
Attributes

Examples

다음 코드 예제에서는 MethodBodyExample 이라는 테스트 메서드를 정의 하 고 해당 지역 변수 정보 및 예외 처리 절을 표시 합니다.The following code example defines a test method named MethodBodyExample and displays its local variable information and exception-handling clauses. MethodBase.GetMethodBody 메서드는 테스트 메서드에 대 한 MethodBody 개체를 가져오는 데 사용 됩니다.The MethodBase.GetMethodBody method is used to obtain a MethodBody object for the test method.

이 예에서는 LocalVariables 속성을 사용 하 여 LocalVariableInfo 개체 목록을 가져온 다음 해당 형식 및 인덱스 순서를 표시 합니다.The example uses the LocalVariables property to obtain a list of LocalVariableInfo objects and then displays their types and index order. ExceptionHandlingClauses 속성은 예외 처리 절의 목록을 가져오는 데 사용 됩니다.The ExceptionHandlingClauses property is used to obtain a list of exception-handling clauses.

#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

Remarks

MethodBody 클래스를 사용 하면 메서드 본문의 지역 변수 및 예외 처리 절과 메서드 본문을 구성 하는 MSIL (Microsoft 중간 언어)에 대 한 정보에 액세스할 수 있습니다.The MethodBody class provides access to information about the local variables and exception-handling clauses in a method body, and to the Microsoft intermediate language (MSIL) that makes up the method body.

ResolveType, ResolveMethodResolveType와 같은 module 클래스의 토큰 확인 메서드를 사용 하 여 메서드 본문의 토큰을 확인 하 고, 메서드 본문의 MSIL에서 액세스 하는 형식, 메서드 및 필드에 대 한 자세한 정보를 제공 하는 개체, MethodInfo 개체 및 FieldInfo 개체를 Type 수 있습니다.You can use the token-resolution methods of the module class, such as ResolveType, ResolveMethod, and ResolveType, to resolve the tokens in the method body to Type objects, MethodInfo objects, and FieldInfo objects that provide detailed information about the types, methods, and fields accessed by the MSIL in the method body.

Note

메서드 본문을 구문 분석 메타 데이터 및 MSIL 명령 형식 완전히 이해를 해야 합니다.Parsing method bodies requires a thorough understanding of metadata and MSIL instruction formats. 공용 언어 인프라 (CLI) 설명서에서 "파티션 II: 메타 데이터 정의 및 의미" 및 "III 파티션: CIL 명령 집합" 정보를 찾을 수 있습니다.Information can be found in the Common Language Infrastructure (CLI) documentation, especially "Partition II: Metadata Definition and Semantics" and "Partition III: CIL Instruction Set". 이 설명서는 온라인으로 제공됩니다. MSDN의 ECMA C# 및 공용 언어 인프라 표준 및 Ecma International 웹 사이트의 표준 ECMA-335 - CLI(공용 언어 인프라)를 참조하세요.The documentation is available online; see ECMA C# and Common Language Infrastructure Standards on MSDN and Standard ECMA-335 - Common Language Infrastructure (CLI) on the Ecma International Web site.

지정 된 메서드에 대 한 MethodBody 개체를 가져오려면 먼저 메서드에 대 한 MethodInfo 개체를 가져온 다음 MethodInfo 개체의 GetMethodBody 메서드를 호출 합니다.To obtain a MethodBody object for a given method, first obtain a MethodInfo object for the method, then call the MethodInfo object's GetMethodBody method.

Properties

ExceptionHandlingClauses

메서드 본문의 모든 예외 처리 절을 포함하는 목록을 가져옵니다.Gets a list that includes all the exception-handling clauses in the method body.

InitLocals

지역 변수에 메서드 본문에서 해당 형식의 기본값으로 초기화 되는지 여부를 나타내는 값을 가져옵니다.Gets a value indicating whether local variables in the method body are initialized to the default values for their types.

LocalSignatureMetadataToken

메타 데이터에서 메서드의 지역 변수를 설명 하는 서명에 대 한 메타 데이터 토큰을 가져옵니다.Gets a metadata token for the signature that describes the local variables for the method in metadata.

LocalVariables

메서드 본문에 선언 된 지역 변수의 목록을 가져옵니다.Gets the list of local variables declared in the method body.

MaxStackSize

메서드를 실행 중일 때 피연산자 스택에 항목의 최대 수를 가져옵니다.Gets the maximum number of items on the operand stack when the method is executing.

Methods

Equals(Object)

지정한 개체와 현재 개체가 같은지 여부를 확인합니다.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode()

기본 해시 함수로 작동합니다.Serves as the default hash function.

(Inherited from Object)
GetILAsByteArray()

메서드 본문의 MSIL 바이트의 배열로 반환합니다.Returns the MSIL for the method body, as an array of bytes.

GetType()

현재 인스턴스의 Type을 가져옵니다.Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone()

현재 Object의 단순 복사본을 만듭니다.Creates a shallow copy of the current Object.

(Inherited from Object)
ToString()

현재 개체를 나타내는 문자열을 반환합니다.Returns a string that represents the current object.

(Inherited from Object)

Applies to