CallingConventions 列舉

定義

命名空間:

System.Reflection

組件:

System.Runtime.dll

定義方法的有效呼叫慣例。

此列舉支援其成員值的位元組合。

public enum class CallingConventions

[System.Flags]
public enum CallingConventions

[<System.Flags>]
type CallingConventions = 

Public Enum CallingConventions

繼承

Object

ValueType

Enum

CallingConventions

屬性

FlagsAttribute

欄位

Any	3	指定可能會使用 Standard 還是 VarArgs 呼叫慣例。
ExplicitThis	64	指定簽章為函式指標簽章，表示呼叫執行個體或虛擬方法 (非靜態方法)。 如果設定 ExplicitThis，也必須設定 HasThis。 傳遞至呼叫方法的第一個引數仍是 this 指標，但第一個引數的型別目前未知。 因此，描述 this 指標之型別 (或類別) 的語彙基元會明確地儲存到它的中繼資料 (Metadata) 簽章中。
HasThis	32	指定執行個體或虛擬方法 (非靜態的方法)。 在執行階段期間，呼叫的方法傳遞指標至目標物件做為它的第一個引數 (this 指標)。 儲存在中繼資料的簽章並不包含這第一個引數的型別，因為已知方法，而且其擁有人類別可以從中繼資料找到。
Standard	1	指定如同 Common Language Runtime 所判斷的預設呼叫慣例。 靜態方法要使用此呼叫慣例。 若為執行個體或虛擬方法，則需使用 HasThis。
VarArgs	2	指定有變數引數之方法的呼叫慣例。

範例

using namespace System;
using namespace System::Reflection;
using namespace System::Security;
public ref class MyClass1
{
public:
   MyClass1( int i ){}

};

int main()
{
   try
   {
      Type^ myType = MyClass1::typeid;
      array<Type^>^types = gcnew array<Type^>(1);
      types[ 0 ] = int::typeid;
      
      // Get the public instance constructor that takes an integer parameter.
      ConstructorInfo^ constructorInfoObj = myType->GetConstructor( static_cast<BindingFlags>(BindingFlags::Instance | BindingFlags::Public), nullptr, CallingConventions::HasThis, types, nullptr );
      if ( constructorInfoObj != nullptr )
      {
         Console::WriteLine( "The constructor of MyClass1 that is a public instance method and takes an integer as a parameter is: " );
         Console::WriteLine( constructorInfoObj );
      }
      else
      {
         Console::WriteLine( "The constructor of MyClass1 that is a public instance method and takes an integer as a parameter is not available." );
      }
   }
   catch ( ArgumentNullException^ e ) 
   {
      Console::WriteLine( "ArgumentNullException: {0}", e->Message );
   }
   catch ( ArgumentException^ e ) 
   {
      Console::WriteLine( "ArgumentException: {0}", e->Message );
   }
   catch ( SecurityException^ e ) 
   {
      Console::WriteLine( "SecurityException: {0}", e->Message );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception: {0}", e->Message );
   }
}

using System;
using System.Reflection;
using System.Security;

public class MyClass3
{
    public MyClass3(int i) { }
    public static void Main()
    {
        try
        {
            Type myType = typeof(MyClass3);
            Type[] types = new Type[1];
            types[0] = typeof(int);
            // Get the public instance constructor that takes an integer parameter.
            ConstructorInfo constructorInfoObj = myType.GetConstructor(
                BindingFlags.Instance | BindingFlags.Public, null,
                CallingConventions.HasThis, types, null);
            if (constructorInfoObj != null)
            {
                Console.WriteLine("The constructor of MyClass3 that is a public " +
                    "instance method and takes an integer as a parameter is: ");
                Console.WriteLine(constructorInfoObj.ToString());
            }
            else
            {
                Console.WriteLine("The constructor of MyClass3 that is a public instance " +
                    "method and takes an integer as a parameter is not available.");
            }
        }
        catch (ArgumentNullException e)
        {
            Console.WriteLine("ArgumentNullException: " + e.Message);
        }
        catch (ArgumentException e)
        {
            Console.WriteLine("ArgumentException: " + e.Message);
        }
        catch (SecurityException e)
        {
            Console.WriteLine("SecurityException: " + e.Message);
        }
        catch (Exception e)
        {
            Console.WriteLine("Exception: " + e.Message);
        }
    }
}

Public Class MyClass1
    Public Sub New(ByVal i As Integer)
    End Sub
    Public Shared Sub Main()
        Try
            Dim myType As Type = GetType(MyClass1)
            Dim types(0) As Type
            types(0) = GetType(Integer)
            ' Get the public instance constructor that takes an integer parameter.
            Dim constructorInfoObj As ConstructorInfo = _
                        myType.GetConstructor(BindingFlags.Instance Or _
                        BindingFlags.Public, Nothing, _
                        CallingConventions.HasThis, types, Nothing)
            If Not (constructorInfoObj Is Nothing) Then
                Console.WriteLine("The constructor of MyClass1 that " + _
                                  "is a public instance method and takes an " + _
                                  "integer as a parameter is: ")
                Console.WriteLine(constructorInfoObj.ToString())
            Else
                Console.WriteLine("The constructor MyClass1 that " + _
                                  "is a public instance method and takes an " + _
                                  "integer as a parameter is not available.")
            End If
        Catch e As ArgumentNullException
            Console.WriteLine("ArgumentNullException: " + e.Message)
        Catch e As ArgumentException
            Console.WriteLine("ArgumentException: " + e.Message)
        Catch e As SecurityException
            Console.WriteLine("SecurityException: " + e.Message)
        Catch e As Exception
            Console.WriteLine("Exception: " + e.Message)
        End Try
    End Sub
End Class

備註

原生呼叫慣例是一組規則，可控管傳遞至已編譯方法之自變數的順序和配置。 它也會控管如何傳遞傳回值、要用於自變數的緩存器，以及呼叫或呼叫方法是否會從堆疊中移除自變數。