LogicalMethodInfo.GetCustomAttribute(Type) Methode

Referenz

Definition

Namespace:: System.Web.Services.Protocols

Assembly:: System.Web.Services.dll

Wichtig

Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.

Gibt das erste dem Typ zugewiesene benutzerdefinierte Attribut zurück, sofern diesem benutzerdefinierte Attribute zugewiesen sind.

public:
 System::Object ^ GetCustomAttribute(Type ^ type);

public object GetCustomAttribute (Type type);

member this.GetCustomAttribute : Type -> obj

Public Function GetCustomAttribute (type As Type) As Object

Parameter

type: Type

Der Type, dem die benutzerdefinierten Attribute zugewiesen sind.

Gibt zurück

Object

Ein Object mit dem ersten benutzerdefinierten Attribut, das dem type-Parameter zugewiesen ist.

Ausnahmen

TypeLoadException

Der benutzerdefinierte Attributtyp kann nicht geladen werden.

Beispiele

#using <System.Web.Services.dll>

using namespace System;
using namespace System::Reflection;
using namespace System::Web::Services::Protocols;

// Define a custom attribute with one named parameter.

[AttributeUsage(AttributeTargets::Method|AttributeTargets::ReturnValue,
AllowMultiple=true)]
public ref class MyAttribute: public Attribute
{
private:
   String^ myName;

public:
   MyAttribute( String^ name )
   {
      myName = name;
   }

   property String^ Name 
   {
      String^ get()
      {
         return myName;
      }
   }
};

public ref class MyService
{
public:

   [MyAttribute("This is the first sample attribute")]
   [MyAttribute("This is the second sample attribute")]
   [returnvalue:MyAttribute("This is the return sample attribute")]
   int Add( int xValue, int yValue )
   {
      return (xValue + yValue);
   }
};

int main()
{
   Type^ myType = MyService::typeid;
   MethodInfo^ myMethodInfo = myType->GetMethod( "Add" );

   // Create a synchronous 'LogicalMethodInfo' instance.
   array<MethodInfo^>^temparray = {myMethodInfo};
   LogicalMethodInfo^ myLogicalMethodInfo = (LogicalMethodInfo::Create( temparray, LogicalMethodTypes::Sync ))[ 0 ];

   // Display the method for which the attributes are being displayed.
   Console::WriteLine( "\nDisplaying the attributes for the method : {0}\n", myLogicalMethodInfo->MethodInfo );

   // Displaying a custom attribute of type 'MyAttribute'
   Console::WriteLine( "\nDisplaying attribute of type 'MyAttribute'\n" );
   Object^ attribute = myLogicalMethodInfo->GetCustomAttribute( MyAttribute::typeid );
   Console::WriteLine( (dynamic_cast<MyAttribute^>(attribute))->Name );

   // Display all custom attribute of type 'MyAttribute'.
   Console::WriteLine( "\nDisplaying all attributes of type 'MyAttribute'\n" );
   array<Object^>^attributes = myLogicalMethodInfo->GetCustomAttributes( MyAttribute::typeid );
   for ( int i = 0; i < attributes->Length; i++ )
      Console::WriteLine( (dynamic_cast<MyAttribute^>(attributes[ i ]))->Name );

   // Display all return attributes of type 'MyAttribute'.
   Console::WriteLine( "\nDisplaying all return attributes of type 'MyAttribute'\n" );
   ICustomAttributeProvider^ myCustomAttributeProvider = myLogicalMethodInfo->ReturnTypeCustomAttributeProvider;
   if ( myCustomAttributeProvider->IsDefined( MyAttribute::typeid, true ) )
   {
      attributes = myCustomAttributeProvider->GetCustomAttributes( true );
      for ( int i = 0; i < attributes->Length; i++ )
         if ( attributes[ i ]->GetType()->Equals( MyAttribute::typeid ) )
                  Console::WriteLine( (dynamic_cast<MyAttribute^>(attributes[ i ]))->Name );
   }

   // Display all the custom attributes of type 'MyAttribute'.
   Console::WriteLine( "\nDisplaying all attributes of type 'MyAttribute'\n" );
   myCustomAttributeProvider = myLogicalMethodInfo->CustomAttributeProvider;
   if ( myCustomAttributeProvider->IsDefined( MyAttribute::typeid, true ) )
   {
      attributes = myCustomAttributeProvider->GetCustomAttributes( true );
      for ( int i = 0; i < attributes->Length; i++ )
         if ( attributes[ i ]->GetType()->Equals( MyAttribute::typeid ) )
                  Console::WriteLine( (dynamic_cast<MyAttribute^>(attributes[ i ]))->Name );
   }
}

using System;
using System.Reflection;
using System.Web.Services.Protocols;

// Define a custom attribute with one named parameter.
[AttributeUsage(AttributeTargets.Method | AttributeTargets.ReturnValue, AllowMultiple=true)]
public class MyAttribute : Attribute
{
   private string myName;
   public MyAttribute(string name)
   {
      myName = name;
   }
   public string Name
   {
      get
      {
         return myName;
      }
   }
}

public class MyService
{
   [MyAttribute("This is the first sample attribute")]
   [MyAttribute("This is the second sample attribute")]
   [return: MyAttribute("This is the return sample attribute")]
   public int Add(int xValue, int yValue)
   {
      return (xValue + yValue);
   }
}

public class LogicalMethodInfo_GetCustomAttribute
{
   public static void Main()
   {
      Type myType = typeof(MyService);
      MethodInfo myMethodInfo = myType.GetMethod("Add");
      // Create a synchronous 'LogicalMethodInfo' instance.
      LogicalMethodInfo myLogicalMethodInfo =
         (LogicalMethodInfo.Create(new MethodInfo[] {myMethodInfo},
                                   LogicalMethodTypes.Sync))[0];
      // Display the method for which the attributes are being displayed.
      Console.WriteLine("\nDisplaying the attributes for the method : {0}\n",
                           myLogicalMethodInfo.MethodInfo);

      // Displaying a custom attribute of type 'MyAttribute'
      Console.WriteLine("\nDisplaying attribute of type 'MyAttribute'\n");
      object attribute = myLogicalMethodInfo.GetCustomAttribute(typeof(MyAttribute));
      Console.WriteLine(((MyAttribute)attribute).Name);

      // Display all custom attribute of type 'MyAttribute'.
      Console.WriteLine("\nDisplaying all attributes of type 'MyAttribute'\n");
      object[] attributes = myLogicalMethodInfo.GetCustomAttributes(typeof(MyAttribute));
      for(int i = 0; i < attributes.Length; i++)
         Console.WriteLine(((MyAttribute)attributes[i]).Name);

      // Display all return attributes of type 'MyAttribute'.
      Console.WriteLine("\nDisplaying all return attributes of type 'MyAttribute'\n");
      ICustomAttributeProvider myCustomAttributeProvider =
                  myLogicalMethodInfo.ReturnTypeCustomAttributeProvider;
      if(myCustomAttributeProvider.IsDefined(typeof(MyAttribute), true))
      {
         attributes = myCustomAttributeProvider.GetCustomAttributes(true);
         for(int i = 0; i < attributes.Length; i++)
            if(attributes[i].GetType().Equals(typeof(MyAttribute)))
               Console.WriteLine(((MyAttribute)attributes[i]).Name);
      }

      // Display all the custom attributes of type 'MyAttribute'.
      Console.WriteLine("\nDisplaying all attributes of type 'MyAttribute'\n");
      myCustomAttributeProvider = myLogicalMethodInfo.CustomAttributeProvider;
      if(myCustomAttributeProvider.IsDefined(typeof(MyAttribute), true))
      {
         attributes = myCustomAttributeProvider.GetCustomAttributes(true);
         for(int i = 0; i < attributes.Length; i++)
            if(attributes[i].GetType().Equals(typeof(MyAttribute)))
               Console.WriteLine(((MyAttribute)attributes[i]).Name);
      }
   }
}

Imports System.Reflection
Imports System.Web.Services.Protocols

' Define a custom attribute with one named parameter.
<AttributeUsage(AttributeTargets.Method Or AttributeTargets.ReturnValue, AllowMultiple := True)>  _
Public Class MyAttribute
   Inherits Attribute

   Private myName As String
   
   Public Sub New(name As String)
      myName = name
   End Sub
   
   Public ReadOnly Property Name() As String
      Get
         Return myName
      End Get
   End Property
End Class

Public Class MyService
   
<MyAttribute("This is the first sample attribute"), MyAttribute("This is the second sample attribute")>  _
   Public Function Add(xValue As Integer, yValue As Integer)  _
                 As<MyAttribute("This is the return sample attribute")> Integer
      Return xValue + yValue
   End Function 'Add
End Class


Public Class LogicalMethodInfo_GetCustomAttribute
   
   Public Shared Sub Main()
      Dim myType As Type = GetType(MyService)
      Dim myMethodInfo As MethodInfo = myType.GetMethod("Add")
      ' Create a synchronous 'LogicalMethodInfo' instance.
      Dim myLogicalMethodInfo As LogicalMethodInfo = _
                 LogicalMethodInfo.Create(New MethodInfo() {myMethodInfo}, LogicalMethodTypes.Sync)(0)
      ' Display the method for which the attributes are being displayed.
      Console.WriteLine(ControlChars.NewLine + "Displaying the attributes for the method : {0}" + _
                 ControlChars.NewLine, myLogicalMethodInfo.MethodInfo.ToString())
      
      ' Displaying a custom attribute of type 'MyAttribute'
      Console.WriteLine(ControlChars.NewLine + "Displaying attribute of type 'MyAttribute'" + _
                 ControlChars.NewLine)
      Dim attribute As Object = myLogicalMethodInfo.GetCustomAttribute(GetType(MyAttribute))
      Console.WriteLine(CType(attribute, MyAttribute).Name)
      
      ' Display all custom attribute of type 'MyAttribute'.
      Console.WriteLine(ControlChars.NewLine + "Displaying all attributes of type 'MyAttribute'" + _
                 ControlChars.NewLine)
      Dim attributes As Object() = myLogicalMethodInfo.GetCustomAttributes(GetType(MyAttribute))
      Dim i As Integer
      For i = 0 To attributes.Length - 1
         Console.WriteLine(CType(attributes(i), MyAttribute).Name)
      Next i 
      ' Display all return attributes of type 'MyAttribute'.
      Console.WriteLine(ControlChars.NewLine + "Displaying all return attributes of type 'MyAttribute'" + _
                 ControlChars.NewLine)
      Dim myCustomAttributeProvider As ICustomAttributeProvider = _
                 myLogicalMethodInfo.ReturnTypeCustomAttributeProvider
      If myCustomAttributeProvider.IsDefined(GetType(MyAttribute), True) Then
         attributes = myCustomAttributeProvider.GetCustomAttributes(True)

         For i = 0 To attributes.Length - 1
            If attributes(i).GetType().Equals(GetType(MyAttribute)) Then
               Console.WriteLine(CType(attributes(i), MyAttribute).Name)
            End If
         Next i 
      End If ' Display all the custom attributes of type 'MyAttribute'.
      Console.WriteLine(ControlChars.NewLine + "Displaying all attributes of type 'MyAttribute'" + _
                 ControlChars.NewLine)
      myCustomAttributeProvider = myLogicalMethodInfo.CustomAttributeProvider
      If myCustomAttributeProvider.IsDefined(GetType(MyAttribute), True) Then
         attributes = myCustomAttributeProvider.GetCustomAttributes(True)

         For i = 0 To attributes.Length - 1
            If attributes(i).GetType().Equals(GetType(MyAttribute)) Then
               Console.WriteLine(CType(attributes(i), MyAttribute).Name)
            End If
         Next i
      End If
   End Sub
End Class

Gilt für

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