LogicalMethodInfo.GetCustomAttribute-Methode

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

Namespace: System.Web.Services.Protocols
Assembly: System.Web.Services (in system.web.services.dll)

Syntax

'Declaration
Public Function GetCustomAttribute ( _
    type As Type _
) As Object
'Usage
Dim instance As LogicalMethodInfo
Dim type As Type
Dim returnValue As Object

returnValue = instance.GetCustomAttribute(type)

public Object GetCustomAttribute (
    Type type
)

public:
Object^ GetCustomAttribute (
    Type^ type
)

public Object GetCustomAttribute (
    Type type
)

public function GetCustomAttribute (
    type : Type
) : Object

Parameter

• type
  Der Type, dem die benutzerdefinierten Attribute zugewiesen sind.

Rückgabewert

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

Ausnahmen

Ausnahmetyp	Bedingung
TypeLoadException	Der benutzerdefinierte Attributtyp kann nicht geladen werden.

Beispiel

Imports System
Imports System.Reflection
Imports System.Web.Services.Protocols
Imports MicroSoft.VisualBasic

' 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 'New
   
   Public ReadOnly Property Name() As String
      Get
         Return myName
      End Get
   End Property
End Class 'MyAttribute

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 'MyService


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 'Main 
End Class 'LogicalMethodInfo_GetCustomAttribute

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);
      }
   }
}

#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 );
   }
}

import System.*;
import System.Reflection.*;
import System.Web.Services.Protocols.*;

// Define a custom attribute with one named parameter.
/** @attribute AttributeUsage(AttributeTargets.Method 
    | AttributeTargets.ReturnValue, AllowMultiple = true)
 */
public class MyAttribute extends Attribute
{
    private String myName;

    public MyAttribute(String name)
    {
        myName = name;
    } //MyAttribute

    /** @property 
     */
    public String get_Name()
    {
        return myName;
    } //get_Name
} //MyAttribute

public class MyService
{
    /** @attribute MyAttribute("This is the first sample attribute")
     */
    /** @attribute MyAttribute("This is the second sample attribute")
     */
    /** @attribute.return MyAttribute("This is the return sample attribute")
     */
    public int Add(int xValue, int yValue)
    {
        return xValue + yValue;
    } //Add
} //MyService

public class LogicalMethodInfo_GetCustomAttribute
{
    public static void main(String[] args)
    {
        Type myType = MyService.class.ToType();
        MethodInfo myMethodInfo = myType.GetMethod("Add");

        // Create a synchronous 'LogicalMethodInfo' instance.
        LogicalMethodInfo myLogicalMethodInfo = 
            (LogicalMethodInfo)LogicalMethodInfo.Create(new MethodInfo[] 
            { myMethodInfo }, LogicalMethodTypes.Sync).get_Item(0);

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

        // Displaying a custom attribute of type 'MyAttribute'
        Console.WriteLine("\nDisplaying attribute of type 'MyAttribute'\n");
        Object attribute = myLogicalMethodInfo.GetCustomAttribute(
            MyAttribute.class.ToType());
        Console.WriteLine(((MyAttribute)attribute).get_Name());

        // Display all custom attribute of type 'MyAttribute'.
        Console.WriteLine("\nDisplaying all attributes of type "
            + "'MyAttribute'\n");
        Object attributes[] = 
            myLogicalMethodInfo.GetCustomAttributes(MyAttribute.class.ToType());
        for (int i = 0; i < attributes.length; i++) {
            Console.WriteLine(((MyAttribute)attributes.get_Item(i)).get_Name());
        }
        // Display all return attributes of type 'MyAttribute'.
        Console.WriteLine("\nDisplaying all return attributes "
            + "of type 'MyAttribute'\n");
        ICustomAttributeProvider myCustomAttributeProvider = 
            myLogicalMethodInfo.get_ReturnTypeCustomAttributeProvider();
        if (myCustomAttributeProvider.IsDefined(MyAttribute.class.ToType(), 
            true)) {
            attributes = myCustomAttributeProvider.GetCustomAttributes(true);
            for (int i = 0; i < attributes.length; i++) {
                if (attributes.get_Item(i).GetType().
                    Equals(MyAttribute.class.ToType())) {
                    Console.WriteLine(((MyAttribute)(attributes.get_Item(i))).
                        get_Name());
                }
            }
        }

        // Display all the custom attributes of type 'MyAttribute'.
        Console.WriteLine("\nDisplaying all attributes of type 'MyAttribute'\n");
        myCustomAttributeProvider = 
            myLogicalMethodInfo.get_CustomAttributeProvider();
        if (myCustomAttributeProvider.IsDefined(MyAttribute.class.ToType(), 
            true)) {
            attributes = myCustomAttributeProvider.GetCustomAttributes(true);
            for (int i = 0; i < attributes.length; i++) {
                if (attributes.get_Item(i).GetType().
                    Equals(MyAttribute.class.ToType())) {
                    Console.WriteLine(((MyAttribute)attributes.get_Item(i)).
                        get_Name());
                }
            }
        }
    } //main
} //LogicalMethodInfo_GetCustomAttribute

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

.NET Compact Framework

Unterstützt in: 2.0, 1.0

Siehe auch

Referenz

LogicalMethodInfo-Klasse
LogicalMethodInfo-Member
System.Web.Services.Protocols-Namespace