ObsoleteAttribute.IsError プロパティ

.NET Framework クラス ライブラリ リファレンス

ObsoleteAttribute.IsError プロパティ

今後使用しないとマークしたプログラム要素が使用された場合に、コンパイラでエラーとして処理するかどうかを示す Boolean 値を取得します。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Public ReadOnly Property
 IsError As Boolean

Visual Basic (使用法)

Dim instance As ObsoleteAttribute
Dim value As Boolean

value = instance.IsError

C#

public bool IsError { get;
 }

C++

public:
property bool IsError {
    bool get ();
}

J#

/** @property */
public boolean get_IsError ()

JScript

public function get IsError
 () : boolean

プロパティ値
今後使用しないとマークした要素を使用するとエラーと見なす場合は true。それ以外の場合は false。既定値は false です。

使用例

Visual Basic

Imports System
Imports System.ComponentModel
Imports Microsoft.VisualBasic



Public Class ObsoleteAttribute_Message
   
   ' Mark the property as 'Obsolete' with message and IsError as parameters.
   
<ObsoleteAttribute("This property will be removed from
 future Versions.Use another property 'MyNewProperty'",
 False)> _
   Public ReadOnly Property
 MyOldProperty() As String
      Get
         Return "This is the value of the property"
      End Get
   End Property
   ' Create another property.
   
   Public ReadOnly Property
 MyNewProperty() As String
      Get
         Return "This is the value of the new
 property"
      End Get
   End Property
   
   
   ' Get the Properties of the 'ObsoleteAttribute'.  
   Public Sub GetPropertyAttributes()
      ' Retrieve all the attributes.
      Dim attributes As AttributeCollection
 = TypeDescriptor.GetProperties(Me)("MyOldProperty").Attributes
      
      Dim myAttribute As ObsoleteAttribute
 = CType(attributes(GetType(ObsoleteAttribute)), ObsoleteAttribute)
      Console.WriteLine(("The Message of the ObsoleteAttribute
 is :" + ControlChars.Cr + myAttribute.Message))
      Console.WriteLine(("Usage of Obsolete as error is :"
 + myAttribute.IsError.ToString()))
   End Sub 'GetPropertyAttributes
   
   'Entry point which delegates to C-style main Private Function
   Public Overloads Shared
 Sub Main()
      Main(System.Environment.GetCommandLineArgs())
   End Sub
   
   
   Overloads Shared Sub
 Main(args() As String)
      
      Try
         Dim myObsolete As New
 ObsoleteAttribute_Message()
         Console.WriteLine(("The Message of Old Property is :"
 + myObsolete.MyOldProperty))
         Console.WriteLine(("The Message of New Property is :"
 + myObsolete.MyNewProperty))
         Console.WriteLine(ControlChars.Cr + "The Values of ObsoleteAttribute
 are:")
         myObsolete.GetPropertyAttributes()
      
      Catch e As Exception
         Console.WriteLine(("The Exception is :" +
 e.Message.ToString()))
      End Try
   End Sub 'Main 
End Class 'ObsoleteAttribute_Message

C#

using System;
using System.ComponentModel;

public class ObsoleteAttribute_Message
{
// Mark the property as 'Obsolete' with message and IsError as parameters.
[ObsoleteAttribute("This property will be removed from future Versions.Use another
 property 'MyNewProperty'",false)]
   public string MyOldProperty 
   {
      get 
      {
         return "This is the value of the property";
      }
   }
   // Create another property.
   public string MyNewProperty 
   {
      get 
      {
         return "This is the value of the new
 property";
      }
   }


// Get the Properties of the 'ObsoleteAttribute'.  
public void GetPropertyAttributes()
{
   // Retrieve all the attributes.
   AttributeCollection attributes = TypeDescriptor.GetProperties(this)["MyOldProperty"].Attributes;
       
   ObsoleteAttribute myAttribute = (ObsoleteAttribute)attributes[typeof(ObsoleteAttribute)];
   Console.WriteLine("The Message of the ObsoleteAttribute is :\n"+myAttribute.Message);
   Console.WriteLine("Usage of Obsolete as error is :"+myAttribute.IsError);
}
}

public class TestObsolete4
{
   static void Main(string[]
 args)
   {                 
      try
      {
         ObsoleteAttribute_Message myObsolete = new ObsoleteAttribute_Message();
         Console.WriteLine("The Message of Old Property is :"+myObsolete.MyOldProperty);
         Console.WriteLine("The Message of New Property is :"+myObsolete.MyNewProperty);
         myObsolete.GetPropertyAttributes();
      }
      catch(Exception e)
      {
         Console.WriteLine("The Exception is :"+e.Message);
      }                     
   } 

}

C++

#using <system.dll>

using namespace System;
using namespace System::ComponentModel;

public ref class ObsoleteAttribute_Message
{
public:

   property String^ MyOldProperty 
   {
      // Mark the property as 'Obsolete' with message and IsError as
 parameters.

      [ObsoleteAttribute("This property will be removed from future Versions.
 Use another property 'MyNewProperty'",false)]
      String^ get()
      {
         return "This is the value of the property";
      }
   }

   property String^ MyNewProperty 
   {
      // Create another property.
      String^ get()
      {
         return "This is the value of the new
 property";
      }
   }

   // Get the Properties of the 'ObsoleteAttribute'.  
   void GetPropertyAttributes()
   {
      // Retrieve all the attributes.
      AttributeCollection^ attributes = TypeDescriptor::GetProperties( this
 )[ "MyOldProperty" ]->Attributes;
      ObsoleteAttribute^ myAttribute = safe_cast<ObsoleteAttribute^>(attributes[
 ObsoleteAttribute::typeid ]);
      Console::WriteLine( "The Message of the ObsoleteAttribute is :\n {0}",
 myAttribute->Message );
      Console::WriteLine( "Usage of Obsolete as error is : {0}", myAttribute->IsError
 );
   }
};

int main()
{
   try
   {
      ObsoleteAttribute_Message^ myObsolete = gcnew ObsoleteAttribute_Message;
      Console::WriteLine( "The Message of Old Property is : {0}", myObsolete->MyOldProperty
 );
      Console::WriteLine( "The Message of New Property is : {0}", myObsolete->MyNewProperty
 );
      myObsolete->GetPropertyAttributes();
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "The Exception is : {0}", e->Message );
   }
}

J#

import System.*;
import System.ComponentModel.*;
public class ObsoleteAttribute_Message
{
    // Mark the property as 'Obsolete' with message and IsError as parameters.
    /** @attribute ObsoleteAttribute("This property will be removed from future"
        + "Versions.Use another property 'MyNewProperty'", false)
     */

    /** @property
     */
    public String get_MyOldProperty()
    {
        return "This is the value of the property";
    } //get_MyOldProperty

    // Create another property.
    
    /** @property 
     */
    public String get_MyNewProperty()
    {
        return "This is the value of the new
 property";
    } //get_MyNewProperty

    // Get the Properties of the 'ObsoleteAttribute'.  
    public void GetPropertyAttributes()
    {
        // Retrieve all the attributes.
        AttributeCollection attributes = TypeDescriptor.GetProperties(this).
            get_Item("MyOldProperty").get_Attributes();

        ObsoleteAttribute myAttribute = (ObsoleteAttribute)(attributes.
            get_Item(ObsoleteAttribute.class.ToType()));
        Console.WriteLine("The Message of the ObsoleteAttribute is :\n"
            + myAttribute.get_Message());
        Console.WriteLine("Usage of Obsolete as error is :" 
            + myAttribute.get_IsError());
    } //GetPropertyAttributes
} //ObsoleteAttribute_Message

public class TestObsolete4
{
    public static void main(String[]
 args)
    {
        try {
            ObsoleteAttribute_Message myObsolete = 
                new ObsoleteAttribute_Message();
            Console.WriteLine("The Message of Old Property is :" 
                + myObsolete.get_MyOldProperty());
            Console.WriteLine("The Message of New Property is :"
                + myObsolete.get_MyNewProperty());
            myObsolete.GetPropertyAttributes();
        }
        catch (System.Exception e) {
            Console.WriteLine("The Exception is :" + e.get_Message());
        }
    } //main
} //TestObsolete4

プラットフォーム

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

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
ObsoleteAttribute クラス
ObsoleteAttribute メンバ
System 名前空間