Page.GetPostBackEventReference メソッド (Control)

クライアント側のスクリプト関数への参照を取得します。この関数が呼び出されると、サーバーがページにポスト バックします。

Overloads Public Function GetPostBackEventReference( _
   ByVal control As Control _) As String
[C#]
public string GetPostBackEventReference(Controlcontrol);
[C++]
public: String* GetPostBackEventReference(Control* control);
[JScript]
public function GetPostBackEventReference(
   control : Control) : String;

パラメータ

• control
  サーバー上でポストバックを処理するサーバー コントロール。

戻り値

クライアント側のイベント ハンドラに挿入できる、クライアント側の関数呼び出しのテキスト。

使用例

 
Public Class MyControl1
   Inherits Control
   Implements IPostBackEventHandler 'ToDo: Add Implements Clauses for implementation methods of these interface(s)
   
   ' Create an integer property that is displayed when
   ' the page that contains this control is requested
   ' and save it to the control's ViewState property.
   Public Property Number() As Integer
      Get
         If Not (ViewState("Number") Is Nothing) Then
            Return CInt(ViewState("Number"))
         End If
         Return 50
      End Get
      
      Set
         ViewState("Number") = value
      End Set
   End Property
   

   ' Implement the RaisePostBackEvent method from the
   ' IPostBackEventHandler interface. If inc is passed
   ' to this method, it increases the Number property by one.      
   Public Sub RaisePostBackEvent(eventArgument As String) Implements IPostBackEventHandler.RaisePostBackEvent

      Number = Number + 1
   End Sub 'RaisePostBackEvent
   
   <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
   Protected Overrides Sub Render(writer As HtmlTextWriter)
      ' Converts the Number property to a string and
  ' writes it to the containing page.
      writer.Write(("The Number is " + Number.ToString() + " ("))

  ' Uses the GetPostBackEventReference method to pass
  ' inc to the RaisePostBackEvent method when the link
  ' this code creates is clicked.         
      writer.Write(("<a href=""javascript:" + Page.GetPostBackEventReference(Me) + """>Increase Number</a>"))
   End Sub 'Render
End Class 'MyControl1

[C#] 
public class MyControl1 : Control, IPostBackEventHandler
{
   // Create an integer property that is displayed when
   // the page that contains this control is requested
   // and save it to the control's ViewState property.
   public int Number
   {
     get
     {
       if ( ViewState["Number"] !=null )
       return (int) ViewState["Number"];
       return 50;
     }

     set
     {
       ViewState["Number"] = value;
     }        
   }

   // Implement the RaisePostBackEvent method from the
   // IPostBackEventHandler interface. If 'inc' is passed
   // to this method, it increases the Number property by one.
   public void RaisePostBackEvent(string eventArgument)
   {
     Number = Number + 1;
   }

   
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
   protected override void Render(HtmlTextWriter writer)
   {
     // Converts the Number property to a string and
 // writes it to the containing page.
     writer.Write("The Number is " + Number.ToString() + " (" );

 // Uses the GetPostBackEventReference method to pass
 // 'inc' to the RaisePostBackEvent method when the link
 // this code creates is clicked.
     writer.Write("<a href=\"javascript:" + Page.GetPostBackEventReference(this) + "\">Increase Number</a>");
   }
}

[C++] 
public __gc class MyControl1 : 
   public Control, public IPostBackEventHandler
{
   // Create an integer property that is displayed when
   // the page that contains this control is requested
   // and save it to the control's ViewState property.
public:
   __property int get_Number() 
   {
      if (ViewState->get_Item(S"Number") !=0)
         return * dynamic_cast<__box int*>(ViewState->get_Item(S"Number"));
      return 50;
   }

   __property void set_Number(int value) 
   {
      ViewState->Item[S"Number"] = __box(value);
   }

   // Implement the RaisePostBackEvent method from the
   // IPostBackEventHandler* interface. If 'inc' is passed
   // to this method, it increases the Number property by one.
   void RaisePostBackEvent(String* eventArgument)
   {
      Number = Number + 1;
   }

protected:
   [System::Security::Permissions::PermissionSet(System::Security::Permissions::SecurityAction::Demand, Name="FullTrust")]
   void Render(HtmlTextWriter * writer)
   {
      // Converts the Number property to a String* and
      // writes it to the containing page.
      writer->Write(S"The Number is {0} (", __box(Number));

      // Uses the GetPostBackEventReference method to pass
      // 'inc' to the RaisePostBackEvent method when the link
      // this code creates is clicked.
      writer->Write(S"<a href=\"javascript:{0}\">Increase Number</a>", 
         Page->GetPostBackEventReference(this));
   }
};

[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタ ボタン をクリックします。

必要条件

プラットフォーム: Windows 2000, Windows XP Professional, Windows Server 2003 ファミリ

参照

Page クラス | Page メンバ | System.Web.UI 名前空間 | Page.GetPostBackEventReference オーバーロードの一覧