Page.GetPostBackEventReference メソッド
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。
オーバーロードの一覧
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。
[Visual Basic] Overloads Public Function GetPostBackEventReference(Control) As String
[JScript] public function GetPostBackEventReference(Control) : String;
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。このメソッドも、サーバー上でポストバック処理を実行するサーバー コントロールにパラメータを渡します。
[Visual Basic] Overloads Public Function GetPostBackEventReference(Control, String) As String
[C#] public string GetPostBackEventReference(Control, string);
[C++] public: String* GetPostBackEventReference(Control*, String*);
[JScript] public function GetPostBackEventReference(Control, String) : String;
使用例
[Visual Basic, C#, C++] メモ ここでは、GetPostBackEventReference のオーバーロード形式のうちの 1 つだけについて、使用例を示します。その他の例については、各オーバーロード形式のトピックを参照してください。
Public Class MyControl
Inherits Control
Implements 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 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.
' If dec is passed to this method, it decreases the
' Number property by one.
Sub RaisePostBackEvent(eventArgument As String) Implements IPostBackEventHandler.RaisePostBackEvent
If eventArgument = "inc" Then
Number = Number + 1
End If
If eventArgument = "dec" Then
Number = Number - 1
End If
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, "inc") + """>Increase Number</a>"))
writer.Write(" or ")
' Uses the GetPostBackEventReference method to pass
' dec to the RaisePostBackEvent method when the link
' this code creates is clicked.
writer.Write(("<a href=""javascript:" + Page.GetPostBackEventReference(Me, "dec") + """>Decrease Number</a>"))
End Sub 'Render
End Class 'MyControl
[C#]
public class MyControl : 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.
// If 'dec' is passed to this method, it decreases the
// Number property by one.
public void RaisePostBackEvent(string eventArgument)
{
if ( eventArgument == "inc" )
Number = Number + 1;
if ( eventArgument == "dec" )
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,"inc") + "\">Increase Number</a>");
writer.Write(" or ");
// Uses the GetPostBackEventReference method to pass
// 'dec' to the RaisePostBackEvent method when the link
// this code creates is clicked.
writer.Write("<a href=\"javascript:" + Page.GetPostBackEventReference(this,"dec") + "\">Decrease Number</a>");
}
}
[C++]
public __gc class MyControl : 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.
// If 'dec' is passed to this method, it decreases the
// Number property by one.
void RaisePostBackEvent(String* eventArgument)
{
if (String::Compare(eventArgument, S"inc") == 0)
Number = Number + 1;
if (String::Compare(eventArgument, S"dec") == 0)
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,S"inc"));
writer->Write(S" or ");
// Uses the GetPostBackEventReference method to pass
// 'dec' to the RaisePostBackEvent method when the link
// this code creates is clicked.
writer->Write(S"<a href=\"javascript:S {0} \">Decrease Number</a>",
Page->GetPostBackEventReference(this, S"decS"));
}
};
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