Button.IPostBackEventHandler.RaisePostBackEvent(String) Metoda

Definice

Vyvolá události pro Button ovládací prvek při odeslání zpět na server.

 virtual void System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(System::String ^ eventArgument) = System::Web::UI::IPostBackEventHandler::RaisePostBackEvent;
void IPostBackEventHandler.RaisePostBackEvent (string eventArgument);
abstract member System.Web.UI.IPostBackEventHandler.RaisePostBackEvent : string -> unit
override this.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent : string -> unit
Sub RaisePostBackEvent (eventArgument As String) Implements IPostBackEventHandler.RaisePostBackEvent

Parametry

eventArgument
String

Argument události.

Implementuje

Příklady

Následující příklad kódu ukazuje, jak přepsat metodu IPostBackEventHandler.RaisePostBackEvent tak, aby vždy vyvolala OnClick událost ve vlastním Button ovládacím prvku.

namespace Samples.AspNet.CS.Controls
{
  [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
  public class CustomButtonRaisePostBackEvent : System.Web.UI.WebControls.Button, System.Web.UI.IPostBackEventHandler
  {
    private string message = System.String.Empty;

    protected override void Render(System.Web.UI.HtmlTextWriter writer) 
    {
      // Render a HTML submit button.
      writer.Write("<INPUT TYPE='submit' name='" + this.UniqueID + "' value='Click Me' />"); 
      writer.Write("<BR>" + message);
    }
    
    // Re-implement the IPostBackEventHandler's RaisePostBackEvent method.
    // Note: C# allows this, where VB.NET does not.
    public void RaisePostBackEvent(System.String eventArgument)
    {
      // Raise the Click event of the custom Button web control.
      OnClick(new System.EventArgs());

      // Don't call the Page.Validate or OnCommand events,
      // which the base IPostBackEventHandler's RaisePostBackEvent method does.
    }

    protected override void OnClick(System.EventArgs e)
    {
      message = "RaisePostBackEvent method successful!";
    }
  }
}
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Public Class CustomButtonRaisePostBackEvent
    Inherits System.Web.UI.WebControls.Button

    Private message As String = System.String.Empty

    Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter)
        ' Render a HTML submit button.
        writer.Write("<INPUT TYPE='submit' name='" + Me.UniqueID + "' value='Click Me' />")
        writer.Write("<BR>" + message)
    End Sub

    ' Note: VB.NET does not allow one to re-implement a base class interface, whereas C# does.
    ' Hence, just use the base class's PostBackEventHandler's RaisePostBackEvent method,
    ' which calls the OnClick method.

    Protected Overrides Sub OnClick(ByVal e As System.EventArgs)
        message = "RaisePostBackEvent method successful!"
    End Sub
End Class

Poznámky

Tuto událost používá ovládací prvek interně Button , když na ni kliknete, k vyvolání Click události, a pokud je událost definovaná Command .

Platí pro

Viz také