Button.IPostBackEventHandler.RaisePostBackEvent(String) Método

  • Referencia

Definición

Espacio de nombres:
System.Web.UI.WebControls
Ensamblado:
System.Web.dll

Genera eventos para el control Button cuando devuelve datos al servidor.

 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

Parámetros

eventArgument
String

Argumento para el evento.

Implementaciones

RaisePostBackEvent(String)

Ejemplos

En el ejemplo de código siguiente se muestra cómo invalidar el IPostBackEventHandler.RaisePostBackEvent método para que siempre genere el OnClick evento en un control personalizado Button .

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

Comentarios

El control usa internamente Button este evento, cuando se hace clic en él, para generar un Click evento y, si se define, un Command evento.

Se aplica a

Consulte también