ControlBuilder.OnAppendToParentBuilder(ControlBuilder) Método

Definición

Espacio de nombres:

System.Web.UI

Ensamblado:

System.Web.dll

Notifica el ControlBuilder que se agrega a un generador de controles principales.

public:
 virtual void OnAppendToParentBuilder(System::Web::UI::ControlBuilder ^ parentBuilder);

public virtual void OnAppendToParentBuilder (System.Web.UI.ControlBuilder parentBuilder);

abstract member OnAppendToParentBuilder : System.Web.UI.ControlBuilder -> unit
override this.OnAppendToParentBuilder : System.Web.UI.ControlBuilder -> unit

Public Overridable Sub OnAppendToParentBuilder (parentBuilder As ControlBuilder)

Parámetros

parentBuilder

ControlBuilder

Objeto ControlBuilder al que se agrega el generador actual.

Ejemplos

En este ejemplo se invalida el OnAppendToParentBuilder método para comprobar la ControlType propiedad para determinar a qué tipo de control se aplica este generador. Si es , CustomTextBoxel generador comprueba si el valor de la HasAspCode propiedad se incluye en el control . Si es así, se produce una excepción, si no se llama al HasBody método .

using System;
using System.Web.UI;
using System.Web;
using System.Security.Permissions;

namespace ASPNET.Samples
{
    [
    AspNetHostingPermission(SecurityAction.Demand,
        Level=AspNetHostingPermissionLevel.Minimal)
    ]
    public class AppendControlBuilder : ControlBuilder
    {
        // Override the OnAppendToParentBuilder method.
        public override void OnAppendToParentBuilder(ControlBuilder parentBuilder)
        {
            // Check whether the type of the control this builder
            // is applied to is CustomTextBox. If so, check whether
            // ASP code blocks exist in the control. If so, call
            // throw an Exception, if not, call the HasBody method.        
            if (ControlType == Type.GetType("CustomTextBox"))
            {
                if (HasAspCode)
                    throw new Exception("This control cannot contain code blocks.");
                else
                    HasBody();
            }
        }
    }
}

Imports System.Web.UI
Imports System.Web
Imports System.Security.Permissions

Namespace ASPNET.Samples

   <AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
   Public NotInheritable Class AppendControlBuilder
      Inherits ControlBuilder

      ' Override the OnAppendToParentBuilder method.
      Overrides Public Sub OnAppendToParentBuilder( _
         ByVal parentBuilder As ControlBuilder _
      )
            ' Check whether the type of the control this builder
            ' is applied to is CustomTextBox. If so, check whether
            ' ASP code blocks exist in the control. If so, call
            ' throw an Exception, if not, call the HasBody method.        
            If ControlType Is Type.GetType("CustomTextBox") Then
                If HasAspCode = True Then
                    Throw New Exception("This control cannot contain code blocks.")
                Else
                    HasBody()
                End If
            End If

        End Sub

   End Class

End Namespace