ControlBuilder.OnAppendToParentBuilder(ControlBuilder) Metode

Definisi

Ruang nama:

System.Web.UI

Rakitan:

System.Web.dll

Memberi tahu ControlBuilder bahwa file ditambahkan ke penyusun kontrol induk.

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)

Parameter

parentBuilder

ControlBuilder

Objek ControlBuilder tempat penyusun saat ini ditambahkan.

Contoh

Contoh ini mengambil alih OnAppendToParentBuilder metode untuk memeriksa ControlType properti untuk menentukan jenis kontrol apa yang diterapkan penyusun ini. Jika itu adalah CustomTextBox, penyusun memeriksa apakah nilai HasAspCode properti disertakan dalam kontrol. Jika demikian, pengecualian dilemparkan, jika tidak metode dipanggil HasBody .

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