ControlBuilder.HasAspCode 屬性

定義

命名空間:

System.Web.UI

組件:

System.Web.dll

取得值，指出控制項是否包含任何程式碼區塊。

public:
 virtual property bool HasAspCode { bool get(); };

public virtual bool HasAspCode { get; }

member this.HasAspCode : bool

Public Overridable ReadOnly Property HasAspCode As Boolean

屬性值

Boolean

如果控制項包含至少一個程式碼區塊，則為 true，否則為 false。

範例

本範例會 OnAppendToParentBuilder 覆寫 方法來檢查 ControlType 屬性，以判斷套用此產生器的控制項類型。 CustomTextBox如果是 ，則產生器會檢查 屬性的值 HasAspCode 是否包含在 控制項中。 如果是，則會擲回例外狀況，如果不是呼叫 方法，則會 HasBody 擲回例外狀況。

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