ControlBuilder.HasAspCode 属性

定义

命名空间:

System.Web.UI

程序集:

System.Web.dll

获取一个值，该值指示控件是否包含任何代码块。

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

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

public bool HasAspCode { get; }

public virtual bool HasAspCode { get; }

member this.HasAspCode : bool

Public ReadOnly Property HasAspCode As Boolean

Public Overridable ReadOnly Property HasAspCode As Boolean

属性值

Boolean

如果控件包含至少一个代码块，则为 true；否则为 false。

示例

此示例重写 OnAppendToParentBuilder 了用于检查 ControlType 属性以确定此生成器应用于的控件类型的方法。 如果是， CustomTextBox则生成器检查属性的值 HasAspCode 是否包含在控件中。 如果是这样，则会引发异常（如果未 HasBody 调用该方法）。

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