ControlBuilder.HasBody 方法

定義

命名空間:

System.Web.UI

組件:

System.Web.dll

判斷控制項是否有開頭和結尾標記。 此方法由 ASP.NET 網頁架構呼叫。

public:
 virtual bool HasBody();

public virtual bool HasBody ();

abstract member HasBody : unit -> bool
override this.HasBody : unit -> bool

Public Overridable Function HasBody () As Boolean

傳回

Boolean

如果控制項有開頭和結尾標記，則為 true，否則為 false。

範例

這個範例會 OnAppendToParentBuilder 覆寫 方法來檢查 ControlType 屬性，以判斷套用這個產生器所套用的控制項類型。 CustomTextBox如果是 ，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，如果沒有呼叫 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

備註

這個方法是由剖析期間 ASP.NET 網頁架構所呼叫，不適合直接在您程式碼中呼叫。