防止其他服务器控件作为自定义 ASP.NET 控件的子控件

发布于 2024-11-02 23:43:37 字数 615 浏览 0 评论 0原文

除了创建自定义 ControlBuilder 类之外，是否有其他方法可以防止将服务器控件作为子控件添加到自定义 ASP.NET 控件中？

例如，假设我正在构建自己的 Panel 控件：

<my:SpecialPanel ID="SpecialPanel1" runat="server">
    <!-- Allow valid HTML -->
    <input id="tbEmailAddress" type="text" />
</my:SpecialPanel>

我想阻止用户在 SpecialPanel 内添加服务器端控件：

<my:SpecialPanel ID="SpecialPanel1" runat="server">
    <!-- WRONG - Throw an Exception -->
    <asp:TextBox ID="tbEmailAddress" runat="server" />
</my:SpecialPanel>

有什么建议吗？

原文

Is there a way, other than creating a custom ControlBuilder class, to prevent server controls from being added as children in a custom ASP.NET control?

For example, let's say I am building my own Panel control:

<my:SpecialPanel ID="SpecialPanel1" runat="server">
    <!-- Allow valid HTML -->
    <input id="tbEmailAddress" type="text" />
</my:SpecialPanel>

I want to prevent users from adding server-side controls inside the SpecialPanel:

<my:SpecialPanel ID="SpecialPanel1" runat="server">
    <!-- WRONG - Throw an Exception -->
    <asp:TextBox ID="tbEmailAddress" runat="server" />
</my:SpecialPanel>

Any suggestions?

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暖阳 2024-11-09 23:43:37

您可以覆盖 Control.AddParsedSubObject方法：

public class SpecialPanel : Control
{
   protected override void AddParsedSubObject(Object obj) 
   {
      if (obj is Control) 
      {
         throw new InvalidOperationException(
             "The 'SpecialPanel' control cannot contain server controls");
      }
   }
}

相关资源：

IParserAccessor 接口

You could override the Control.AddParsedSubObject method:

public class SpecialPanel : Control
{
   protected override void AddParsedSubObject(Object obj) 
   {
      if (obj is Control) 
      {
         throw new InvalidOperationException(
             "The 'SpecialPanel' control cannot contain server controls");
      }
   }
}

Related resources: