如何在设计时获取CompositeControl的标签元素子控件 [英] How to get a CompositeControl's tag-element child controls at design-time

问题描述

我正在设计基于CompositeControl的ASP.NET v3.5自定义控件.

但是，我不想通过代码创建我的子控件，而希望通过ASPX页面中CompositeControl中的嵌入式HTML标签元素来创建它们，例如:

I am designing an ASP.NET v3.5 custom control based on CompositeControl.

However, I do NOT want to create my child controls via code, but rather as embedded HTML tag elements within the CompositeControl in the ASPX page, such as:

<cc:MyCompositeControl ID="MyControl"> 
    <asp:Label>Cat</asp:Label> 
    <asp:Label>Cat</asp:Label> 
</cc:MyCompositeControl>

在运行时，MyControl.Controls包含了两个标签.

在设计时，MyControl.Controls为空.

出于各种原因，我在设计时需要此信息.

我在做什么错?

At run time, MyControl.Controls contains the two labels as expected.

At design time, MyControl.Controls is empty.

I need this information at design time for various reasons.

What am I doing wrong?

推荐答案

好，您需要重写 GetDesignTimeHtml 方法.为您的控件创建一个设计器类并覆盖它.

看一下这篇文章.这有一个如何显示HMTL设计时间的示例:具有Designer支持的Web应用程序的可自定义加载"控件 [ ^ ]

Well you need to override GetDesignTimeHtml method. Create a designer class for your control and override it.

Have a look at this article. This has an example of how to show design time HMTL: Customizable ''Loading'' Control for Web Applications with Designer Support[^]

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