解决 The Controls collection cannot be modified because the control contains code blocks (i.e. )问题
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原帖地址：http://www.cnblogs.com/terrysun/archive/2010/10/19/Bug.html
在.aspx或.ascx的如果包括<%= %>，并在.aspx, .ascs中使用了AjaxToolkit中的控件，那么很可能会引发"The Controls collection cannot be modified because the control contains code blocks" 异常,
解决办法如下
1. 将<%= 换为<%#
2. 在.asp或模板页中的Page_Load事件中添加如下代码
Page.Header.DataBind();
- 解决 The Controls collection cannot be modified because the control contains code blocks (i.e. )问题
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