html 和 asp.net 控件/元素中的 findcontrol() 奇怪之处？
谁能解释为什么 asp:imagebutton 给我一个格式错误的 html 错误，而 html input 元素却没有？我知道这是关于 onclientclick 中的 findcontrol() 任务。它们以完全相同的格式编写，但也许不应该如此？
<ItemTemplate>
<input type="image" src="Resources/info.png" onclick="toggle('<%# Container.FindControl("PresetUploadDescription").ClientID %>');return false;" />
<asp:ImageButton ImageUrl="Resources/info.png" OnClientClick="toggle('<%# Container.FindControl("PresetUploadDescription").ClientID %>');return false;" ToolTip="info" ID="Description" runat="server"/>
....
Can anyone offer an explanation as to why the asp:imagebutton gives me a badly formed html error while the html input element does not? I know it's about the findcontrol() in the onclientclick
assignment. They're written in exactly the same format but maybe they shouldn't be?
<ItemTemplate>
<input type="image" src="Resources/info.png" onclick="toggle('<%# Container.FindControl("PresetUploadDescription").ClientID %>');return false;" />
<asp:ImageButton ImageUrl="Resources/info.png" OnClientClick="toggle('<%# Container.FindControl("PresetUploadDescription").ClientID %>');return false;" ToolTip="info" ID="Description" runat="server"/>
....
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您不能使用 <%...%>在服务器上执行的控件中构造。 (runat="服务器")
<%#...%>用于数据绑定或 Eval 类型语句。
<%=...%>相当于 Response.Write 语句，它看起来像您正在尝试执行的操作（写出某个控件的 ClientID）。不幸的是，这也行不通——你会得到一个
，您需要通过“代码隐藏”页面将 OnClientClick 属性添加到 Imagebutton 控件：
You cannot use a <%...%> construct in a control that is executed at the server. (runat="server")
<%#...%> is used for databinding or Eval type statements.
<%=...%> is equivalent to a Response.Write statement, which looks like what you are trying to do (write out the ClientID of a certain control). Unfortunately, this won't work either - you'll get a
To fix, you need to Add the OnClientClick attribute to the Imagebutton control via the Code Behind page: