带有鼠标事件处理程序的ImageButton被认为没有很好地形成 [英] ImageButton With Mouse Event Handlers Considered Not Well Formed

问题描述

ASP.NET表示以下ImageButton服务器标记格式不正确：

 < asp：TableCell VerticalAlign =顶部> 
  onmouseout =this.src ='images / add_plus_1.gif'
 onmouseover =this.src ='Images / add_plus_2.gif'
 onmousedownthis.src ='Images / add_plus_3.gif'
 CauseValidation =falsestyle =cursor：pointer 
 OnClientClick =Javascript：SL_AddBuilding（）/> 
< / asp：TableCell> 
  

我认为所有的鼠标事件属性都是合法的，所以我不知道它在抱怨什么。

解决方案

如果您逐字地从代码中复制了它，那么您将缺少一个等号：

onmousedownthis.src ='图片/ add_plus_3.gif'

ASP.NET says that the following ImageButton server tag is not well formed:

<asp:TableCell VerticalAlign="Top">
    <asp:ImageButton runat="server" ID="imgAdd" src="Images/add_plus_1.gif"
        onmouseout="this.src='Images/add_plus_1.gif'"
        onmouseover="this.src='Images/add_plus_2.gif'"
        onmousedown"this.src='Images/add_plus_3.gif'"
        CauseValidation="false" style="cursor: pointer"
        OnClientClick="Javascript:SL_AddBuilding()" />
</asp:TableCell>

I think all the mouse event attributes are legit, so I don't know what it's complaining about.

解决方案

If you copied it verbatim from your code you are missing an equal sign:

onmousedown"this.src='Images/add_plus_3.gif'"

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