如何向ext:FileUploadField
控件添加工具提示?我试图为我的浏览按钮分配一个工具提示,如下所示,但它不起作用。
<ext:FileUploadField ID="FileUpload1" runat="server" Icon="BrowsePicture" ButtonText="" ButtonOnly="true" AutoPostBack="true">
<ToolTips>
<ext:ToolTip runat="server" ID="FileUpload1_TT" Title="Browse" Html="Browse"></ext:ToolTip>
</ToolTips>
<Listeners>
<FileSelected Fn="showFile" />
</Listeners>
</ext:FileUploadField>