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我遇到了与AsyncFileUpload控件相关的奇怪问题。上传后,我通过从ClientUploadComplete事件处理程序调用_doPostBack函数来更新页面。它第一次正常工作,但下次我尝试上传文件时,它会在上传之前先刷新页面,然后重新上传并刷新页面。不知道为什么刷新页面在上传前一次和上传后一次被调用。我有这个错误的代码的简化版本。任何线索请问为什么会发生?文件上传后更新页面的问题
标记:
<form id="form1" runat="server">
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</asp:ToolkitScriptManager>
<div>
<asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:AsyncFileUpload ID="AsyncFileUpload1" runat="server" OnClientUploadComplete="AsyncFileUpload1_ClientUploadComplete"
OnUploadedComplete="AsyncFileUpload1_UploadedComplete" />
</ContentTemplate>
</asp:UpdatePanel>
</div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Button ID="Button1" runat="server" Text="Refresh Data" OnClick="Button1_Click" />
<asp:Label ID="Label1" runat="server" EnableViewState="false"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
</form>
的Javascript:
<script type="text/javascript">
function AsyncFileUpload1_ClientUploadComplete() {
var btnRefreshData = $get("<%=Button1.ClientID%>").name;
__doPostBack(btnRefreshData, "");
}
</script>
代码隐藏:
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = "Upload complete";
}
protected void AsyncFileUpload1_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
{
System.Threading.Thread.Sleep(3000);
}