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我遇到了與AsyncFileUpload控件相關的奇怪問題。上傳後,我通過從ClientUploadComplete事件處理程序調用_doPostBack函數來更新頁面。它第一次正常工作,但下次我嘗試上傳文件時,它會在上傳之前先刷新頁面,然後重新上傳並刷新頁面。不知道爲什麼刷新頁面在上傳前一次和上傳後一次被調用。我有這個錯誤的代碼的簡化版本。任何線索請問爲什麼會發生?文件上傳後更新頁面的問題
標記:
<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>
代碼隱藏:
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);
}