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我正在尝试发送一些数据以写入我们的 SQL 服务器。我添加了一个更新面板,以便用户知道它正在处理。在我添加更新面板之前,所有数据都可以正常发送,在我添加更新面板之后,文本框可以正常发送,但 FileUpload 控件无法发送任何内容。有任何想法吗?谢谢。这是我的aspx代码

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<asp:ToolkitScriptManager ID="ToolkitScriptManager" runat="server">
</asp:ToolkitScriptManager>
       <h2>   
        Upload Your File
        </h2><br />
        <asp:FileUpload ID="FileUploader" runat="server" />
        <br /><br />
        Please Enter a Patient ID: <asp:TextBox ID="PatientIDTextBox" runat="server"></asp:TextBox>
        <br /><br />
        Please Enter a Draw Date: <asp:TextBox ID="DrawDateTextBox" runat="server"></asp:TextBox>
        <asp:CalendarExtender
        ID="CalendarExtender1"
        TargetControlID = "DrawDateTextBox"
        runat="server">
        </asp:CalendarExtender><br />
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
        <asp:Button ID="ProcessFileBtn" runat="server" Text="Process File"  
        OnClick="ProcessFileBtn_OnClick" /><br /><br />
        <asp:Label ID="TestLabel" runat="server" Text=""></asp:Label><br /><br />
    </ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1" runat="server">
    <ProgressTemplate>
        <div id="blur">&nbsp;</div>
        <div id="progress" class="center">
            <center>
                <i>Update in progress. Please wait ...<br />
                </img src="Images/MyAjaxLoader.gif" />
            </center>
        </div>  
    </ProgressTemplate>
</asp:UpdateProgress>
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