Hello,

I want to upload the file in my application. when I write the code without using ajax update panel, then it is uploading the file.

but when i use update panel, then file is not uploading file, it showing there is no any file in the upload control.

my code is as follows

 HTML view

<form id="form1" runat="server">

<asp:ScriptManager ID="ScriptManager1" runat="server" />

<asp:UpdatePanel ID="update" runat="server">

<ContentTemplate>

<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />

<asp:FileUpload ID="FileUpload1" runat="server" />

</ContentTemplate>

</asp:UpdatePanel>

</form>

   and i just written in code behind

protected void Button1_Click(object sender, EventArgs e)

{

if (FileUpload1.HasFile)

{

Response.Write(FileUpload1.FileName.ToString());

}

}

but it giving the exception.

please help me..

Uploads cannot be done in ASP.NEt Ajax e.g they always require a full postback. But to work in conjuction with UpdatePanel while other parts of the UpdatePanel work in async manner, you'd need to attach a PostBackTrigger to the Button triggering upload

<Triggers>
    <asp:PostBackTrigger ControlID="Button1" />
    </Triggers>

ASP.NEt Ajax's documentation covers this exact case (Upload in UpdatePanel/PostBAckTrigger). It's at: http://www.asp.net/ajax/documentation/live/ViewSample.aspx?sref=System.Web.UI.PostBackTrigger%23PostBackTriggerCS.aspx

Thnaks for reply..

my problem is solved.