[Solved]: File upload control is not working inside Ajax UpdatePanel

In this article I am going to tell how we can resolve the issue while working with

Ajax update panel and fileupload control.

Description:

I have got an issue when working with Update panel control. I am using fileupload
control inside updatepanel.  When try to upload the file, posted filename is null.

Solution:

To resolve the issue set postback trigger for update panel. Set the control id or save/insert record button as shown below:

<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional" >

    <ContentTemplate>

</ContentTemplate>

    <Triggers>

     <asp:PostBackTrigger ControlID="btnsave"/>

    </Triggers>

    </asp:UpdatePanel>