file upload control in updatepanel is not working correctly

I added a file upload inside an UpdatePanel using the following code:

   

        <%-- File upload + other codes here -->

   

 

• When I try to get the selected file name using:

if (fuLoanConfirmation.HasFile)
{
    string fileName = fuLoanConfirmation.PostedFile.FileName.ToString();
}

 

fuLoanConfirmation.HasFile always returns false.

I also set triggers for the UpdatePanel, but it still didn't work.

When I removed the UpdatePanel, it worked, but I need the UpdatePanel to be included.