Received error message which indicates that the respective file is already open.

Hi Experts,

I wrote the following code for downloading an excel file:

Select Case strFileType
            Case "txt" : Response.ContentType = "text/plain"
            Case "xls", "csv" : Response.ContentType = "application/x-msexcel"
            Case Else
                Response.ContentType = "application/octet-stream"
        End Select
Response.AddHeader("content-disposition", "inline; filename=" & ReportFileName) Response.TransmitFile(reportPhysPath & ReportFileName)
       Response.End()

The configuration is ASP.Net with VB.Net.

During the event strangely I received an error message. It indicates that the respective file is already open.

Have a look at the screenshot below.

Please help me to fix the problem.

Microsoft Office Excel

The file you are trying to open, 'Download.xls', is in a different format than specified by the file extension. Verify that the file is not corrupted and is

from a trusted source before opening the file. Do you want to open the file now?

                                                                  Yes                   No