Capture the relevant path

Hi,

when running the deployed project in the client machine, I try to catch the full path of the selected file, using these codes

            if (FileUploadControl.HasFile)
            {
                try
                {
                    ...
                    tb_fullname.Text = System.IO.Path.GetFullPath(FileUploadControl.PostedFile.FileName);
                    ...

but I checked that tb_fullname.Text is having the value like

c:\windows\system32\inetsrv\file1.png



not the relevant path in the client machine, in which I'm choosing the file to upload. How to adjust the above?

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Many Thanks & Best Regards, Hua Min