get FTP file upload completed properly

[IT researcher]

I am using below code to upload files to web server FTP . In the below code i am facing some problems. I want the file to be completely uploaded and then control should come out of this function. Now in some cases control comes out of this function when some connection error occurs etc.I get error in catch .But even though error catches upload sometimes continues. So i want to know whether upload completed completely and then only come out of this function. How i can do it?

I tried checking file size of the uploading file using Ftp.GetFileSize .but even after all bytes uploaded it returns "The remote server returned an error: (550) File unavailable (e.g., file not found, no access)." error.

So how i can check file uploaded completely?

Public Function Upload(ByVal fi As FileInfo) As Boolean

        Dim URI As String = Hostname '' website is set here
        'perform copy
        Dim ftp As Net.FtpWebRequest = GetRequest(URI)

        'Set request to upload a file in binary
        ftp.Method = Net.WebRequestMethods.Ftp.UploadFile
        ftp.UseBinary = True

        'Notify FTP of the expected size
        ftp.ContentLength = fi.Length


        Const BufferSize As Integer = 400000000
        Dim content(BufferSize - 1) As Byte, dataRead As Integer

        'open file for reading 
        Using fs As FileStream = fi.OpenRead()
            Try
                'open request to send
                Using rs As Stream = ftp.GetRequestStream
                    Do
                        dataRead = fs.Read(content, 0, BufferSize)
                        rs.Write(content, 0, dataRead)
                    Loop Until dataRead < BufferSize
                    rs.Close()
                End Using


            Catch ex As Exception

            Finally
                'ensure file closed
                fs.Close()
            End Try

        End Using

        ftp = Nothing
        Return True

End Function

[paulg4ije]

Why do you catch the exception, ignore it and then always return true? I would start by returning false when an exception occurs. How you proceed from that point may depend upon what the exception is.