Article Writing

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
         UploadFile("C:\test.txt, Servername & "/test.txt", User, PW)
        Application.DoEvents()
   End Sub
    Public Sub UploadFile(ByVal _FileName As String, ByVal _UploadPath As String, ByVal _FTPUser As String, ByVal _FTPPass As String)

        Try
            Dim _FileInfo As New System.IO.FileInfo(_FileName)
            Dim _FtpWebRequest As System.Net.FtpWebRequest = CType(System.Net.FtpWebRequest.Create(New Uri(_UploadPath)), System.Net.FtpWebRequest)
            _FtpWebRequest.Credentials = New System.Net.NetworkCredential(_FTPUser, _FTPPass)
            _FtpWebRequest.EnableSsl = True
            _FtpWebRequest.KeepAlive = False
            _FtpWebRequest.Timeout = 15000
            _FtpWebRequest.Method = System.Net.WebRequestMethods.Ftp.UploadFile
            _FtpWebRequest.UseBinary = True
            _FtpWebRequest.ContentLength = _FileInfo.Length
            Dim buffLength As Integer = 2048
            Dim buff(buffLength - 1) As Byte
            Dim _FileStream As System.IO.FileStream = _FileInfo.OpenRead()
            Dim _Stream As System.IO.Stream = _FtpWebRequest.GetRequestStream()
            Dim contentLen As Integer = _FileStream.Read(buff, 0, buffLength)
            Application.DoEvents()
            Do While contentLen <> 0
                _Stream.Write(buff, 0, contentLen)
                contentLen = _FileStream.Read(buff, 0, buffLength)
            Loop
                    Catch ex As Exception
            End Try
    End Sub

1. Click on "Browse...", select a file (a 90K .jpg), click "Open" in windows, and the filename appears on the article page. Saved the article and went to re-edit it. The filename was gone.
2. Thought that maybe the image had to be uploaded first, after which a relative link could be used. Dragging it into the "Drag and Drop Files Here" box did nothing.
3. Found an image on Pexel and pasted its URL into the box. Saved the article and went to re-edit it. The URL was gone.

Need sample c# code for multi selection combobox  filled along with search features for windows app.