multipart로 이미지 + 텍스트 파일 전송하는 부분인데

아에 기초도 모르고 있는 부분이어서 구글링 해서 코딩하긴 했는데

리턴값은 true로 나오는데 이미지가 제대로 올라가질 않은상태 입니다.

며칠째 고민하고 있는거라 사소한것이라도 도움이나 조언좀 부탁드립니다.

file , Code 형태입니다.

아래는 코드 소스입니다.

         Dim dataBoundary As String = "--xyz"

        Dim req As HttpWebRequest = DirectCast(WebRequest.Create("주소.xml"), HttpWebRequest)

        req.UserAgent = "Validator Test"

        req.ContentType = "multipart/form-data; boundary=xyz"

        req.Method = "POST"

        req.KeepAlive = True

        Dim DataString As StringBuilder = New StringBuilder

        DataString.Append(dataBoundary + vbCrLf)

        DataString.Append("Content-Disposition: form-data; name=""file""; filename=""temp_image2.png""" + vbCrLf)

        DataString.Append("Content-Type: image/png" + vbCrLf)

        Dim localfile As String = Application.StartupPath & "\temp_image2.png"

        Dim BinaryData As Byte() = System.IO.File.ReadAllBytes(localfile)

        Dim FileData As String = Encoding.ASCII.GetString(BinaryData)

        DataString.Append(vbCrLf)
        DataString.Append(FileData)
        DataString.Append(vbCrLf)

        DataString.Append("--" + "xyz--" + vbCrLf)

        DataString.Append("Content-Disposition: form-data; Code=""00001""" + vbCrLf)

        DataString.Append("Content-Type: application/x-www-form-urlencoded" + vbCrLf)

        DataString.Append("xyz--")

        Dim Postdata As Byte() = Encoding.ASCII.GetBytes(DataString.ToString())

        req.ContentLength = Postdata.Length

        Dim tempStream As Stream = req.GetRequestStream()

        tempStream.Write(Postdata, 0, Postdata.Length)

        tempStream.Close()

        req.Method = "GET"

        Dim Resp As HttpWebResponse = CType(req.GetResponse(), HttpWebResponse)

        Dim sr As StreamReader = New StreamReader(Resp.GetResponseStream(), Encoding.Default)

        'Convert the stream to a string 

        Dim s As String = sr.ReadToEnd()

        sr.Close()

        Resp.Close()

        MsgBox(s)