大家帮帮我~二进制流获取后提出图片流生成图片并保存到本地...急啊~请高手帮帮我...

如题~ --------------------编程问答-------------------- 不明白你的二进制流是什么样子
Dim Img As New Bitmap(IO.Stream)
或者是byte数组 --------------------编程问答-------------------- 谢谢流言~是这样的....
  Public Function postCaptcha(ByVal strApiKey As String, ByVal strCaptchaFile As String) As String
        Dim objEncoding As New System.Text.UTF8Encoding
        Dim objStreamWriter As System.IO.StreamWriter
        Dim objStream As System.IO.Stream
        Dim objHTTPRequest As HttpWebRequest
        Dim sbPostData As New System.Text.StringBuilder
        Dim intUploadBit As Integer
        Dim intUploadSoFar As Integer
        Dim inttoUpload As Integer
        Dim i As Integer
        Dim objStreamReader As System.IO.Stream
        Dim strResult As String

        'set request properties
        objHTTPRequest = System.Net.WebRequest.Create("http://localhost:1116/captch易做图/api.aspx")
        objHTTPRequest.AllowAutoRedirect = True
        objHTTPRequest.Accept = "*/*"
        objHTTPRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705)"
        objHTTPRequest.KeepAlive = False
        objHTTPRequest.Timeout = 30000
        objHTTPRequest.Method = "POST"
        objHTTPRequest.ContentType = "multipart/form-data; boundary=7cf2a327f01ae"

        sbPostData.Append("--" + "7cf2a327f01ae" + vbCrLf)
        sbPostData.Append("Content-Disposition: form-data; name=""api_key""" + vbCrLf)
        sbPostData.Append(vbCrLf)
        sbPostData.Append(strApiKey + vbCrLf)

        sbPostData.Append("--" + "7cf2a327f01ae" + vbCrLf)
        sbPostData.Append("Content-Disposition: form-data; name=""expire""" + vbCrLf)
        sbPostData.Append(vbCrLf)
        sbPostData.Append("1000" + vbCrLf)   'defaulted to 1000 but you can change this

        sbPostData.Append("--" + "7cf2a327f01ae" + vbCrLf)
        sbPostData.Append("Content-Disposition: form-data; name=""method""" + vbCrLf)
        sbPostData.Append(vbCrLf)
        sbPostData.Append("upload_captcha" + vbCrLf)

        sbPostData.Append("--" + "7cf2a327f01ae" + vbCrLf)
        sbPostData.Append("Content-Disposition: form-data; name=""rights""" + vbCrLf)
        sbPostData.Append(vbCrLf)
        sbPostData.Append("false" + vbCrLf) 'defaulted to false but you can change this

        'this is the header for our captcha file upload
        sbPostData.Append("--" + "7cf2a327f01ae" + vbCrLf)
        sbPostData.Append("Content-Disposition: form-data; name=""file""; filename=""" & strCaptchaFile & "" + vbCrLf)
        sbPostData.Append("Content-Type: image/pjpeg" + vbCrLf)
        sbPostData.Append(vbCrLf)

        'read our captch into a byte array
        Dim objBinReader As New BinaryReader(File.OpenRead(strCaptchaFile))
        Dim bytPhotoContents As Byte() = objBinReader.ReadBytes(objBinReader.BaseStream.Length)
        objBinReader.Close()

        'convert our other post data into a byte array
        Dim bytPostContents As Byte() = objEncoding.GetBytes(sbPostData.ToString)

        'create a footer for insertation after the file bytes are uploaded
        Dim bytPostFooter As Byte() = objEncoding.GetBytes(vbCrLf + "--" + "7cf2a327f01ae" + vbCrLf)

        'create a new data buffer to hold all of our byte arrays
        Dim bytDataBuffer As Byte() = New Byte(bytPostContents.Length + bytPhotoContents.Length + bytPostFooter.Length) {}

        'copy the contents of our three byte arrays into our single byte array
        System.Buffer.BlockCopy(bytPostContents, 0, bytDataBuffer, 0, bytPostContents.Length)
        System.Buffer.BlockCopy(bytPhotoContents, 0, bytDataBuffer, bytPostContents.Length, bytPhotoContents.Length)
        System.Buffer.BlockCopy(bytPostFooter, 0, bytDataBuffer, bytPostContents.Length + bytPhotoContents.Length, bytPostFooter.Length)

        'set the content length based on our new byte array length
        objHTTPRequest.ContentLength = bytDataBuffer.Length

        'get our stream and post our data
        objStream = objHTTPRequest.GetRequestStream()

        'chunk up our data and upload it to our stream
        'will generally only need to send in one chunk unless file is large
        intUploadBit = Math.Max(bytDataBuffer.Length / 100, 50 * 1024)
        intUploadSoFar = 0

        While i < bytDataBuffer.Length
            inttoUpload = Math.Min(intUploadBit, bytDataBuffer.Length - i)
            intUploadSoFar += inttoUpload
            objStream.Write(bytDataBuffer, i, inttoUpload)
            i = i + intUploadBit
        End While

        'close our stream
        objStream.Close()

        'get the response from the server
        Dim objHTTPResponse As HttpWebResponse = CType(objHTTPRequest.GetResponse(), HttpWebResponse)
        objStreamReader = objHTTPResponse.GetResponseStream()

        'final result from server is returned to strResult
        Dim objStreamResult As New System.IO.StreamReader(objStreamReader)
        strResult = objStreamResult.ReadToEnd


        'close our objects
        objStreamReader.Close()
        objStreamResult.Close()

        Return strResult

    End Function

api.aspx这是POST过api.aspx.cs 里可以用 Request.Form["api_key"].ToString()取到值正确的值,但是:"file"图片文件流都不能这样取了这样取出来是乱码~请问谁知道这个图片流怎样取出来并生成图片~谢谢各位了.... --------------------编程问答--------------------

补充：.NET技术 ,  VB.NET