WP7 - 帶圖像的POST表單

Question

我需要將Windows Phone 7的圖像發送到某些電子郵件地址。 我使用這個類將文本值提交給PHP腳本，解析數據並將格式化的電子郵件發送到地址。 問題是，我無法弄清楚如何將圖像發送到該腳本，以將圖像附加到電子郵件。 PHP腳本可以以任何方式更改。如果我有一個Image對象，我該如何改變這個類來允許發送圖像？

public class PostSubmitter 
{ 
    public string url { get; set; } 
    public Dictionary<string, string> parameters { get; set; } 

    public PostSubmitter() { } 

    public void Submit() 
    { 
     // Prepare web request... 
     HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url); 
     myRequest.Method = "POST"; 
     myRequest.ContentType = "application/x-www-form-urlencoded"; 

     myRequest.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), myRequest); 
    } 

    private void GetRequestStreamCallback(IAsyncResult asynchronousResult) 
    { 
     HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState; 
     System.IO.Stream postStream = request.EndGetRequestStream(asynchronousResult); 

     // Prepare Parameters String 
     string parametersString = ""; 
     foreach (KeyValuePair<string, string> parameter in parameters) 
     { 
      parametersString = parametersString + (parametersString != "" ? "&" : "") + string.Format("{0}={1}", parameter.Key, parameter.Value); 
     } 

     byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(parametersString); 
     // Write to the request stream. 
     postStream.Write(byteArray, 0, parametersString.Length); 
     postStream.Close(); 
     // Start the asynchronous operation to get the response 
     request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request); 
    } 

    private void GetResponseCallback(IAsyncResult asynchronousResult) 
    { 
     HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState; 
     HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult); 
     Stream streamResponse = response.GetResponseStream(); 
     StreamReader streamRead = new StreamReader(streamResponse); 
     string responseString = streamRead.ReadToEnd(); 
     // Close the stream object 
     streamResponse.Close(); 
     streamRead.Close(); 
     // Release the HttpWebResponse 
     response.Close(); 
     //Action<string> act = new Action<string>(DisplayResponse); 
     //this.Dispatcher.BeginInvoke(act, responseString); 
    } 

我使用類以這樣的方式

Dictionary<string, string> data = new Dictionary<string, string>() 
{ 
     {"nom", nom.Text}, 
     {"cognoms", cognoms.Text}, 
     {"email", email.Text}, 
     {"telefon", telefon.Text} 
}; 

PostSubmitter post = new PostSubmitter() { url = "http://example.com/parserscript.php", parameters = data }; 
post.Submit(); 

非常感謝您！

Answer 1

我已經將上面的代碼轉換爲以下，我相信它會幫助：

public class PostSubmitter 
{ 
    public string url { get; set; } 
    public Dictionary<string, object> parameters { get; set; } 
    string boundary = "----------" + DateTime.Now.Ticks.ToString(); 

    public PostSubmitter() { } 

    public void Submit() 
    { 
     // Prepare web request... 
     HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(new Uri(url)); 
     myRequest.Method = "POST"; 
     myRequest.ContentType = string.Format("multipart/form-data; boundary={0}", boundary); 

     myRequest.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), myRequest); 
    } 

    private void GetRequestStreamCallback(IAsyncResult asynchronousResult) 
    { 
     HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState; 
     Stream postStream = request.EndGetRequestStream(asynchronousResult); 

     writeMultipartObject(postStream, parameters); 
     postStream.Close(); 

     request.BeginGetResponse(new AsyncCallback(GetResponseCallback), request); 
    } 

    private void GetResponseCallback(IAsyncResult asynchronousResult) 
    { 
     HttpWebRequest request = (HttpWebRequest)asynchronousResult.AsyncState; 
     HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult); 
     Stream streamResponse = response.GetResponseStream(); 
     StreamReader streamRead = new StreamReader(streamResponse); 
     streamResponse.Close(); 
     streamRead.Close(); 
     // Release the HttpWebResponse 
     response.Close(); 
    } 


    public void writeMultipartObject(Stream stream, object data) 
    { 
     StreamWriter writer = new StreamWriter(stream); 
     if (data != null) 
     { 
      foreach (var entry in data as Dictionary<string, object>) 
      { 
       WriteEntry(writer, entry.Key, entry.Value); 
      } 
     } 
     writer.Write("--"); 
     writer.Write(boundary); 
     writer.WriteLine("--"); 
     writer.Flush(); 
    } 

    private void WriteEntry(StreamWriter writer, string key, object value) 
    { 
     if (value != null) 
     { 
      writer.Write("--"); 
      writer.WriteLine(boundary); 
      if (value is byte[]) 
      { 
       byte[] ba = value as byte[]; 

       writer.WriteLine(@"Content-Disposition: form-data; name=""{0}""; filename=""{1}""", key, "sentPhoto.jpg"); 
       writer.WriteLine(@"Content-Type: application/octet-stream"); 
       //writer.WriteLine(@"Content-Type: image/jpeg"); 
       writer.WriteLine(@"Content-Length: " + ba.Length); 
       writer.WriteLine(); 
       writer.Flush(); 
       Stream output = writer.BaseStream; 

       output.Write(ba, 0, ba.Length); 
       output.Flush(); 
       writer.WriteLine(); 
      } 
      else 
      { 
       writer.WriteLine(@"Content-Disposition: form-data; name=""{0}""", key); 
       writer.WriteLine(); 
       writer.WriteLine(value.ToString()); 
      } 
     } 
    } 
} 

將圖像從相機轉換爲字節數組，我用了follwing：

private void photoChooserTask_Completed(object sender, PhotoResult e) 
     { 
      try 
      { 
       BitmapImage image = new BitmapImage(); 
       image.SetSource(e.ChosenPhoto); 
       foto.Source = image; 

       using (MemoryStream ms = new MemoryStream()) 
       { 
        WriteableBitmap btmMap = new WriteableBitmap(image); 

        // write an image into the stream 
        Extensions.SaveJpeg(btmMap, ms, image.PixelWidth, image.PixelHeight, 0, 100); 

        byteArray = ms.ToArray(); 
       } 
      } 
      catch (ArgumentNullException) { /* Nothing */ } 
     } 

我使用的類是這樣的：

Dictionary<string, object> data = new Dictionary<string, object>() 
     { 
      {"nom", nom.Text}, 
      {"cognoms", cognoms.Text}, 
      {"email", email.Text}, 
      {"telefon", telefon.Text}, 
      {"comentari", comentari.Text}, 
      {"foto", byteArray}, 
     }; 
     PostSubmitter post = new PostSubmitter() { url = "http://example.com/parserscript.php", parameters = data}; 
     post.Submit(); 

我不知道這是從手機發送圖像到服務器的最佳方式，但我找不到任何東西，所以我讓自己的課程只是閱讀這個和那個，而且它已經帶走了我幾個天。如果有人想改進代碼或寫任何評論將受到歡迎。

Answer 2

在這裏有很多問題/答案，以幫助已經

例如， Post with WebRequest - 雖然我無法找到任何具體的照片。

也許最好的方法是在Codeplex上使用類似Hammock的東西 - http://hammock.codeplex.com/ - 或者像RESTSharp - http://restsharp.org/ - 它們提供標準的REST POST函數。

例如如果你看Hammock，那麼你會發現其他人已經發布圖像直接從相機tumblr - 請參閱http://hammock.codeplex.com/discussions/235650

Answer 3

上述代碼完美無缺。我只是用不同的方法來將文件轉換爲字節數組，它可以完美兼容音頻

public static class FileHelper 
{ 
    public static byte[] ReadToEnd(System.IO.Stream stream) 
    { 
     long originalPosition = stream.Position; 
     stream.Position = 0; 

     try 
     { 
      byte[] readBuffer = new byte[4096]; 

      int totalBytesRead = 0; 
      int bytesRead; 

      while ((bytesRead = stream.Read(readBuffer, totalBytesRead, readBuffer.Length - totalBytesRead)) > 0) 
      { 
       totalBytesRead += bytesRead; 

       if (totalBytesRead == readBuffer.Length) 
       { 
        int nextByte = stream.ReadByte(); 
        if (nextByte != -1) 
        { 
         byte[] temp = new byte[readBuffer.Length * 2]; 
         Buffer.BlockCopy(readBuffer, 0, temp, 0, readBuffer.Length); 
         Buffer.SetByte(temp, totalBytesRead, (byte)nextByte); 
         readBuffer = temp; 
         totalBytesRead++; 
        } 
       } 
      } 

      byte[] buffer = readBuffer; 
      if (readBuffer.Length != totalBytesRead) 
      { 
       buffer = new byte[totalBytesRead]; 
       Buffer.BlockCopy(readBuffer, 0, buffer, 0, totalBytesRead); 
      } 
      return buffer; 
     } 
     finally 
     { 
      stream.Position = originalPosition; 
     } 
    } 
}