如何在Windows Phone中使用字節陣列[]發佈圖像

Question

我試圖將圖像發佈爲byte數組。 我已經使用下面的代碼將圖像轉換爲字節，現在我想將它發佈到服務器。

WriteableBitmap btmMap = new WriteableBitmap(bi); 
System.Windows.Media.Imaging.Extensions.SaveJpeg(btmMap, ms, 200, 200, 0, 100); 
result = ms.ToArray(); 

我該如何執行POST操作？

Answer 1

我建議將MIME multipart作爲內容類型。如果你問我，這是最適合字節數組的內容類型。實現這一點的一種方式：

public static async Task<string> Upload(byte[] data, string fileName, string uri) 
{ 
    HttpClient client = new HttpClient(); 
    HttpMultipartFormDataContent content = new HttpMultipartFormDataContent("Upload----" + DateTime.Now.ToString(System.Globalization.CultureInfo.InvariantCulture)); 
    InMemoryRandomAccessStream contentStream = new InMemoryRandomAccessStream(); 
    DataWriter dw = new DataWriter(contentStream); 
    dw.WriteBytes(data); 
    await dw.StoreAsync(); 
    await dw.FlushAsync(); 
    dw.DetachStream(); 
    contentStream.Seek(0); 
    HttpStreamContent streamContent = new HttpStreamContent(contentStream); 
    content.Add(streamContent, "MIMEFile", fileName); 
    try 
    { 
     using (var message = await client.PostAsync(new Uri(uri), content)) 
     { 
      if (message.StatusCode != HttpStatusCode.Ok) 
      { 
       return String.Format("ERROR ({0})",message.StatusCode); 
      } 
      var result = await message.Content.ReadAsStringAsync(); 
      return result; 
     } 
    } 
    catch (Exception ex) 
    { 
     return String.Format("ERROR ({0})", ex.Message); 
    } 
} 

Answer 2

試試下面的代碼：

HttpClient httpClient = new HttpClient(); 
MultipartFormDataContent form = new MultipartFormDataContent(); 

var imageForm = new ByteArrayContent(result, 0, result.Count()); 
imagenForm.Headers.ContentType = new MediaTypeHeaderValue("image/jpg"); 

form.Add(imagenForm, "image", "nameholder.jpg"); 

HttpResponseMessage response = await httpClient.PostAsync("URL_here", form); 

response.EnsureSuccessStatusCode(); 
string result = response.Content.ReadAsStringAsync().Result; 
httpClient.Dispose(); 

希望這有助於的您可以獲取有關如何byte arry to POST傳遞到API調用的想法。

編輯：

HttpClient httpClient = new HttpClient(); 
MultipartFormDataContent form = new MultipartFormDataContent(); 

form.Add(new StringContent(UserID), "UserID"); 

var imageForm = new ByteArrayContent(result, 0, result.Count()); 
imagenForm.Headers.ContentType = new MediaTypeHeaderValue("image/jpg"); 

form.Add(imagenForm, "image", "nameholder.jpg"); 

HttpResponseMessage response = await httpClient.PostAsync("URL_here", form); 

response.EnsureSuccessStatusCode(); 
string result = response.Content.ReadAsStringAsync().Result; 
httpClient.Dispose();