WebClient.UploadData和内部500错误

Question

所有人。我正在使用c#语言编程，但我在使用WebClient类时遇到问题。我使用WebClient.DownloadData方法下载了一个图像，它工作得很好。但WebClient.UploadData并非如此。详细地说，我有一个包含图片内容的byte[] -名为bytes，以及我想要上传到的图片文件夹的网址-名为filePath。然后,

 WebClient wc = new WebClient(); 
 byte[] responseArray = wc.UploadData(filePath, "POST", bytes);

然后它返回给我下面的错误

System.Net.WebException: The remote server returned an error: (500) Internal Server Error.
   at System.Net.WebClient.UploadDataInternal(Uri address, String method, Byte[] data, WebRequest& request)
   at System.Net.WebClient.UploadData(Uri address, String method, Byte[] data)
   at System.Net.WebClient.UploadData(String address, String method, Byte[] data)

我也研究了这个问题的一些解决方案，但是没有一个对我有效。:(请帮帮忙！:-s

Answer 1

试试这个页面。它有一个张贴的例子。

它使用的是webrequest而不是webclient，但它来自微软，应该是一个很好的例子。

WebRequest request = WebRequest.Create ("http://www.contoso.com/PostAccepter.aspx ");
request.Method = "POST";
string postData = "This is a test that posts this string to a Web server.";
byte[] byteArray = Encoding.UTF8.GetBytes (postData);
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = byteArray.Length;


//Here is the Business end of the code...
Stream dataStream = request.GetRequestStream ();
dataStream.Write (byteArray, 0, byteArray.Length);
dataStream.Close ();
//and here is the response.
WebResponse response = request.GetResponse ();

Console.WriteLine (((HttpWebResponse)response).StatusDescription);
dataStream = response.GetResponseStream ();
StreamReader reader = new StreamReader (dataStream);
string responseFromServer = reader.ReadToEnd ();
Console.WriteLine (responseFromServer);
reader.Close ();
dataStream.Close ();
response.Close ();

我精简了代码，并注释了您想要查看的部分。

http://msdn.microsoft.com/en-us/library/debx8sh9.aspx