C#远程服务器返回错误: (500) 内部服务器错误

今天写代码，报错：远程服务器返回错误: (500) 内部服务器错误，开始以为是服务器的问题，后来才发现是自己写请求的时候的问题，出问题之前，我的HTTP请求是这么写的：

 public static HttpWebResponse CreatePostHttpResponse(string url, IDictionary<string, string> parameters, int timeout, string param) { HttpWebrequest request = null; request = WebRequest.Create(url) as HttpWebRequest; request.Proxy = null; request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; if (timeout > 0) request.Timeout = timeout; if (!string.IsNullOrEmpty(param)) request.Headers.Add("Authorization", param); //发送POST数据 if (!(parameters == null || parameters.Count == 0)) { StringBuilder buffer = new StringBuilder(); int i = 0; foreach (string key in parameters.Keys) { if (i > 0) { buffer.AppendFormat("&amp;{0}={1}", key, parameters[key]); } else { buffer.AppendFormat("{0}={1}", key, parameters[key]); i++; } } byte[] data = Encoding.UTF8.GetBytes(buffer.ToString()); using (Stream stream = request.GetRequestStream()) { stream.Write(data, 0, data.Length); } } string[] values = request.Headers.GetValues("Content-Type"); return request.GetResponse() as HttpWebResponse; } 

注意请求头：request.ContentType = “application/x-www-form-urlencoded”;

然后我换了一种请求方式：

 public static HttpWebResponse CreatePostHttpResponse(string url, string jsonParam) { HttpWebRequest request = null; request = WebRequest.Create(url) as HttpWebRequest; request.Proxy = null; request.Method = "POST"; request.ContentType = "application/json"; byte[] data = Encoding.UTF8.GetBytes(jsonParam); request.ContentLength = data.Length; using (Stream stream = request.GetRequestStream()) { stream.Write(data, 0, data.Length); } return request.GetResponse() as HttpWebResponse; } 

注意请求头 request.ContentType = “application/json”;

总结，因为他们需要的请求头是标准的json格式，但是我发送的请求头格式不是标准的json格式，所以报这个错了，改一下就OK了，