今天寫代碼，報錯：遠程服務器返回錯誤: (500) 內部服務器錯誤，開始以為是服務器的問題，后來才發現是自己寫請求的時候的問題，出問題之前，我的HTTP請求是這么寫的：

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);//發送POST數據 if (!(parameters == null || parameters.Count == 0)){StringBuilder buffer = new StringBuilder();int i = 0;foreach (string key in parameters.Keys){if (i > 0){buffer.AppendFormat("&{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;}

注意請求頭：request.ContentType = “application/x-www-form-urlencoded”;

然后我換了一種請求方式：

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;}

注意請求頭 request.ContentType = “application/json”;

總結，因為他們需要的請求頭是標準的json格式，但是我發送的請求頭格式不是標準的json格式，所以報這個錯了，改一下就OK了，

總結

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