public static string PostMoths(string url, LoginDTO obj_model, Dictionary<string, string> dic = null)
???????{
???????????dic = new Dictionary<string, string>();
???????????dic.Add("Abp.TenantId", "null");
???????????// .AspNetCore.Culture:zh - CN
???????????dic.Add(".AspNetCore.Culture", "zh-CN");
???????????string param = JsonConvert.SerializeObject(obj_model);
???????????System.Net.HttpWebRequest request;
???????????request = (System.Net.HttpWebRequest)WebRequest.Create(url);
???????????request.Method = "POST";
???????????request.ContentType = "application/json;charset=UTF-8";
???????????if (dic != null && dic.Count != 0)
???????????{
???????????????foreach (var item in dic)
???????????????{
???????????????????request.Headers.Add(item.Key, item.Value);
???????????????}
???????????}
???????????byte[] payload;
???????????payload = System.Text.Encoding.UTF8.GetBytes(param);
???????????request.ContentLength = payload.Length;
???????????string strValue = "";
???????????try
???????????{
???????????????Stream writer = request.GetRequestStream();
???????????????writer.Write(payload, 0, payload.Length);
???????????????writer.Close();
???????????????System.Net.HttpWebResponse response;
???????????????response = (System.Net.HttpWebResponse)request.GetResponse();
???????????????System.IO.Stream s;
???????????????s = response.GetResponseStream();
???????????????string StrDate = "";
???????????????StreamReader Reader = new StreamReader(s, Encoding.UTF8);
???????????????while ((StrDate = Reader.ReadLine()) != null)
???????????????{
???????????????????strValue += StrDate;
???????????????}
???????????}
???????????catch (Exception e)
???????????{
???????????????strValue = e.Message;
???????????}
???????????return strValue;
HttpWebRequest 自定义header，Post发送请求，请求形式是json，坑爹的代码
原文地址：https://www.cnblogs.com/topguntopgun/p/10122345.html