C#用WebRequest访问webapi传送JSON串的方法

public static string CallWebApi(string Uri, string RequestJson)
{
//请求路径
string url = Uri;

        //定义request并设置request的路径WebRequest request = WebRequest.Create(url);request.Method = "post";//初始化request参数string postData = RequestJson;//设置参数的编码格式，解决中文乱码byte[] byteArray = Encoding.UTF8.GetBytes(postData);//设置request的MIME类型及内容长度request.ContentType = "application/json";request.ContentLength = byteArray.Length;//打开request字符流Stream dataStream = request.GetRequestStream();dataStream.Write(byteArray, 0, byteArray.Length);dataStream.Close();//定义response为前面的request响应WebResponse response = request.GetResponse();Stream myResponseStream = response.GetResponseStream();StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);string retString = myStreamReader.ReadToEnd();myStreamReader.Close();myResponseStream.Close();return retString;}

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