C# post 请求发送json数据

C#post请求发送json数据包|get获取数据包

---

1. 将json数据存入HttpContent http容器
2. 设置http容器的存放头类型
3. 建立请求客户端(HttpClient)
4. 发送数据包(PostAsync)

      public string PostXmlResponse(string url, string xmlString)
        {
            HttpContent httpContent = new StringContent(xmlString);
            httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
            HttpClient httpClient = new HttpClient();
            HttpResponseMessage response = httpClient.PostAsync(url, httpContent).Result;
            if (response.IsSuccessStatusCode)
            {
                Task<string> t = response.Content.ReadAsStringAsync();
                return t.Result;
            }
            return string.Empty;
        }
        public static string ToJSON(object obj)
        {
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            return serializer.Serialize(obj);
        }
``` 
---
### C# get获取数据包

public static HttpWebResponse CreateGetHttpResponse(string url)
{
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.Method = “GET”;
request.ContentType = “application/x-www-form-urlencoded”;//链接类型
return request.GetResponse() as HttpWebResponse;
}
///

/// 从HttpWebResponse对象中提取响应的数据转换为字符串
///

///
///
public string GetResponseString(HttpWebResponse webresponse)
{
using (Stream s = webresponse.GetResponseStream())
{
StreamReader reader = new StreamReader(s, Encoding.UTF8);
return reader.ReadToEnd();
}
}
`

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