C#使用HttpClient进行GET&POST

最新推荐文章于 2025-08-07 13:18:55 发布

玄道

最新推荐文章于 2025-08-07 13:18:55 发布

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分类专栏： C#新手入门文章标签： c# httpclient get post

本文链接：https://blog.youkuaiyun.com/wangyi1e/article/details/29204987

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本文提供了两种使用HttpClient类实现HTTP请求的方法：一种是通过GET方式从指定URL获取数据，并展示如何解析响应；另一种是通过POST方式发送数据到服务器并接收响应。

就放两个代码过来吧，稍微做个记录

这是通过HttpClient.GetAsync(uri)进行HTTP数据获取的方式，验证参数似乎需要添加在uri之后，所以这段代码在实际应用中需要进行部分更改，将uri及验证信息作为函数输入

        public async void HttpClientDoGet()
        {
            var uri = "http://api.wsncloud.com/device/v1/list?";
            var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.None };

            using (var httpclient = new HttpClient(handler))
            {
                httpclient.BaseAddress = new Uri(uri);
                httpclient.DefaultRequestHeaders.Accept.Clear();
                httpclient.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));

                HttpResponseMessage response = await httpclient.GetAsync("?ak=xxxxxxxxxxxxxxxxxxxx");
                
                if(response.IsSuccessStatusCode)
                {
                    Stream myResponseStream = await response.Content.ReadAsStreamAsync();
                    StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
                    string retString = myStreamReader.ReadToEnd();
                    myStreamReader.Close();
                    myResponseStream.Close();

                    MessageBox.Show(retString);
                }
            }
        }

这个则为通过HttpClient.PostAsync(ur1, content)获取HTTP数据的方法

        public async void HttpClientDoPost()
        {
            var uri = "http://api.wsncloud.com/sensor/v1/list?";
            var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.None };

            using (var httpclient = new HttpClient(handler))
            {
                httpclient.BaseAddress = new Uri(uri);
                var content = new FormUrlEncodedContent(new Dictionary<string, string>()
                   {
                       {"ak", "65fc7ca4fc441d26f71bf3d691b278c2"},
                       {"deviceId", "537eb34be4b022b7fbe19471"}
                   });

                var response = await httpclient.PostAsync(uri, content);

                string responseString = await response.Content.ReadAsStringAsync();
                MessageBox.Show(responseString);
            }
        }

Post和Get命令在实际使用中都可以用来获取服务器端的参数