C# 调用WebApi

待我称王封你为后i 2022-05-25 11:40 201阅读 0赞

Post：

private void button1_Click(object sender, EventArgs e)
            {
               string ss= HttpPost("http://localhost:41558/api/Demo/PostXXX", "{Code:\"test089\",Name:\"test1\"}");
            }
    
            public static string HttpPost(string url, string body)
            {
                //ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
                Encoding encoding = Encoding.UTF8;
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.Method = "POST";
                request.Accept = "text/html, application/xhtml+xml, */*";
                request.ContentType = "application/json";
    
                byte[] buffer = encoding.GetBytes(body);
                request.ContentLength = buffer.Length;
                request.GetRequestStream().Write(buffer, 0, buffer.Length);
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
                {
                    return reader.ReadToEnd();
                }
            }

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Get：

private void button1_Click(object sender, EventArgs e)
            {
                string ss = HttpGet("http://localhost:41558/api/Demo/GetXXX?Name=北京");
            }
    
            public static string HttpGet(string url)
            {
                //ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
                Encoding encoding = Encoding.UTF8;
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.Method = "GET";
                request.Accept = "text/html, application/xhtml+xml, */*";
                request.ContentType = "application/json";
    
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
                {
                    return reader.ReadToEnd();
                }
            }

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2.HttpClient 方式

Post:

private async void button2_Click(object sender, EventArgs e)
    {
         HttpClient client = new HttpClient();
         //由HttpClient发出Delete Method
         HttpResponseMessage response = await client.DeleteAsync("http://localhost:41558/api/Demo"+"/1");
         if (response.IsSuccessStatusCode)
             MessageBox.Show("成功");
    }
    
    private async void button3_Click(object sender, EventArgs e)
    {
         //创建一个处理序列化的DataContractJsonSerializer
         DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(People));
         MemoryStream ms = new MemoryStream();
         //将资料写入MemoryStream
         serializer.WriteObject(ms, new People() { Id = 1, Name = "Hello ni" });
         //一定要在这设定Position
         ms.Position = 0;
         HttpContent content = new StreamContent(ms);//将MemoryStream转成HttpContent
         content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");
         HttpClient client = new HttpClient();
         //由HttpClient发出Put Method
         HttpResponseMessage response = await client.PutAsync("http://localhost:41558/api/Demo"+ "/1", content);
         if (response.IsSuccessStatusCode)
             MessageBox.Show("成功");
    }

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Get:

using (WebClient client = new WebClient())
    {
         client.Headers["Type"] = "GET";
         client.Headers["Accept"] = "application/json";
         client.Encoding = Encoding.UTF8;
         client.DownloadStringCompleted += (senderobj, es) =>
         {
             var obj = es.Result;
         };
         client.DownloadStringAsync("http://localhost:41558/api/Demo");
    }

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原文地址： [https://blog.csdn.net/qq\_23502409/article/details/76152501][https_blog.csdn.net_qq_23502409_article_details_76152501]

[https_blog.csdn.net_qq_23502409_article_details_76152501]: https://blog.csdn.net/qq_23502409/article/details/76152501