C# 调用 WebApi

一.WebRequest方式

Post：

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();
    }
}
  

// 调用
string ss= HttpPost("http://localhost:41558/api/Demo/PostXXX", "{Code:"test089",Name:"test1"}");

Get：

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();
    }
}

// 调用
string ss = HttpGet("http://localhost:41558/api/Demo/GetXXX?Name=北京");

二.HttpClient 方式

Post:

     //提交数据操作
     //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");
         
         
     //删除操作         
     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"); 

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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*** No matter how far you go, looking back is also necessary. ***

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