C# 调用WebApi-白红宇

C# 调用WebApi

阅读量：5282 次

发布时间：2019-06-14

本文共 4580 字，大约阅读时间需要 15 分钟。

1.WebRequest方式

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(); } }

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(); } }

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"); }

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"); }

WebAPI接收处理(方法没用参数，不喜欢用参数，反而觉得不好控制)

public class DefaultController : ApiController

{

// GET api/values/5

public List<Site> Get()

{

string Name = System.Web.HttpContext.Current.Request["Name"].ToString();

var sites = new List<Site>();

sites.Add(new Site { SiteId = 1, Title = "test", Uri = "www.cnblogs.cc" });

sites.Add(new Site { SiteId = 2, Title = "博客园首页", Uri = "www.cnblogs.com" });

sites.Add(new Site { SiteId = 3, Title = "博问", Uri = "q.cnblogs.com" });

sites.Add(new Site { SiteId = 4, Title = "新闻", Uri = "news.cnblogs.com" });