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();
? ? ? ? ? ? }
? ? ? ? }

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();
? ? ? ? ? ? }
? ? ? ? }

private async void button2_Click(object sender, EventArgs e)
{
? ? ?HttpClient client = new HttpClient();
? ? ?//由HttpClient發出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)
{
? ? ?//創建一個處理序列化的DataContractJsonSerializer
? ? ?DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(People));
? ? ?MemoryStream ms = new MemoryStream();
? ? ?//將資料寫入MemoryStream
? ? ?serializer.WriteObject(ms, new People() { Id = 1, Name = "Hello ni" });
? ? ?//一定要在這設定Position
? ? ?ms.Position = 0;
? ? ?HttpContent content = new StreamContent(ms);//將MemoryStream轉成HttpContent
? ? ?content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");
? ? ?HttpClient client = new HttpClient();
? ? ?//由HttpClient發出Put Method
? ? ?HttpResponseMessage response = await client.PutAsync("http://localhost:41558/api/Demo"+ "/1", content);
? ? ?if (response.IsSuccessStatusCode)
? ? ? ? ?MessageBox.Show("成功");
}

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");
}