HttpClientHandler 类

定义

public ref class HttpClientHandler : System::Net::Http::HttpMessageHandler

public class HttpClientHandler : System.Net.Http.HttpMessageHandler

type HttpClientHandler = class
    inherit HttpMessageHandler

Public Class HttpClientHandler
Inherits HttpMessageHandler

继承

Object

HttpMessageHandler

HttpClientHandler

派生

System.Net.Http.WebRequestHandler

示例

static async Task Main()
{
   // Create an HttpClientHandler object and set to use default credentials
   HttpClientHandler handler = new HttpClientHandler();
   handler.UseDefaultCredentials = true;

   // Create an HttpClient object
   HttpClient client = new HttpClient(handler);

   // Call asynchronous network methods in a try/catch block to handle exceptions
   try
   {
      HttpResponseMessage response = await client.GetAsync("http://www.contoso.com/");

      response.EnsureSuccessStatusCode();

      string responseBody = await response.Content.ReadAsStringAsync();
      Console.WriteLine(responseBody);
   }
   catch(HttpRequestException e)
   {
       Console.WriteLine("\nException Caught!");
       Console.WriteLine("Message :{0} ",e.Message);
   }

   // Need to call dispose on the HttpClient and HttpClientHandler objects
   // when done using them, so the app doesn't leak resources
   handler.Dispose();
   client.Dispose();
}

注解

有关此 API 的详细信息，请参阅 HttpClientHandler 的补充 API 备注。

另请参阅

• 连接到 Web 服务
• 快速入门：使用 HttpClient 进行连接
• 如何使用 HttpClient 处理程序
• 如何保护 HttpClient 连接