HttpVersion 类 
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
定义 HttpWebRequest 和 HttpWebResponse 类支持的 HTTP 版本号。
public ref class HttpVersion abstract sealed
	public ref class HttpVersion
	public static class HttpVersion
	public class HttpVersion
	type HttpVersion = class
	Public Class HttpVersion
		- 继承
 - 
				HttpVersion
 
示例
以下示例演示了 HttpVersion 的用法。
// HttpClient lifecycle management best practices:
// https://free.blessedness.top/dotnet/fundamentals/networking/http/httpclient-guidelines#recommended-use
using HttpClient client = new HttpClient();
using HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, "http://www.microsoft.com");
Console.WriteLine("Default HTTP request version is {0}", request.Version);
request.Version = HttpVersion.Version10;
Console.WriteLine("Request version after assignment is {0}", request.Version);
using HttpResponseMessage response = client.Send(request);
Console.WriteLine("Response HTTP version {0}", response.Version);
' HttpClient lifecycle management best practices:
' https://free.blessedness.top/dotnet/fundamentals/networking/http/httpclient-guidelines#recommended-use
Using client As New HttpClient()
    Using request As New HttpRequestMessage(HttpMethod.Get, "http://www.microsoft.com")
        Console.WriteLine("Default HTTP request version is {0}", request.Version)
        request.Version = HttpVersion.Version10
        Console.WriteLine("Request version after assignment is {0}", request.Version)
        Using response As HttpResponseMessage = client.Send(request)
            Console.WriteLine("Response HTTP version {0}", response.Version)
        End Using
    End Using
End Using
	注解
类 HttpVersion 定义 类支持的 HttpClient HTTP 版本。 HTTP 版本号用于控制 HTTP 的版本特定功能,例如管道和分块。
构造函数
| HttpVersion() | 
		 初始化 HttpVersion 类的新实例。  | 
        	
字段
| Unknown | 
		 定义用于未知 HTTP 版本的 Version 实例。  | 
        	
| Version10 | 
		 定义用于 HTTP 1.0 的 Version 实例。  | 
        	
| Version11 | 
		 定义用于 HTTP 1.1 的 Version 实例。  | 
        	
| Version20 | 
		 定义用于 HTTP 2.0 的 Version 实例。  | 
        	
| Version30 | 
		 定义 Version HTTP 3.0 的 实例。  |