HttpWebResponse.Headers 属性

定义

命名空间:

System.Net

程序集:

System.Net.Requests.dll

Source:

HttpWebResponse.cs

获取来自服务器的与此响应关联的标头。

public:
 virtual property System::Net::WebHeaderCollection ^ Headers { System::Net::WebHeaderCollection ^ get(); };

public override System.Net.WebHeaderCollection Headers { get; }

member this.Headers : System.Net.WebHeaderCollection

Public Overrides ReadOnly Property Headers As WebHeaderCollection

属性值

WebHeaderCollection

一个 WebHeaderCollection，包含与响应一起返回的标头信息。

例外

ObjectDisposedException

已释放当前实例。

示例

以下示例将所有响应标头的内容写入控制台。

// Creates an HttpWebRequest for the specified URL.
HttpWebRequest^ myHttpWebRequest = dynamic_cast<HttpWebRequest^>(WebRequest::Create( url ));

// Sends the HttpWebRequest and waits for response.
HttpWebResponse^ myHttpWebResponse = dynamic_cast<HttpWebResponse^>(myHttpWebRequest->GetResponse());

// Displays all the headers present in the response received from the URI.
Console::WriteLine( "\r\nThe following headers were received in the response:" );

// Displays each header and its key associated with the response.
for ( int i = 0; i < myHttpWebResponse->Headers->Count; ++i )
   Console::WriteLine( "\nHeader Name: {0}, Value : {1}",
      myHttpWebResponse->Headers->Keys[ i ],
      myHttpWebResponse->Headers[ (System::Net::HttpRequestHeader)i ] );

// Releases the resources of the response.
myHttpWebResponse->Close();

// Creates an HttpWebRequest for the specified URL.
HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);
// Sends the HttpWebRequest and waits for response.
HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();

// Displays all the headers present in the response received from the URI.
Console.WriteLine("\r\nThe following headers were received in the response:");
// Displays each header and it's key associated with the response.
for(int i=0; i < myHttpWebResponse.Headers.Count; ++i)
    Console.WriteLine("\nHeader Name:{0}, Value :{1}",myHttpWebResponse.Headers.Keys[i],myHttpWebResponse.Headers[i]);
// Releases the resources of the response.
myHttpWebResponse.Close();

' Creates an HttpWebRequest with the specified URL. 
Dim myHttpWebRequest As HttpWebRequest = CType(WebRequest.Create(url), HttpWebRequest)
' Sends the HttpWebRequest and waits for a response.
Dim myHttpWebResponse As HttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
' Displays all the Headers present in the response received from the URI.
Console.WriteLine(ControlChars.Lf + ControlChars.Cr + "The following headers were received in the response")
'The Headers property is a WebHeaderCollection. Use it's properties to traverse the collection and display each header.
Dim i As Integer
While i < myHttpWebResponse.Headers.Count
    Console.WriteLine(ControlChars.Cr + "Header Name:{0}, Value :{1}", myHttpWebResponse.Headers.Keys(i), myHttpWebResponse.Headers(i))
  i = i + 1
End While
myHttpWebResponse.Close()

注解

属性 Headers 是名称/值对的集合，其中包含响应返回的 HTTP 标头值。 从 Internet 资源返回的常见标头信息作为 类的属性 HttpWebResponse 公开。 下表列出了 API 公开为属性的常见标头。

标头	properties
Content-Encoding	ContentEncoding
Content-Length	ContentLength
Content-Type	ContentType
Last-Modified	LastModified
服务器	Server