WebResponse.Headers 属性

定义

当在派生类中重写时,获取与此请求关联的标头名称/值对的集合。When overridden in a derived class, gets a collection of header name-value pairs associated with this request.

public:
 virtual property System::Net::WebHeaderCollection ^ Headers { System::Net::WebHeaderCollection ^ get(); };
public virtual System.Net.WebHeaderCollection Headers { get; }
member this.Headers : System.Net.WebHeaderCollection
Public Overridable ReadOnly Property Headers As WebHeaderCollection

属性值

WebHeaderCollection 类的实例,包含与此响应关联的标头值。An instance of the WebHeaderCollection class that contains header values associated with this response.

例外

当未在子类中重写该属性时,试图获取或设置该属性。Any attempt is made to get or set the property, when the property is not overridden in a descendant class.

示例

下面的示例显示在 WebResponse中返回的所有标头名称/值对。The following example displays all of the header name-value pairs returned in the WebResponse.

// Create a 'WebRequest' object with the specified url.
WebRequest^ myWebRequest = WebRequest::Create( "http://www.contoso.com" );

// Send the 'WebRequest' and wait for response.
WebResponse^ myWebResponse = myWebRequest->GetResponse();

// Display all the Headers present in the response received from the URl.
Console::WriteLine( "\nThe following headers were received in the response" );

// Display each header and its key , associated with the response object.
for ( int i = 0; i < myWebResponse->Headers->Count; ++i )
   Console::WriteLine( "\nHeader Name: {0}, Header value : {1}", myWebResponse->Headers->Keys[ i ], myWebResponse->Headers[ i ] );

// Release resources of response object.
myWebResponse->Close();


    // Create a 'WebRequest' object with the specified url. 	
   WebRequest myWebRequest = WebRequest.Create("http://www.contoso.com"); 

   // Send the 'WebRequest' and wait for response.
WebResponse myWebResponse = myWebRequest.GetResponse(); 

   // Display all the Headers present in the response received from the URl.
   Console.WriteLine("\nThe following headers were received in the response");

// Display each header and it's key , associated with the response object.
   for(int i=0; i < myWebResponse.Headers.Count; ++i)  
      Console.WriteLine("\nHeader Name:{0}, Header value :{1}",myWebResponse.Headers.Keys[i],myWebResponse.Headers[i]); 

   // Release resources of response object.
   myWebResponse.Close(); 
   

    ' Create a 'WebRequest' object with the specified url 	
    Dim myWebRequest As WebRequest = WebRequest.Create("www.contoso.com")
    
    ' Send the 'WebRequest' and wait for response.
    Dim myWebResponse As WebResponse = myWebRequest.GetResponse()
    
    ' Display all the Headers present in the response received from the URl.
    Console.WriteLine(ControlChars.Cr + "The following headers were received in the response")
    
    ' Headers property is a 'WebHeaderCollection'. Use it's properties to traverse the collection and display each header
    Dim i As Integer
    
    While i < myWebResponse.Headers.Count
        Console.WriteLine(ControlChars.Cr + "Header Name:{0}, Header value :{1}", myWebResponse.Headers.Keys(i), myWebResponse.Headers(i))
i = i + 1
    End While

    ' Release resources of response object.
    myWebResponse.Close()
    

注解

Headers 属性包含在响应中返回的名称-值标头对。The Headers property contains the name-value header pairs returned in the response.

备注

WebResponse 类是一个 abstract 类。The WebResponse class is an abstract class. 运行时 WebResponse 实例的实际行为取决于 WebRequest.GetResponse返回的子类。The actual behavior of WebResponse instances at run time is determined by the descendant class returned by WebRequest.GetResponse. 有关默认值和异常的详细信息,请参阅子代类的文档,例如 HttpWebResponseFileWebResponseFor more information about default values and exceptions, please see the documentation for the descendant classes, such as HttpWebResponse and FileWebResponse.

适用于

另请参阅