WebResponse.Headers 属性

定义

命名空间:

System.Net

程序集:

System.Net.Requests.dll

Source:

WebResponse.cs

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。

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

WebHeaderCollection 类的实例，包含与此响应关联的标头值。

例外

NotSupportedException

当未在子类中重写该属性时，试图获取或设置该属性。

示例

以下示例显示 中 WebResponse返回的所有标头名称/值对。

// 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

属性 Headers 包含响应中返回的名称-值标头对。

注意

类 WebResponse 是类 abstract 。 实例在运行时的实际行为 WebResponse 由 返回 WebRequest.GetResponse的后代类决定。 有关默认值和异常的详细信息，请参阅子代类的文档，例如 HttpWebResponse 和 FileWebResponse。

另请参阅

• WebHeaderCollection
• Headers