WebResponse.ContentLength 属性

定义

命名空间:

System.Net

程序集:

System.Net.Requests.dll

Source:

WebResponse.cs

当在子类中重写时，获取或设置接收的数据的内容长度。

public:
 virtual property long ContentLength { long get(); void set(long value); };

public virtual long ContentLength { get; set; }

member this.ContentLength : int64 with get, set

Public Overridable Property ContentLength As Long

属性值

Int64

从 Internet 资源返回的字节数。

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

以下示例使用 ContentLength 属性获取返回的资源的 Length。

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

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

// Display the content length and content type received as headers in the response object.
Console::WriteLine( "\nContent length : {0}, Content Type : {1}", myWebResponse->ContentLength, myWebResponse->ContentType );

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

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

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

// Display the content length and content type received as headers in the response object.
Console.WriteLine("\nContent length :{0}, Content Type : {1}", 
                             myWebResponse.ContentLength, 
                             myWebResponse.ContentType);  

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

' Create a 'WebRequest' 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()

' The ContentLength and ContentType received as headers in the response object are also exposed as properties.
   ' These provide information about the length and type of the entity body in the response.
Console.WriteLine(ControlChars.Cr + "Content length :{0}, Content Type : {1}", myWebResponse.ContentLength, myWebResponse.ContentType)
myWebResponse.Close()

注解

属性 ContentLength 包含来自 Internet 资源的响应的长度（以字节为单位）。 对于包含标头信息的请求方法， ContentLength 不包括标头信息的长度。

注意

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

另请参阅

• ContentLength