WebResponse.ContentLength 屬性

定義

命名空間:

System.Net

組件:

System.Net.Requests.dll

來源:

WebResponse.cs

在子系類別中覆寫時，取得或設定正在接收資料的內容長度。

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

屬性值

Int64

傳回自網際網路資源的位元組數。

例外狀況

NotSupportedException

當屬性在子代類別中未覆寫時，會嘗試取得或設定該屬性。

範例

下列範例會 ContentLength 使用 屬性來取得傳回之資源的 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()

備註

屬性 ContentLength 包含來自因特網資源的回應長度，以位元組為單位。 對於包含標頭資訊的要求方法， ContentLength 不包含標頭信息的長度。

注意

類別 WebResponse 是類別 abstract 。 運行時間實例的實際行為是由 所WebRequest.GetResponse傳回的WebResponse子系類別所決定。 如需預設值和例外狀況的詳細資訊，請參閱 子系類別的檔，例如 HttpWebResponse 和 FileWebResponse。

另請參閱

• ContentLength