FileWebResponse.ContentLength Proprietà

Definizione

Spazio dei nomi:

System.Net

Assembly:

System.Net.Requests.dll

Origine:

FileWebResponse.cs

Ottiene la lunghezza del contenuto della risorsa del file system.

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

public override long ContentLength { get; }

member this.ContentLength : int64

Public Overrides ReadOnly Property ContentLength As Long

Valore della proprietà

Int64

Numero dei byte restituiti dalla risorsa del file system.

Esempio

Nell'esempio seguente viene utilizzata la ContentLength proprietà per ottenere la lunghezza del contenuto della risorsa del file system.

void GetPage( String^ url )
{
   try
   {
      Uri^ fileUrl = gcnew Uri( String::Concat( "file://", url ) );
      // Create a 'FileWebrequest' Object* with the specified Uri.
      FileWebRequest^ myFileWebRequest = (FileWebRequest^)( WebRequest::Create( fileUrl ) );
      // Send the 'fileWebRequest' and wait for response.
      FileWebResponse^ myFileWebResponse = (FileWebResponse^)( myFileWebRequest->GetResponse() );
      // Print the ContentLength and ContentType properties received as headers in the response Object*.
      Console::WriteLine( "\nContent length : {0}, Content Type : {1}", myFileWebResponse->ContentLength, myFileWebResponse->ContentType );
      // Release resources of response Object*.
      myFileWebResponse->Close();
   }
   catch ( WebException^ e ) 
   {
      Console::WriteLine( "\r\nWebException thrown. The Reason for failure is : {0}", e->Status );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "\nThe following Exception was raised : {0}", e->Message );
   }
}

public static void GetPage(String url)
 {
   try
     {
         Uri fileUrl = new Uri("file://"+url);
         // Create a 'FileWebrequest' object with the specified Uri.
         FileWebRequest myFileWebRequest = (FileWebRequest)WebRequest.Create(fileUrl);
         // Send the 'fileWebRequest' and wait for response.
         FileWebResponse myFileWebResponse = (FileWebResponse)myFileWebRequest.GetResponse();
         // Print the ContentLength and ContentType properties received as headers in the response object.
         Console.WriteLine("\nContent length :{0}, Content Type : {1}",myFileWebResponse.ContentLength,myFileWebResponse.ContentType);
         // Release resources of response object.
         myFileWebResponse.Close();
     }
   catch(WebException e)
     {
         Console.WriteLine("\r\nWebException thrown. The Reason for failure is : {0}",e.Status);
     }
   catch(Exception e)
     {
         Console.WriteLine("\nThe following Exception was raised : {0}",e.Message);
     }
}

Public Shared Sub GetPage(url As [String])
    
    Try
        Dim fileUrl As New Uri("file://" + url)
        ' Create a 'FileWebrequest' object with the specified Uri 
        Dim myFileWebRequest As FileWebRequest = CType(WebRequest.Create(fileUrl), FileWebRequest)
        ' Send the 'fileWebRequest' and wait for response.    
        Dim myFileWebResponse As FileWebResponse = CType(myFileWebRequest.GetResponse(), FileWebResponse)
        
        ' 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}", myFileWebResponse.ContentLength, myFileWebResponse.ContentType)
        myFileWebResponse.Close()
    Catch e As WebException
        Console.WriteLine(ControlChars.Lf + ControlChars.Cr + "The Reason for failure is : {0}", e.Status)
    Catch e As Exception
        Console.WriteLine(ControlChars.Cr + "The following exception was raised : {0}", e.Message)
    End Try

Commenti

La ContentLength proprietà contiene la lunghezza, in byte, della risorsa del file system.