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HttpWebResponse.ContentLength Vlastnost

Definice

Obor názvů:
System.Net
Sestavení:
System.dll, System.Net.Requests.dll
Sestavení:
netstandard.dll, System.Net.Requests.dll
Sestavení:
System.Net.Requests.dll
Sestavení:
System.dll
Sestavení:
netstandard.dll
Zdroj:
HttpWebResponse.cs
Zdroj:
HttpWebResponse.cs
Zdroj:
HttpWebResponse.cs
Zdroj:
HttpWebResponse.cs
Zdroj:
HttpWebResponse.cs

Získá délku obsahu vráceného požadavkem.

public:
 virtual property long ContentLength { long get(); };
public override long ContentLength { get; }
member this.ContentLength : int64
Public Overrides ReadOnly Property ContentLength As Long

Hodnota vlastnosti

Int64

Počet bajtů vrácených požadavkem. Délka obsahu neobsahuje informace záhlaví.

Výjimky

ObjectDisposedException

Aktuální instance byla uvolněna.

Příklady

Následující příklad zobrazí hodnotu této vlastnosti.

using System;
using System.Net;
using System.Text;
using System.IO;

    public class Test
    {
        // Specify the URL to receive the request.
        public static void Main (string[] args)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(args[0]);

            // Set some reasonable limits on resources used by this request
            request.MaximumAutomaticRedirections = 4;
            request.MaximumResponseHeadersLength = 4;
            // Set credentials to use for this request.
            request.Credentials = CredentialCache.DefaultCredentials;
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            Console.WriteLine("Content length is {0}", response.ContentLength);
            Console.WriteLine("Content type is {0}", response.ContentType);

            // Get the stream associated with the response.
            Stream receiveStream = response.GetResponseStream();

            // Pipes the stream to a higher level stream reader with the required encoding format.
            StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8);

            Console.WriteLine("Response stream received.");
            Console.WriteLine(readStream.ReadToEnd());
            response.Close();
            readStream.Close();
        }
    }

/*
The output from this example will vary depending on the value passed into Main
but will be similar to the following:

Content length is 1542
Content type is text/html; charset=utf-8
Response stream received.
<html>
...
</html>

*/

Imports System.Net
Imports System.Text
Imports System.IO


    Public Class Test

        ' Specify the URL to receive the request.
        Public Shared Sub Main(ByVal args() As String)
        Dim request As HttpWebRequest = CType(WebRequest.Create(args(0)), HttpWebRequest)


        ' Set some reasonable limits on resources used by this request
        request.MaximumAutomaticRedirections = 4
        request.MaximumResponseHeadersLength = 4

        ' Set credentials to use for this request.
        request.Credentials = CredentialCache.DefaultCredentials

        Dim response As HttpWebResponse = CType(request.GetResponse(), HttpWebResponse)

        Console.WriteLine("Content length is {0}", response.ContentLength)
        Console.WriteLine("Content type is {0}", response.ContentType)

        ' Get the stream associated with the response.
        Dim receiveStream As Stream = response.GetResponseStream()

        ' Pipes the stream to a higher level stream reader with the required encoding format. 
        Dim readStream As New StreamReader(receiveStream, Encoding.UTF8)

        Console.WriteLine("Response stream received.")
        Console.WriteLine(readStream.ReadToEnd())
        response.Close()
        readStream.Close()
    End Sub
End Class
'
'The output from this example will vary depending on the value passed into Main 
'but will be similar to the following:
'
'Content length is 1542
'Content type is text/html; charset=utf-8
'Response stream received.
'...
'
'

Poznámky

Vlastnost ContentLength obsahuje hodnotu hlavičky Content-Length vrácenou odpovědí. Pokud hlavička Content-Length není v odpovědi nastavená, ContentLength nastaví se na hodnotu -1.

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