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HttpWebResponse.LastModified Property

Gets the last date and time that the contents of the response were modified.

Namespace: System.Net
Assembly: System (in system.dll)

'Declaration
Public ReadOnly Property LastModified As DateTime
'Usage
Dim instance As HttpWebResponse
Dim value As DateTime

value = instance.LastModified

/** @property */
public DateTime get_LastModified ()

public function get LastModified () : DateTime

Property Value

A DateTime that contains the date and time that the contents of the response were modified.

Exception typeCondition

ObjectDisposedException

The current instance has been disposed.

The LastModified property contains the value of the Last-Modified header received with the response. The date and time are assumed to be local time.

This example creates an HttpWebRequest and queries for a response. This example then checks whether the entity requested had been modified any time today.

Dim myUri As New Uri(url)
' Creates an HttpWebRequest for the specified URL.
Dim myHttpWebRequest As HttpWebRequest = CType(WebRequest.Create(myUri), HttpWebRequest)
Dim myHttpWebResponse As HttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
If myHttpWebResponse.StatusCode = HttpStatusCode.OK Then
    Console.WriteLine(ControlChars.Lf + ControlChars.Cr + "Request succeeded and the requested information is in the response , Description : {0}", myHttpWebResponse.StatusDescription)
End If
Dim today As DateTime = DateTime.Now
' Uses the LastModified property to compare with today's date.
If DateTime.Compare(today, myHttpWebResponse.LastModified) = 0 Then
    Console.WriteLine(ControlChars.Cr + "The requested URI entity was modified today")
Else
    If DateTime.Compare(today, myHttpWebResponse.LastModified) =  1 Then
        Console.WriteLine(ControlChars.Cr + "The requested Uri was last modified on:{0}", myHttpWebResponse.LastModified)
    End If
End If
' Releases the resources of the response.
myHttpWebResponse.Close()

Uri myUri = new Uri(url);
// Creates an HttpWebRequest for the specified URL. 
HttpWebRequest myHttpWebRequest = (HttpWebRequest)
    WebRequest.Create(myUri);
HttpWebResponse myHttpWebResponse = (HttpWebResponse)
    myHttpWebRequest.GetResponse();

if (myHttpWebResponse.get_StatusCode().Equals(HttpStatusCode.OK)) {
    Console.WriteLine("\r\nRequest succeeded and the requested "
        + "information is in the response , Description : {0}", 
        myHttpWebResponse.get_StatusDescription());
}
DateTime today = DateTime.get_Now();
// Uses the LastModified property to compare with today's date.
if (DateTime.Compare(today,
    myHttpWebResponse.get_LastModified()) == 0) {
    Console.WriteLine("\nThe requested URI entity was modified "
        + "today");
}
else {
    if (DateTime.Compare(today, 
        myHttpWebResponse.get_LastModified()) == 1) {
        Console.WriteLine("\nThe requested URI was last "
            + "modified on:{0}",
            myHttpWebResponse.get_LastModified());
    }
}

// Releases the resources of the response.
myHttpWebResponse.Close();

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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