Checking if a website has been updated

[H-Des]

Doe anyone know how I can check if a html document on a webserver is modified since my last check? I can't figure it out my self

I'm using visual studio 2005.

Thanks in advance,

H-Des


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[Herfried K. Wagner [MVP]]

Doe anyone know how I can check if a html document on a webserver is
modified since my last check? I can't figure it out my self

Download the file using 'WebClient.DownloadFile' or the function presented
at <URL:http://dotnet.mvps.org/dotnet/code/net/#InternetLoadFile> and
compare the file's content to the content retreived before.

 

[Cor Ligthert [MVP]]

HDes,

Have a look at this sample. AFAIK is there is as well in the header a
property for the last time updated.

\\\not tested as is
dim conlength as string
Dim wbRq As HttpWebRequest = DirectCast(WebRequest.Create("Url"),
HttpWebRequest)
wbRq.Timeout = 2000
Try
Dim wbRs As HttpWebResponse = DirectCast(wbRq.GetResponse(),
HttpWebResponse)
Dim wbHCol As WebHeaderCollection = wbRs.Headers
For i As Integer = 0 To wbHCol.Count - 1
Dim header As String = wbHCol.GetKey(i)
Dim values As String() = wbHCol.GetValues(header)
If values.Length > 0 andalso header.Tolower = "content-lenght" Then
conlenght = values(0)
End If
Next
wbRs.Close()
Catch
conlength = "?"
End Try
///

I hope this helps a little bit?

Cor