Check if file exists at url..

[Lanc1988]

Is it possible to have my program, when a button is clicked, check a url for a file and if it exists then it will say something in the status label on my form, or if it doesn't then it will say something else?

Example url:
http://www.site.com/files/filename.msi

 

[Lanc1988]

and if the file exists then it would bring up a message box with Ok and Cancel and asking do you want to start the download for this file.

 

[DiverDan]

Yes, look into the System.Net.HttpWebRequest and System.Net.HttpWebResponse functions.

I don't have a sample of checking if a URL file exists, but this snippet might help.

Imports System.Net

Dim installedDate, onlineDate As Integer
Dim wRequest As HttpWebRequest = HttpWebRequest.Create("http://www.myURL.com/myFile.exe")
Dim wResponse As HttpWebResponse = wRequest.GetResponse

installedDate = CInt(File.GetLastWriteTime(Application.StartupPath & "\myFile.exe").ToOADate)
onlineDate = CInt(wResponse.LastModified.ToOADate)
wResponse.Close()

If onlineDate > installedDate Then
'blah
End If