Using the open file and save file dialogs in vb.net

Question

Once a user has selected a file with the open file dialog, how can I handle this action? For example, if the user has selected a .txt file and has opened it, how can it get the

Answer 1

Dim dlg_open As New OpenFileDialog()
If (dlg_open.Show() <> DialogResult.OK) Then Return

'if a textfile, then
Dim content As String() = IO.File.ReadAllLines(dlg_open.FileName)

'if an image, then
Dim img As New Bitmap(dlg_open.FileName)

You should put Try...Catch blocks around all operations dealing with IO, you will not be able to prevent all exceptions.