I have a OpenFileDialog and its MultiSelect property is ON. My question is how can I limit the number of items to be selected, for example 5 items only?
Thanks
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3 Answers
You can use the FileOk event to check the file(s) selected by the user when he clicks the OK button. If you are not happy then display a message and set the CancelEventArgs.Cancel property to True to prevent the dialog from closing. Like this:
Dim dlg As New OpenFileDialog() dlg.Multiselect = True AddHandler dlg.FileOk, Sub(s, ce) If dlg.FileNames.Length > 5 Then MessageBox.Show("Please select no more than 5 files") ce.Cancel = True End If End Sub If dlg.ShowDialog = Windows.Forms.DialogResult.OK Then '' etc... End If 4 Comments
elvinguitar
I have a problem with this. If I selected only 5 photos, the messagebox is still popping up. If i selected only 1 photo, the messagebox still shows
Hans Passant
You must be doing it wrong, no idea what. Use the debugger, look at the value of dlg.FileNames
elvinguitar
where can I find the debugger? Sorry, but I'm new to VB
elvinguitar
I already got it. I used
Filename instead of Filenames sorry for that.You cannot. But you have alternatives:
1.- A good alternative could be to put all file names in a text file, and then accept that text file as your program's input.
2.- You should allow user to pick the directory. Then you list all the files and let them select as many files, there will not be any problem.
3.- You may have to use a FolderBrowserDialog instead and then use IO.Directory.GetFiles, which works properly.
Comments
There is no built-in feature for that in OpenFileDialog as far as I can see. Possible solution is to check FileNames returned from the dialog. If it count more than 5, for example, alert user and stop without operating the files.
