What to do when user click msgbox button

[Chong]

Will anyone help me on how to catch a button when a user click on a msgbox()? Let's say I have this:

msgbox("You've entered the wrong password", MsgBoxStyle.Critical)

Now when the user click the "OK" button on that msgbox(), I want to catch that and do something else with it.

Any help is appreciated.

ljCharlie

[Crunch]

For example (cut from an app I work on):

Private Sub frmMain_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) _
    Handles MyBase.Closing
            Select Case MsgBox("This character has changed since it was last saved.  Do you want to save changes before exiting?", _
             MsgBoxStyle.YesNoCancel, "Warning")
                Case MsgBoxResult.Yes
                    'Save first
                    If Globals.strCharFileName = "" Then
                        If Me.dlgSave.ShowDialog = DialogResult.OK Then
                            Globals.SaveCharacter(Me.dlgSave.FileName)
                        End If
                    Else
                        Globals.SaveCharacter(strCharFileName)
                    End If
                    Me.Close()
                Case MsgBoxResult.No
                    'Quit without saving
                    Globals.Dirty = False
                    Me.Close()
                Case MsgBoxResult.Cancel
                    'Aborting
                    e.Cancel = True
            End Select
    End Sub

...although it has been pointed out that the .NET function is MessageBox.Show, you (and I also!) shouldn't be using msgbox any more. It works the same way though.

[dynamic_sysop]

like this...

If MessageBox.Show("You've entered the wrong password", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error) = DialogResult.OK Then
            '/// do stuff because OK was clicked
        End If

or with the old vb6 method of MsgBox ...

If MsgBox("You've entered the wrong password", MsgBoxStyle.OKOnly) = MsgBoxResult.OK Then
            '/// do stuff
        End If

[Chong]

Thank you very much! I didn't know that VB.NET change msgbox() to Message.Show(). And crucial point I missed is the DialogResult.OK or MsgBoxResult.OK.

Well, I'll give that try. I'm very sure it will work.

Again, thank you.

ljCharlie

[Crunch]

All DialogResult is is a built in enumeration of the different messagebox returns, you could just as easily use the number represented by each messagebox button (although I don't know what they are since I use DialogResult).

Public Enum MsgBoxResult As Integer
Member of: Microsoft.VisualBasic

Summary:
The MsgBoxResult enumeration contains constants used to identify which button was pressed on a message box displayed using the MsgBox function. These constants can be used anywhere in your code.

[Chong]

Yes, I remember using numbers in VB6 during my college years. However, it's quite hard to remember those numbers though. Well, it worked out okay now.

ljCharlie

[Chong]

By the way, is there an equivalent event for the .lostfocus in VB.NET? I thouht there is the .Leave but it wasn't working. Here's my situation.

In the txtUserName textbox, I set a KeyUp event to capture the Enter key. If the user hit the enter key, then move the focus to the txtPassword textbox. And in the txtPassword textbox I also setup a KeyUp event to catch the Enter key. If in the txtPassword the user hit the Enter key, then performclick on the btnOK button. Now the problem is, if the user type in the wrong password and the error messagbox popup and the user hit the Enter key again, the error messagebox kept on poping up. That is because the focus is still on the txtPassword textbox. So my question is, is there a way to lose the focus on that txtPassword textbox?

ljCharlie

[Memnoch1207]

That would be a very good reason NOT to use the enter key to move to the next field...use tab.

[Chong]

Thanks for the response, but almost 99% people don't use the Tab key. Normally people would use the Enter key. So I'm stock.

ljCharlie

[nemaroller]

Easy way:
Check for Enter in the passwordBox keypress event, and call your error message box there if they fail. There's no reason to check it in the Leave event is there?

Just to give you a more complex solution:

In our production enterprise application, the login form returns a userNominee. This is a user that is attempting authentication. The calling nominee is returned back to a class subroutine that actually called the login form.

If the user failed authentification, and has not attempted more than 3 times on this running instance, we create another login form, and they can try again.

Perhaps you could go that route.

[Chong]

I see what you're saying now. I'll give that a try and see what happens. Thanks!

ljCharlie