Validating Event of a Control does not allow to exit until value is entered

Question

0.00/5 (No votes)

See more:

I have a form in which there are many controls.I need to validate some of them for which I have written code on validating event.Below is the code of keydownevent from which validating event is called:

VB

Private Sub TxtVnum_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TxtVnum.KeyDown
        
        If (KeyCode = 13 Or KeyCode = 9) Then TxtVnum_Validating(TxtVnum, New System.ComponentModel.CancelEventArgs((False)))
    End Sub

Private Sub TxtVnum_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles TxtVnum.Validating

        If TxtVnum.Text = "" Then
            MsgBox("Enter Receipt Number")
            TxtVnum.Focus()
            Exit Sub
        End If
End Sub

Now if I press "Exit" button without entering Receipt Number, the above error keeps on coming until I enter number. What I need is if I press Exit button, form should get closed.
Which event I should use to do this task?
Please help me.

Posted 28-Mar-13 0:11am

Rachna0309

Add a Solution

Comments

ZurdoDev 28-Mar-13 7:25am

Why is your textbox keydown event firing when you click an Exit button?

Rachna0309 28-Mar-13 7:26am

It is firing validating event

ZurdoDev 28-Mar-13 7:27am

OK, just add CausesValidation="false" to your Exit button.

Rachna0309 28-Mar-13 7:38am

Still doesnt work...

ZurdoDev 28-Mar-13 7:48am

So, I go back to why is a KeyDown event getting called when a button is clicked. KeyDown is for when the textbox has focus and keys are being pressed on the keyboard. Why is it getting called when you click the Exit button?

Rachna0309 28-Mar-13 7:38am

What is the solution then?

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Bernhard Hiller · Answer 1 · 2013-03-28T01:54:00

Beyond setting the CausesValidation property of the exit button to false, also set the DialogResult of the form in the function handling the click event of the exit button before you call Close, e.g.

VB

Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
    DialogResult = Windows.Forms.DialogResult.Cancel
    Close()
End Sub

Then test for a DialogResult in your validation code

VB

Private Sub TxtVnum_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles TxtVnum.Validating
   If Me.DialogResult = Windows.Forms.DialogResult.None Then
        If TxtVnum.Text = "" Then
            MsgBox("Enter Receipt Number")
            TxtVnum.Focus()
            Exit Sub
        End If
    End If
End Sub