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Validate  a mask edit box.

Posted on 2004-10-18
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Last Modified: 2010-04-23
I have a mask edit box for the purpose of entering a time, i.e. "10:15"

In Properties of the mask edit box,
Format is hh:mm
Mask is ##:##
It appears as this "__:__" on my form.

On a certain button click (calculate, to be precise), I want to verify that the user entered a time and did not just skip over that field leaving it blank.

The following three code-attempts do not work:
If mskTimeOut.Text = "##:##" Then
            MessageBox.Show("Please enter rental time out")
            mskTimeOut.Focus()
End If

If mskTimeOut.Text = "" Then
            MessageBox.Show("Please enter rental time out")
            mskTimeOut.Focus()
End If

If mskTimeOut.Text = "__:__" Then
            MessageBox.Show("Please enter rental time out")
            mskTimeOut.Focus()
End If

I have also tried to do a "textchanged" type of code, but it would not let me.

From what I am reading in my books and elsewhere on the internet about mask edit boxes, I gather that they are great for ensuring proper data entry format, but relatively useless for anything else.

Please tell me this is not true - there has to be a way to validate whether a user has entered into this box.
Thanks - A
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Question by:veigea41
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123654789987 earned 500 total points
ID: 12344745
Yes it is possible to validate a masked textbox. This is a good link where it has been implemented

http://www.c-sharpcorner.com/Code/2004/Jan/MaskedTextBoxControl.asp
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