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CheckBox - How do I show my Three State checkbox to show the NULL state as a string value?

Posted on 2008-06-20
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Last Modified: 2011-10-03
I want to use a checkbox that informs the user that the NULL value is "Unknown". I know the code to show that "Yes" if the checkbox is true & "No" if false but how would I code the NULL value in my table to show "Unknown"? Is this possible? I am using a Visual Basic form and SQL database. The datatype is set to a BIT.
Private Sub LicenceAgreeCheckBox_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox.CheckedChanged
        If CheckBox.Checked = True Then
            CheckBox.Text = "Yes"
        Else
            CheckBox.Text = "No"
        End If
    End Sub

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Question by:teustace
2 Comments
 
LVL 18

Accepted Solution

by:
Joel Coehoorn earned 200 total points
ID: 21830678
Use the CheckState property:
Private Sub LicenceAgreeCheckBox_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox.CheckedChanged
    Select Case CheckBox.CheckState
        Case CheckState.Checked
            CheckBox.Checked = "True"
        Case CheckState.Indeterminate
            CheckBox.Checked = "Unknown"
        Case CheckState.Unchecked
            CheckBox.Checked = "False"
    End Select
End Sub

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Author Closing Comment

by:teustace
ID: 31469115
Hi Jcoehoorn, Many thanks! Works a treat and I can use this for other things....
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