How to use a Check box in VB.Net code

Question

Hi All,

I have a form with six Check boxes named chkCol1 to chkCol6 and I have a For/Next loop using a numeric variable called vCol.
I want to be able to set or clear any check box using the vCol variable as a reference, something like :-

**Controls("chkCol" & vCol).Checked = True**

except that this does not work. Is there any way to do this?

Peter Hibbs.

Answer 1

This should work:

CType(Controls("chkCol" & vCol), CheckBox).Checked = True

But if the controls are placed inside of some panel or groupbox, then specify the parent container, for example:

CType(GroupBox1.Controls("chkCol" & vCol), CheckBox).Checked = True

Or try a solution that searches all of the controls by name:

CType(Controls.Find("chkCol" & vCol, True)(0), CheckBox).Checked = True

Answer 2

You could try something like this

Private Sub UncheckColCheckBoxes()
    Dim controlNames = {"chkCol1", "chkCol2", "chkCol3", "chkCol4", "chkCol5", "chkCol6"}
    For Each name As String In controlNames
        If Me.Controls(name) IsNot Nothing Then
            DirectCast(Me.Controls(name), CheckBox).Checked = False
        End If
    Next
End Sub

Answer 3

Hi Viorel-1

Thanks for that, it worked perfectly.

Hi vb2ae,

Thanks for your code, I have saved that as it could well be useful later on in my project.

Peter Hibbs.