[RESOLVED] [2005] GroupBox Container issue?

[blakemckenna]

I have a Groupbox control on my form in which I have about 8 checkbox controls. One of the checkboxes, if checked, will make the rest of the checkboxes become checked. I have the following code that isn't working.

                For Each ctl As Control In gb1.Container.Components
                    If TypeOf (ctl) Is CheckBox Then
                        ctl.Checked = True   'Isn't working  
                    End If
                Next

With what I have above, "Checked" isn't a property of the "ctl". What am I doing wrong in this construct?

Thanks,

[nmadd]

Once you find that your Control is of type CheckBox, you have to cast that Control to an actual CheckBox. You don't actually have a CheckBox until you cast that Control to a CheckBox.

You get "Checked" isn't a property of the "ctl" because Checked really isn't a property of Control. Checked is a property of a CheckBox.

[blakemckenna]

nmadd,

I did what you suggested and still got an error, unless I did it wrong! Here's the code:

                For Each ctl As Control In gb1.Container.Components
                    If TypeOf (ctl) Is CheckBox Then
                        ctl = DirectCast(ctl, CheckBox)
                        ctl.checked = True        'Doesn't like this statement
                    End If
                Next

[Sunglasses Ron]

This should work......

CType(ctrl, CheckBox).Checked = True

Cheers

[blakemckenna]

Ok,

Now I'm getting the attached error message on the highlighted line:

                For Each ctl As Control In gb1.Container.Components
                    If TypeOf (ctl) Is CheckBox Then
                        ctl = DirectCast(ctl, CheckBox)
                        CType(ctl, CheckBox).Checked = False
                    End If
                Next

Thanks,

[blakemckenna]

nevermind, I saw my problem. SunglassesRon, your code worked to.

Thanks,

[Sunglasses Ron]

You don't need this line...

ctl = DirectCast(ctl, CheckBox)

[nmadd]

On a side note, it won't make much difference unless you're doing this a million times, but if you are certain that you are casting to the right type, DirectCast is faster.