[RESOLVED] [2008] Stop activecontrol checkbox from becoming checked

[rhijaen]

Hi all..

Let me start out by saying my skill with vb .net is somewhere between unexperienced and slightly experienced, so don't go to hard on me

I have around 100 checkboxes on my form and when checked or unchecked they need do something depending on the state of the checkbox.

Looking at my code below you can see after the else statement that if the condition isn't true, I want the checkbox to remain unchecked.

Help me out here guys..I think I need to do something with an event handler?

    Private Sub chkAir_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chkDustDevil.CheckedChanged, chkLightningBolt.CheckedChanged, 'etc etc
        chkboxstatus()
    End Sub

    Private Sub chkboxstatus()
        If ActiveControl.Tag = "c" Then
            txtCharSkillPts.Text = txtCharSkillPts.Text + txtSpellSkillPts.Text
            ActiveControl.Tag = "u"
        Else
            If txtCharSkillPts.Text >= txtSpellSkillPts.Text Then
                txtCharSkillPts.Text = txtCharSkillPts.Text - txtSpellSkillPts.Text
                ActiveControl.Tag = "c"
            Else
                'don't allow checkbox to be checked
            End If
        End If
    End Sub

[obi1kenobi]

You can either make the checkbox's Enabled property False, or its Checked property False. Both should work, but in order to give a better solution you need to provide us with more info on EXACTLY what you want to do and when to do it.

[Dnereb]

Your exact problem is not clear to me but you've said you want youre checkbox to remain unchecked (strange but everthing goes nah?)

Step 1 make a boolean on formlevel CheckChangeInprocess
this boolean flags if you are already busy in a check changed event so you don't run the event triggering it again

Watch this:

Dim CheckChangeInprocess as boolean

Private Sub chkAir_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chkDustDevil.CheckedChanged, chkLightningBolt.CheckedChanged, 'etc etc
        
if CheckChangeInprocess  then exit sub
     CheckChangeInprocess = True
     chkboxstatus()
     CheckChangeInprocess  = False
End Sub

Private Sub chkboxstatus()
        If ActiveControl.Tag = "c" Then
            txtCharSkillPts.Text = txtCharSkillPts.Text + txtSpellSkillPts.Text
            ActiveControl.Tag = "u"
        Else
            If txtCharSkillPts.Text >= txtSpellSkillPts.Text Then
                txtCharSkillPts.Text = txtCharSkillPts.Text - txtSpellSkillPts.Text
                ActiveControl.Tag = "c"
            Else
                chkAir_CheckedChanged.Checked = False
            End If
        End If
 End Sub

the boolean CheckChangeInprocess prevents triggering the code to run again when you set the checkbox.check to false

[stimbo]

I'm not entirely sure what you mean but i think what you want to do is put this line in the Else statement:

DirectCast(ActiveControl, CheckBox).Checked = False

However, this may lead to problems so be careful.

I also notice you are doing maths on Strings... Shouldn't you be converting your values in the text property of the textboxes to Integers or Doubles (whichever suits).

[rhijaen]

Oh sorry I didn't explain myself clearly I guess..

In order to keep the code neater and not have hundreds of lines just for checkboxes, I have checkboxes grouped into groupboxes and am putting all the checkboxes in that group in the handles..

This is the full sub..

    Private Sub chkAir_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chkDustDevil.CheckedChanged, chkLightningBolt.CheckedChanged, chkWordofRecall.CheckedChanged, chkCallLightning.CheckedChanged, chkChainLightning.CheckedChanged, chkVortexofAir.CheckedChanged, chkNimbleness.CheckedChanged, chkElectricShield.CheckedChanged, chkStaticShield.CheckedChanged, chkInivisibility.CheckedChanged, chkSWGateway.CheckedChanged, chkHightowerGateway.CheckedChanged, chkMylanthiaGateway.CheckedChanged, chkTornado.CheckedChanged, chkHurricane.CheckedChanged, chkFogofIllusion.CheckedChanged, chkSuffocate.CheckedChanged, chkAirMasteryI.CheckedChanged, chkNimbusCloud.CheckedChanged
        RetrievespellDetails(ActiveControl.Text)
        chkboxstatus()
    End Sub

So there is no checkbox named chkAir, just all the checkboxes are in the handle

I'm not entirely sure what you mean but i think what you want to do is put this line in the Else statement:

DirectCast(ActiveControl, CheckBox).Checked = False

However, this may lead to problems so be careful.

I also notice you are doing maths on Strings... Shouldn't you be converting your values in the text property of the textboxes to Integers or Doubles (whichever suits).

Thank you, this seems to work well.