Question

I am making a resturant menu in visual basic/studio 2012.
I am supposed to make the groups be visible and invisible if their checkboxes are checked or not.

Also I cannot make it compute anything except the first group.

This is the code I have made so far and the two errors I get:

Public Class frmMenu
Private Sub chkBurgers_CheckedChanged(sender As Object, e As EventArgs)
Handles chkBurgers.CheckedChanged

If chkBurgers.Checked Then
grpBurgers.Visible = True
Else
grpBurgers.Visible = False
End If
End Sub
Private Sub chkFries_CheckedChanged(sender As Object, e As EventArgs) Handles chkFries.CheckedChanged

If chkFries.Checked Then
grpFries.Visible = True
Else
grpFries.Visible = False
End If
End Sub
Private Sub chkDrinks_CheckedChanged(sender As Object, e As EventArgs) Handles chkDrinks.CheckedChanged

If chkDrinks.Checked Then
grpDrinks.Visible = True
Else
grpDrinks.Visible = False
End If
End Sub


Private Sub btnCompute_Click(sender As Object, e As EventArgs) Handles btnCompute.Click
Dim sum As Double

If chkBurgers.Checked Then
If radRegular.Checked Then
sum += 4.19
ElseIf radCheese.Checked Or radBacon.Checked Then
sum += 4.79
ElseIf radBaconandCheese.Checked Then
sum += 5.39
End If
End If

If chkFries.Checked Then
If radSmall.Checked Then
sum += 2.39
ElseIf radMedium.Checked Then
sum += 3.09
ElseIf radLarge.Checked Then
sum += 4.99
End If
End If

If chkDrinks Then
If radSoda.Checked Then
sum += 1.69
ElseIf radBottledWater Then
sum += 1.49
End If
End If
txtCost.Text = sum.ToString("C")
End Sub

End Class

Also I recieved two errors which are:
1 Value of type 'System.Windows.Forms.CheckBox' cannot be converted to 'Boolean'. C:\Vis2012\Resturant Menu\Resturant Menu\frmMenu.vb Resturant Menu

2 Value of type 'System.Windows.Forms.RadioButton' cannot be converted to 'Boolean'. C:\Vis2012\Resturant Menu\Resturant Menu\frmMenu.vb Resturant Menu

Answer 1

Solution.
PublicClass frmMenu
Private Sub chkBurgers_CheckedChanged(ByVal sender As Object, ByVal e As EventArgs)
HandleschkBurgers.CheckedChanged



IfchkBurgers.Checked Then
grpBurgers.Visible = True
Else
grpBurgers.Visible = False
End If
End Sub
Private Sub chkFries_CheckedChanged(ByValsender As Object,ByVal e As EventArgs) HandleschkFries.CheckedChanged

IfchkFries.Checked Then
grpFries.Visible = True
Else
grpFries.Visible = False
End If
End Sub
Private Sub chkDrinks_CheckedChanged(ByValsender As Object,ByVal e As EventArgs) HandleschkDrinks.CheckedChanged

IfchkDrinks.Checked Then
grpDrinks.Visible = True
Else
grpDrinks.Visible = False
End If
End Sub


Private Sub btnCompute_Click(ByValsender As Object,ByVal e As EventArgs) HandlesbtnCompute.Click
Dim sumAs Double

IfchkBurgers.Checked Then
IfradRegular.Checked Then
sum += 4.19
ElseIfradCheese.Checked Or radBacon.Checked Then
sum += 4.79
ElseIfradBaconandCheese.Checked Then
sum += 5.39
EndIf
End If

IfchkFries.Checked Then
IfradSmall.Checked Then
sum += 2.39
ElseIfradMedium.Checked Then
sum += 3.09
ElseIfradLarge.Checked Then
sum += 4.99
EndIf
End If


IfchkDrinks.Checked Then 'There was an error

IfradSoda.Checked Then
sum += 1.69
ElseIfradBottledWater.Checked Then 'There was an error

sum += 1.49
EndIf
End If
txtCost.Text = sum.ToString("C")
End Sub

EndClass