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September 3rd, 2012, 08:48 AM
#1
Combo Boxes
Hi,
The following code gives an error - at run time
InvalidCastException was unhandled
Operator '=' is not defined for type 'DatarowView' and 'Nothing'
Code:
If Not Me.CmbTruckTyp.SelectedItem = Nothing Then
Select Case Me.CmbTruckTyp.SelectedItem.ToString
Case "Mercedes-Benz"
cmdMercBenzModels.Visible = True
cmbDafModels.Visible = False
Case "Daf"
cmdMercBenzModels.Visible = False
cmbDafModels.Visible = True
Case Else
cmdMercBenzModels.Visible = False
cmbDafModels.Visible = False
End Select
End If
any help please
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September 3rd, 2012, 10:50 PM
#2
Re: Combo Boxes
Try:
Code:
If Not Me.CmbTruckTyp.SelectedItem is Nothing Then
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September 4th, 2012, 05:20 AM
#3
Re: Combo Boxes
It didnt work!!
I even tried
Code:
If CmbTruckTyp.SelectedIndex > -1 Then
It never gives any error, however, both comboxes are visible regardless of "Daf" or "MEercedes-Benz" being selected..
Any help pelase
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September 4th, 2012, 10:39 AM
#4
Re: Combo Boxes
Like the other post, the ComboBox properties can be tricky. I would put a break on the If statement, hold the curser over CmbTruckTyp and find the property you want to test by looking at the values that actually exist.
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September 4th, 2012, 02:46 PM
#5
Re: Combo Boxes
Hi,
This worked for me. What event are you using?
Code:
Private Sub CmbTruckTyp_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CmbTruckTyp.SelectedIndexChanged
Try
If Not Me.CmbTruckTyp.SelectedItem = Nothing Then
Select Case Me.CmbTruckTyp.SelectedItem.ToString
Case "Mercedes-Benz"
cmdMercBenzModels.Visible = True
cmbDafModels.Visible = False
Case "Daf"
cmdMercBenzModels.Visible = False
cmbDafModels.Visible = True
Case Else
cmdMercBenzModels.Visible = False
cmbDafModels.Visible = False
End Select
End If
Catch ex As Exception
End Try
End Sub
Curt
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