[RESOLVED] Count the Number of Controls on a WPF Form

[trevorjeaton]

Hi again,

I'm looking to count the number of controls on a form within WPF. As usual, I have a working winforms example and I'm trying to get its WPF equivalent.

Here's the winforms code based on looking for a chart control:

Dim countnumberofcharts As Integer = 0
            For Each ctrl As Control In Me.Controls
                If TypeOf ctrl Is System.Windows.Forms.DataVisualization.Charting.Chart Then
                    countnumberofcharts = countnumberofcharts + 1
                End If
            Next

And I'm erroring out with "Controls is not a member of MyApp.ControlCountTest"

Thanks to all who have been assisting in my uphill battle of transitioning from winforms to WPF - its definitely an adventure.


Also, as a postscript, is there any known native charting controls for WPF or am I stuck trying to pull in the winforms charts within a wpf window?

[trevorjeaton]

okay so i changed my code to the following:

 Dim countnumberofcharts As Integer = 0
            For Each ctrl As Control In Me.grid1.Children
                If TypeOf ctrl Is Chart Then
                    countnumberofcharts = countnumberofcharts + 1
                End If
            Next

and specifying grid1.children seemed to help the for next loop itsef, but now its erroring out with the following:

"expression of type system.windows.controls.control can never be of type system.windows.forms.datavisualization.charting.chart"

I have all of the imports statements in place for the class - i'll keep digging as usual but if anybody has encountered trying to identify a chart as a control in wpf, i'm all ears.

Thanks.

[bflosabre91]

you can always just count by using the index. so like this:

For i as int32 = 0 to grid1.children.count - 1
  if grid1.children.item(i).gettype = gettype(Chart) then
    count = count + 1
  End If
next i

[trevorjeaton]

absolutely bang on - worked like a charm - thx