[RESOLVED] Howto reset a chart programatically

Hi all,

Hope someone can assist with this query :-

I've a chart control on a windows form & am using the following code to populate it :-

Code:

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' Create a data series
Dim series1 As New Series()
Dim series2 As New Series()
Dim series3 As New Series()

' Add data points to the first series
            series1.Points.Add(L_Data_1)
            series2.Points.Add(L_Data_2)
            series3.Points.Add(L_Data_3)

' Add series to the chart
            Chart.Series.Add(series1)
            Chart.Series.Add(series2)
            Chart.Series.Add(series3)

' Charting the main results Graph
            Chart.Series(1)("DrawingStyle") = "Wedge" 
            Chart.Series(1).Color = Color.Green
            Chart.Series(1).Font = New Font("Microsoft Sans Serif", 12, FontStyle.Bold)
            Chart.Series(1).Label = L_Data_1

            Chart.Series(2)("DrawingStyle") = "Wedge"
            Chart.Series(2).Color = Color.Yellow
            Chart.Series(2).Font = New Font("Microsoft Sans Serif", 12, FontStyle.Bold)
            Chart.Series(2).Label = L_Data_3

            Chart.Series(3)("DrawingStyle") = "Wedge" 
            Chart.Series(3).Color = Color.Red
            Chart.Series(3).Font = New Font("Microsoft Sans Serif", 12, FontStyle.Bold)
            Chart.Series(3).Label = L_Data_3

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The data to populate the chart is supplied by the user & then the above code is actioned from a button click event.

I am looking for the user to be able to change the data that is inputted & re-run the graph, so my question is - how do I create a new instance of the chart each time the button is clicked ?

Many thanks for any pointers.

Ciao

Charlie

You don't need to create a new instance of the chart - you just need to clear the Points collection from the series and add the new data. You can then call ResetAutoValues to ensure the Axes are correctly labelled.

Thanks for the help :) it worked a charm.