Legend Not Clearing Out Correctly.

[IDalton]

I am trying to refresh the grid and legend. When I try to refresh the grid it clears fine and the new data shows up but the legend keeps on adding more series and not matter what I do I can't seem to stop it adding more series instead of just showing one which is what I want.

I'm using chart1.Data.Clear() to clear the grid and legend,but the legend is not getting cleared.  what syntax do I need to get this to work?

Thanks

Ian

[Frank]

You need to add:

chart.Series.Clear()

Also, if your legend box is displaying axis sections, conditional attributes or custom gridlines you need to clear those too. Data.Clear only clears the values.

 

[IDalton]

I added that line of code and it didn't help my issue.  Everytime I rerun the process to load the chart it just adds another series.  Here is my code please let me know what I am missing (for some reason everytime I paste my code it duplicates!)

chartWARF.Data.Clear()

chartWARF.Series.Clear()

chartWARF.Gallery = ChartFX.WinForms.Gallery.Lines

chartWARF.DataSourceSettings.Fields.Add(New FieldMap("StartDate", FieldUsage.XValue))

chartWARF.DataSourceSettings.Fields.Add(New FieldMap("Result", FieldUsage.Value))

chartWARF.AxisY.Step = 50

chartWARF.AxisY.Min = Min - 100

chartWARF.AxisY.Max = Max + 100

chartWARF.DataSource = dsChartWARF.Tables("Data")

chartWARF.AxisY.Step = 50

chartWARF.AxisY.Min = Min - 100

chartWARF.AxisY.Max = Max + 100

chartWARF.DataSource = dsChartWARF.Tables("Data")

chartWARF.DataSourceSettings.Fields.Add(New FieldMap("Result", FieldUsage.Value))

chartWARF.AxisY.Step = 50

chartWARF.AxisY.Min = Min - 100

chartWARF.AxisY.Max = Max + 100

chartWARF.DataSource = dsChartWARF.Tables("Data")

chartWARF.AxisY.Step = 50

chartWARF.AxisY.Min = Min - 100

chartWARF.AxisY.Max = Max + 100

chartWARF.DataSource = dsChartWARF.Tables("Data")

[Frank]

Here is the problem:

chartWARF.DataSourceSettings.Fields.Add(New FieldMap("StartDate", FieldUsage.XValue))

chartWARF.DataSourceSettings.Fields.Add(New FieldMap("Result", FieldUsage.Value))

You are adding these every time. You need to clear the Fields Collection.

chartWARF.DataSourceSettings.Fields.Clear();

If you want to start over.

 

[IDalton]

Thank you that worked.

[Frank]

Excellent!

[cpelow]

How about for a statistics legend because I can clear everything but the legend?  I end up with two legends on my postback:

my code:

ControlChart.DataSourceSettings.Fields.Clear()

ControlChart.Series.Clear()

Dim statisticsControl As Statistics = New Statistical.Statistics

statisticsControl.Studies.Clear()

statisticsControl.Chart = ControlChart

statisticsControl.Chart.Data.Clear()

statisticsControl.LegendBox.Visible =

True

 

ControlChart.Data.Clear()

ControlChart.Titles.Clear()

ControlChart.LegendBox.Visible = False

 Please help?

 

[Frank]

Either do this if !IsPostBack or do:

chart.Extensions.Clear();

 

[cpelow]

Perfect. Thank you!

[kort]

Hi all,

 I Have some pb with Legend when I change my binding object

I'm doing like that :

chart1.Reset();

chart1.Data.Clear();chart1.Series.Clear();

chart1.AxesX.Clear();

chart1.AxesY.Clear();

 

chart1.DataSourceSettings.Fields.Clear();

chart1.Extensions.Clear();ChartFX.WinForms.DataProviders.ListProvider l = new ListProvider(list);

CrosstabDataProvider cfxCT = new CrosstabDataProvider();cfxCT.DataSource = l;

 

chart1.DataSourceSettings.Fields.Add(new FieldMap("name", FieldUsage.ColumnHeading));

chart1.DataSourceSettings.Fields.Add(new FieldMap("date", FieldUsage.RowHeading));

chart1.DataSourceSettings.Fields.Add(new FieldMap("Last", FieldUsage.Value));

chart1.DataSourceSettings.DataSource = cfxCT;

 

but I have always the same Legend

Thank you for any help