The legend does not react when the visibility of one of the series changes in UI for WinForms

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The legend does not react when the visibility of one of the series changes

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ChartView

This is a migrated thread and some comments may be shown as answers.

2 Answers, 1 is accepted

answered on 23 May 2018, 12:28 PM

legend.png

legendinvalid.png

Pictures

answered on 24 May 2018, 10:52 AM

Hello, Valery,

By design, RadChartView doesn't hide the legend items if the associated series is hidden. However, it can be easily achieved. Here is demonstrated a sample code snippet:

public RadForm1()

{

InitializeComponent();

LineSeries barSeries = new LineSeries();

barSeries.LegendTitle = "Q1";

barSeries.DataPoints.Add(new CategoricalDataPoint(177, "Harley"));

barSeries.DataPoints.Add(new CategoricalDataPoint(128, "White"));

barSeries.DataPoints.Add(new CategoricalDataPoint(143, "Smith"));

barSeries.DataPoints.Add(new CategoricalDataPoint(111, "Jones"));

barSeries.DataPoints.Add(new CategoricalDataPoint(118, "Marshall"));

this.radChartView1.Series.Add(barSeries);

LineSeries barSeries2 = new LineSeries();

barSeries2.LegendTitle = "Q2";

barSeries2.DataPoints.Add(new CategoricalDataPoint(153, "Harley"));

barSeries2.DataPoints.Add(new CategoricalDataPoint(141, "White"));

barSeries2.DataPoints.Add(new CategoricalDataPoint(130, "Smith"));

barSeries2.DataPoints.Add(new CategoricalDataPoint(88, "Jones"));

barSeries2.DataPoints.Add(new CategoricalDataPoint(109, "Marshall"));

this.radChartView1.Series.Add(barSeries2);

this.radChartView1.ShowLegend = true;

}

private void radButton1_Click(object sender, EventArgs e)

{

this.radChartView1.Series[0].IsVisible = !this.radChartView1.Series[0].IsVisible;

foreach (LegendItemElement itemElement in this.radChartView1.ChartElement.LegendElement.StackElement.Children)

{

LineSeries s = itemElement.LegendItem.Element as LineSeries;

if (s != null)

{

if (s.IsVisible)

{

itemElement.Visibility = Telerik.WinControls.ElementVisibility.Visible;

}

else

{

itemElement.Visibility = Telerik.WinControls.ElementVisibility.Collapsed;

}

I hope this information helps. If you have any additional questions, please let me know.

Regards,
Dess
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