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Using Dates for X Values

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Aaron asked on 03 Aug 2010, 06:18 PM
It doesn't seem like you can use dates for X values when adding data to series programmatically.  Is that true?


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answered on 05 Aug 2010, 11:59 AM
Hello Aaron,

We would suggest you to review this online example here that demonstrates how you can display DateTime data on the numerical axes of RadChart -- the key is to use the DateTime.ToOADate() method in order to convert the DateTime data to double values as the numerical axes work only with numeric types.

Here is a sample code snippet as well:
RadChart1.PlotArea.XAxis.Appearance.LabelAppearance.RotationAngle = 340;
RadChart1.PlotArea.XAxis.Appearance.ValueFormat = Telerik.Charting.Styles.ChartValueFormat.ShortDate;
RadChart1.PlotArea.XAxis.AutoScale = false;
RadChart1.PlotArea.XAxis.AddRange(DateTime.Today.ToOADate(), DateTime.Today.AddDays(4).ToOADate(), 1);
ChartSeries series = new ChartSeries();
series.AddItem(new ChartSeriesItem(DateTime.Today.ToOADate(), 200));
series.AddItem(new ChartSeriesItem(DateTime.Today.AddDays(1).ToOADate(), 350));
series.AddItem(new ChartSeriesItem(DateTime.Today.AddDays(2).ToOADate(), 100));
series.AddItem(new ChartSeriesItem(DateTime.Today.AddDays(3).ToOADate(), 500));
series.AddItem(new ChartSeriesItem(DateTime.Today.AddDays(4).ToOADate(), 600));

Hope this helps.

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