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Editorial Team
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Asked: 2026-06-08T07:50:10+00:00

I’m using the following code to allow my parts of chart to be selected

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I’m using the following code to allow my parts of chart to be selected and zoomed:

chart1.ChartAreas[0].CursorX.IsUserEnabled = true;
chart1.ChartAreas[0].CursorX.IsUserSelectionEnabled = true;
chart1.ChartAreas[0].AxisX.ScaleView.Zoomable = true;
chart1.ChartAreas[0].AxisX.ScrollBar.IsPositionedInside = true;

chart1.ChartAreas[0].CursorY.IsUserEnabled = true;
chart1.ChartAreas[0].CursorY.IsUserSelectionEnabled = true;
chart1.ChartAreas[0].AxisY.ScaleView.Zoomable = true;
chart1.ChartAreas[0].AxisY.ScrollBar.IsPositionedInside = true;

It works for a chart with both x and y axes of the type Integer.

enter image description here

But when I set the series value type to series1.XValueType = ChartValueType.Time;, I won’t be able to zoom in the x-axis.

enter image description here

When I set both axes value types for auto and add points using, for example, chart1.Series[0].Points.AddXY(DateTime.Now.ToLongTimeString(), rand.Next(10, 20));, then the zoom works.

How can I have my x-axis to be a Time and still be able to zoom?

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1 Answer

  1. Editorial Team

    Your zoom most likely does not work because your test time values are all too close to each other. The zoom must be able to pick a start and end point from the user selection. If start == end, a reasonable behaviour for the scale view is to do nothing.

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