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RadChart has been replaced by RadHtmlChart, Telerik's client-side charting component. If you are considering RadChart for new development, examine the RadHtmlChart documentation and online demos first to see if it will fit your development needs. If you are already using RadChart in your projects, you can migrate to RadHtmlChart by following these articles: Migrating Series, Migrating Axes, Migrating Date Axes, Migrating Databinding, Features parity. Support for RadChart is discontinued as of Q3 2014, but the control will remain in the assembly so it can still be used. We encourage you to use RadHtmlChart for new development.

Gridlines are auxiliary lines that form a grid for easier reading of the chart. Gridlines can be vertical or horizontal. Vertical gridlines are controlled by the XAxis and horizontal gridlines are controlled by YAxis and YAxis2. Gridlines can be "major", e.g. falling on the labeled axis Step values."Minor" gridlines appear for YAxisand YAxis2 that fall between Step values. See the figure below where major gridlines fall on 20 and 40 of the YAxis and minor gridlines fall between the major gridlines.

To control the visibility and general appearance of gridlines use the the PlotArea.<axis>.Appearance property to reach MajorGridLines and MinorGridlines properties.XAxis has only MajorGridLines while YAxis have both MajorGridLines and MinorGridlines properties.Both major and minor gridline objects include the following properties:

  • Visible

  • Color

  • PenStyle (Solid, Dash, Dot, DashDot, DashDotDot and Custom)

  • Width

In the example below both X axis and Y axis are visible.XAxis MajorGridLines are red solid lines 3 pixels wide. YAxisMinorGridlines are shown as blue dotted lines 2 pixels wide and YAxisMajorGridLines are shown as blue solid lines 3 pixels wide.

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