The HeatMap allows you to visually select its cells by rendering a border around the cell when the selection functionality is enabled.
By default, cell selection is disabled. To enable it, set the
SelectedCellBorderThickness properties of the HeatMap.
In order for the selection cell border to appear, you need to set all three properties.
SelectionMode property is an enumeration of type
HeatMapSelectionMode which provides the following values:
None—The selection is disabled.
SingleDataItem—Only a single data item can be selected with interaction.
MultipleDataItems—Multiple data items can be selected with interaction.
SelectedCellBorderColor property is of type
Color that gets or sets the color of the selection border.
SelectedCellBorderThickness property is of type
Thickness that gets or sets the thickness of the selection border.
Enabling the selection behavior of the RadHeatMap
<telerik:RadHeatMap SelectionMode="MultipleDataItems" SelectedCellBorderColor="Red" SelectedCellBorderThickness="2" />