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Theme Resource Keys Reference

This reference lists TreeDataGrid XAML resource keys defined by shipped themes and where they are used.

Brush Keys

Key Used For
TreeDataGridGridLinesBrush grid lines and header separator visuals
TreeDataGridHeaderBackgroundPointerOverBrush header pointer-over background
TreeDataGridHeaderBackgroundPressedBrush header pressed background
TreeDataGridHeaderBorderBrushPointerOverBrush header pointer-over border
TreeDataGridHeaderBorderBrushPressedBrush header pressed border
TreeDataGridHeaderForegroundPointerOverBrush header pointer-over foreground
TreeDataGridHeaderForegroundPressedBrush header pressed foreground
TreeDataGridSelectedCellBackgroundBrush selected-row/cell background

Geometry Keys

Key Used For
TreeDataGridSortIconAscendingPath ascending sort icon in headers
TreeDataGridSortIconDescendingPath descending sort icon in headers
TreeDataGridItemCollapsedChevronPathData collapsed expander chevron
TreeDataGridItemExpandedChevronPathData expanded expander chevron

ControlTheme Keys

Key TargetType
{x:Type TreeDataGrid} TreeDataGrid
{x:Type TreeDataGridColumnHeader} TreeDataGridColumnHeader
{x:Type TreeDataGridRow} TreeDataGridRow
{x:Type TreeDataGridCheckBoxCell} TreeDataGridCheckBoxCell
{x:Type TreeDataGridExpanderCell} TreeDataGridExpanderCell
{x:Type TreeDataGridTextCell} TreeDataGridTextCell
{x:Type TreeDataGridTemplateCell} TreeDataGridTemplateCell
TreeDataGridExpandCollapseChevron ToggleButton theme used by expander cells

Override Example

<Application.Resources>
  <SolidColorBrush x:Key="TreeDataGridHeaderBackgroundPointerOverBrush" Color="#22007ACC"/>
  <StreamGeometry x:Key="TreeDataGridSortIconAscendingPath">M0,10 L5,0 10,10 Z</StreamGeometry>
</Application.Resources>

Troubleshooting

  • Resource key override has no effect Cause: key name mismatch or override is defined in a scope that is not used by the target control instance. Fix: confirm exact key spelling and verify resource-scope precedence (TreeDataGrid.Resources -> parent logical resources -> Application.Resources).

  • Sort/chevron icon disappears Cause: replacement geometry path is invalid. Fix: validate geometry syntax and test with a known-good path first.

API Coverage Checklist