Here is the documentation Jenny was referring to:
http://doc.xceedsoft.com/products/XceedWpfDataGrid/Displaying%20Tooltips.html
The example demonstrates how to add a ToolTip on any DataCell so that it displays its content as its ToolTip.
If you want to do the same thing on the column headers, you can do the style on ColumnManagerCell instead.
For example:
<Style TargetType="{x:Type xcdg:ColumnManagerCell}" >
<Setter Property="ToolTip"
Value="{Binding RelativeSource={RelativeSource Self}, Path=Content}" />
</Style>
If you want a specific ToolTip on a specific column, you need to use DataTriggers.
For example:
<Style TargetType="{x:Type xcdg:ColumnManagerCell}" >
<Style.Triggers>
<DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Path=FieldName}"
Value="Col1Name" >
<Setter Property="ToolTip" Value="ToolTip for Col1" />
</DataTrigger>
<DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Path=FieldName}"
Value="Col2Name" >
<Setter Property="ToolTip" Value="ToolTip for Col2" />
</DataTrigger>
</Style.Triggers>
</Style>
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Diane Lafontaine
Technical Support
Xceed Software Inc.