<Window.Resources>
<local:ViewModel x:Key="viewmodel"/>
<local:BoolToVisibilityConverter x:Key="boolToVisibilityConverter"/>
</Window.Resources>
<!--Binding IsMouseOver property and Converter to the Visibility property of Button-->
<Syncfusion:GridTemplateColumn.CellTemplate>
<DataTemplate>
<Button Content="Click"
Syncfusion:FocusManagerHelper.FocusedElement="True"
Visibility="{Binding Path=IsMouseOver,
RelativeSource={RelativeSource FindAncestor,
AncestorType=Syncfusion:VirtualizingCellsControl},
Converter={StaticResource boolToVisibilityConverter }}" >
</Button>
</DataTemplate>
</Syncfusion:GridTemplateColumn.CellTemplate>
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please ignore this forum.