Hide checkbox until mouseover and make it stay once checked WPF - wpf

Question

The checkbox is invisible until I mouse over which is what I want, but now I want it to stay visible once it is checked. I've tried implementing a multi trigger, but it doesn't seem to be working:
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<CheckBox Name="cbkSelect"
IsChecked="{Binding Path=IsSelectedForOrder, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}">
<CheckBox.Style>
<Style TargetType="{x:Type CheckBox}">
<Setter Property="Visibility" Value="Hidden"/>
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsMouseOver, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}}}" Value="True"></Condition>
<Condition Binding="{Binding IsChecked, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}}}" Value="True"></Condition>
</MultiDataTrigger.Conditions>
<MultiDataTrigger.Setters>
<Setter Property="Visibility" Value="Visible"/>
</MultiDataTrigger.Setters>
</MultiDataTrigger>
</Style.Triggers>
</Style>
</CheckBox.Style>
</CheckBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>

Answer 1

A MultiDataTrigger will only apply the setter when all conditions are met.
Represents a trigger that applies property values or performs actions when the bound data meet a set of conditions.
Apart from that, binding to the DataGridRow does not work, as it has no IsChecked property. Instead, add a Trigger that acts on the IsChecked property of the associated CheckBox.
<Style TargetType="{x:Type CheckBox}">
<Setter Property="Visibility" Value="Hidden"/>
<Style.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter Property="Visibility" Value="Visible"/>
</Trigger>
<DataTrigger Binding="{Binding IsMouseOver, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}}}" Value="True">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>