命令参数与数据网格的元素值的绑定

Question

Iam Trying to Bind "Description" column value of dataGrid to command parameter of a button inside same grid row but, Binding not working properly. code:-

   <DataGrid x:Name="devicelist" Background="SkyBlue" AutoGenerateColumns="False"  ItemsSource="{Binding Path=DeviceList}" SelectionChanged="devicelist_SelectionChanged"  >
 <DataGrid.Columns>  
                <!--Description-->
                <DataGridTextColumn Header="Descrition" Width="*"  IsReadOnly="True" Binding="{Binding Path=Description}">
                </DataGridTextColumn>                         
                          
                <!--testcaseSelection button-->
                <DataGridTemplateColumn Header="TestCases" Width="*" >
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <Button Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType= {x:Type Window}}, 
                             Path=DataContext.CurrentViewModel.SelectTestCommand}" CommandParameter="{Binding Path=Description}" >TestCases</Button>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
 </DataGrid.Columns>
</DataGrid>

the command that i have binded is working properly and getting called also.

Answer 1

As explained here , try to declare the CommandParameter before the Command :

<Button CommandParameter="{Binding Path=Description}"
        Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType= {x:Type Window}}, 
                          Path=DataContext.CurrentViewModel.SelectTestCommand}"
        Content="TestCases" />