Saving Value of CheckBox in DataGrid In Database

i Have Create a Checkbox in Datagrid

        <DataGrid  IsReadOnly="False"   x:Name="mygrid"  CanUserAddRows="False" HorizontalAlignment="Left" Margin="10,60,0,0" VerticalAlignment="Top" Height="215" Width="942" SelectionChanged="mygrid_SelectionChanged" CanUserResizeColumns="False" CanUserResizeRows="False" CanUserSortColumns="False" CanUserReorderColumns="False" AreRowDetailsFrozen="True" AutoGenerateColumns="False" Focusable="False" IsHitTestVisible="True" EnableRowVirtualization="False" >

            <DataGrid.Columns >

                <DataGridTemplateColumn >
                    <DataGridTemplateColumn.CellTemplate >
                        <DataTemplate >
                            <CheckBox Width="18" x:Name="TestCheckBox" IsEnabled="True"   />


                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

        



                <DataGridTextColumn IsReadOnly="True" Header="Book_Id" Binding="{Binding Book_Id}" ClipboardContentBinding="{x:Null}"/>
                <DataGridTextColumn  IsReadOnly="True" Header="Book_TiTle"  Binding="{Binding Book_Title}" ClipboardContentBinding="{x:Null}"/>
                <DataGridTextColumn IsReadOnly="True"  Header="Book_Author"  Binding="{Binding Book_Author}"  Width="*" ClipboardContentBinding="{x:Null}" CanUserReorder="False" CanUserResize="False" CanUserSort="False"/>
            </DataGrid.Columns>

        </DataGrid>

Now I want to save value of checkbox and  value of other columns Back In New Database Table

How to do it for CheckBox (save value of Each Checkbox)