WPF DataGrid CheckBoxColumn绑定模式= TwoWay错误

Question

Here is my code

<DataGrid.Columns>
    <DataGridTemplateColumn Header="" Width="30" IsReadOnly="False">
        <DataGridTemplateColumn.CellTemplate>
            <DataTemplate>
                <CheckBox  IsChecked="{Binding Path = chk, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
            </DataTemplate>
        </DataGridTemplateColumn.CellTemplate>
        <DataGridTemplateColumn.CellStyle>
            <Style TargetType="{x:Type DataGridCell}">
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="{x:Type DataGridCell}">
                            <Grid Background="{TemplateBinding Background}">
                                <ContentPresenter VerticalAlignment="Center"
                          HorizontalAlignment="Center" />
                            </Grid>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </DataGridTemplateColumn.CellStyle>
    </DataGridTemplateColumn>

I have an exception Binding type TwoWay OneWayToSource or can not work with read-only property "chk" type "System.Data.DataRowView".

When I do mode = OneWay, all good.But i need to change the target object and source object

Answer 1

Your property binded to ComboBox "chk" does not have "set" implemented and so as it has only get it is considered as readonly . Implement set and call INotifyPropertyChanged interface to notify change in the property.