Question

I have implemented a DataGrid that way:

    <DataGrid 
    x:Name="MyDataGridFilter"
    ItemsSource="{Binding}"
    IsSynchronizedWithCurrentItem="True"
    AutoGenerateColumns="False">
    <DataGrid.Columns>
        <DataGridTemplateColumn 
                x:Name="FilterTextCol01">
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*" />
                            <ColumnDefinition Width="Auto" />
                        </Grid.ColumnDefinitions>
                        <TextBox 
                            Grid.Column="0"
                            IsHitTestVisible="True"
                            Text="{Binding Path=FilterTextCol01}" />
                        <CheckBox 
                            Grid.Column="1"
                            x:Name="FilterAktivTextCol01"
                            IsHitTestVisible="True"
                            IsChecked="{Binding Path=FilterAktivTextCol01}"/>
                    </Grid>
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
        </DataGridTemplateColumn>

The binding in the Code goes this way:

FilterItemsList = new ObservableCollection<DataGridFilterEntity>();
MyDataGridFilter.DataContext = FilterItemsList;

(it is shorted)
FilterItemsList is implemented as an INotifyPropertyChanged clas:

public class DataGridFilterEntity : INotifyPropertyChanged

With the member FilterTextCol01 (of course):

public string FilterTextCol01
    {
        get { return _FilterTextCol01; }
        set
        {
            _FilterTextCol01 = value;
            Changed("FilterTextCol01");
        }
    }

Everything works fine. When I change the FilterItemsList the DataGrid refelcts these changes.
But when I make some changes in the UI (in the DataGrid) it isn’t reflected by the ObservableCollection (FilterItemsList).

I searched and tried some hours but did not find any solution.
Does anyone know how to solve this?
Thank you!

Answer 1

You need TwoWay binding.

For example,

 <TextBox 
                        Grid.Column="0"
                        IsHitTestVisible="True"
                        Text="{Binding Path=FilterTextCol01, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
   <CheckBox 
                        Grid.Column="1"
                        x:Name="FilterAktivTextCol01"
                        IsHitTestVisible="True"
                        IsChecked="{Binding Path=FilterAktivTextCol01, Mode=TwoWay}"/>