CODEWITHSUNDEEP
wpfdatagridobservablecollection
manton
manton

Reputation: 561

ObservableCollection doesn't reflect changes in the DataGrid

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!

Upvotes: 1

Views: 2413

Answers (2)

Vinit Sankhe
Vinit Sankhe

Reputation: 19885

What kind of changes are you doing to the GUI? Are you updating the Text of the TextBox and checking the CheckBox?

If so the same example works in my case. I receive the updated text and checked boolean back in my model when I focus off the textbox or checkbox.

Upvotes: 0

Pongsathon.keng
Pongsathon.keng

Reputation: 1435

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}"/>

Upvotes: 1

Related Questions