Mode=TwoWay, UpdateSourceTrigger=PropertyChanged or LostFocus?

Vote count:

0

I bind a table of a Database into a DataGrid using an Observable Collection:

class ViewModel:INotifyPropertyChanged
{
    private BDDInterneEntities _BDDInterneEntities;

    public ViewModel()
    {
        _BDDInterneEntities = new BDDInterneEntities();
        ResultatCollection = new ObservableCollection<Resultat>(_BDDInterneEntities.Resultat);

    }         
    public ObservableCollection<Resultat> ResultatCollection { get; set; }

    public event PropertyChangedEventHandler PropertyChanged;
}

This is my DataGrid:

<DataGrid x:Name="DonneesBrutes" ItemsSource="{Binding Path=.ResultatCollection, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Margin="10,65,0,0" AutoGenerateColumns="False" EnableRowVirtualization="True" RowDetailsVisibilityMode="VisibleWhenSelected">
            <DataGrid.Columns>
                <DataGridTextColumn x:Name="PMRQ" Width="*" Binding="{Binding Path=.TOTMPMRQ, Mode=TwoWay, UpdateSourceTrigger=LostFocus}" Header="PMRQ"></DataGridTextColumn>
                <DataGridTextColumn x:Name="LibellePMRQ" Width="*" Binding="{Binding Path=.LibelléTOTApres, Mode=TwoWay, UpdateSourceTrigger=LostFocus}" Header="Libellé PMRQ"></DataGridTextColumn>
                <DataGridTextColumn x:Name="Ligne" Width="*" Header="Ligne"></DataGridTextColumn>
                <DataGridTextColumn x:Name="OTM" Width="*" Header="OTM"></DataGridTextColumn>
                <DataGridTextColumn x:Name="TOTM" Width="*" Header="TOTM"></DataGridTextColumn>
                <DataGridTextColumn x:Name="LibelleTOTM" Width="*" Header="Libellé OTM"></DataGridTextColumn>
                <DataGridTextColumn x:Name="GA" Width="*" Header="GA"></DataGridTextColumn>
                <DataGridTextColumn x:Name="Discipline" Width="*" Header="Discipline"></DataGridTextColumn>
                <DataGridTextColumn x:Name="DisciplineSubstituee" Width="120" Header="Discipline Substituée"></DataGridTextColumn>
                <DataGridTextColumn x:Name="colonnesupp" Width="*" Header="colonne supp"></DataGridTextColumn>
            </DataGrid.Columns>
        </DataGrid>

The binding in one Way works well, I can see datas from my table into my DataGrid.

I have searched many informations about being able to send datas from my DataGrid to my Database and I found the TwoWay mode and the UpdateSourceTrigger property: http://ift.tt/1rlAZh1

I think it's a great solution to perform this binding, but I'm not sure about what to do with. Is UpdateSourceTrigger best property for me is LostFocus, PropertyChanged? Is it enough to do this? My code only works on OneWay, the other way doesn't works.

asked 2 mins ago

Kraenys

34

Mode=TwoWay, UpdateSourceTrigger=PropertyChanged or LostFocus?