WPF ADO.NET没有返回结果

Question

I have a problem with returning results to DataGrid in WPF application using ADO.NET Framework.

First record is text, second too, third is date(if anyone could give me an answer how to make this string would be great).

First, DataGrid XAML code

<DataGrid AutoGenerateColumns="False" EnableRowVirtualization="True" Grid.ColumnSpan="4" Height="200" HorizontalAlignment="Left" ItemsSource="{Binding Source={StaticResource testViewSource1}}" Margin="113,290,0,0" Name="testDataGrid" RowDetailsVisibilityMode="VisibleWhenSelected" VerticalAlignment="Top" Width="319" Loaded="testDataGrid_Loaded">
        <DataGrid.Columns>
            <DataGridTextColumn x:Name="numerZamowieniaColumn" Binding="{Binding Path=numerZamowienia}" Header="numer Zamowienia" Width="SizeToHeader" />
            <DataGridTextColumn x:Name="iloscDostawcowColumn" Binding="{Binding Path=iloscDostawcow}" Header="ilosc Dostawcow" Width="SizeToHeader" />
            <DataGridTemplateColumn x:Name="dataUtworzeniaColumn" Header="data Utworzenia" Width="SizeToHeader">
                <DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <DatePicker SelectedDate="{Binding Path=dataUtworzenia, Mode=TwoWay, ValidatesOnExceptions=true, NotifyOnValidationError=true}" />
                    </DataTemplate>
                </DataGridTemplateColumn.CellTemplate>
            </DataGridTemplateColumn>
        </DataGrid.Columns>
    </DataGrid>

I made event handler when this DataGrid is loaded :

zamowienieEntities zam = new zamowienieEntities();

 private void testDataGrid_Loaded(object sender, RoutedEventArgs e)
    {
        IBindingList users = ((from d in zam.Test
                               select new { d.numerZamowienia, d.iloscDostawcow, d.dataUtworzenia }
      ) as IListSource).GetList() as IBindingList;

        this.testDataGrid.DataContext = users;


    }

This is one of many approaches trying to make this work, and I'm sityting at it for couple hours now, and can't really find any specific answers.

Thanks in advance.

Answer 1

When you do this

ItemsSource="{Binding Source={StaticResource testViewSource1}}"

you bind ItemsSource to some testViewSource1 resource so changing DataContext , as you do in this line

this.testDataGrid.DataContext = users;

won't affect source of DataGrid items. One solution to your problem is to set ItemsSource directly instead of DataContext

this.testDataGrid.ItemsSource = users;

and then you don't need ItemsSource binding, or if you want to set DataContext then you need to change ItemsSource binding to

ItemsSource="{Binding}"

which will bind ItemSource to current DataContext