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我DataGridComboBoxColumn DataGrid中:DataGridComboBoxColumn結合問題
<DataGridComboBoxColumn Header="{x:Static Properties:Resources.Unit}" Width="Auto"
SelectedValueBinding="{Binding UnitUnitId}"
SelectedValuePath="UnitId"
DisplayMemberPath="Name" >
<DataGridComboBoxColumn.ElementStyle>
<Style TargetType="ComboBox">
<Setter Property="ItemsSource" Value="{Binding Path=DataContext.Units,RelativeSource={RelativeSource AncestorType={x:Type UserControl}}}"/>
</Style>
</DataGridComboBoxColumn.ElementStyle>
<DataGridComboBoxColumn.EditingElementStyle>
<Style TargetType="ComboBox">
<Setter Property="ItemsSource" Value="{Binding Path=DataContext.Units,RelativeSource={RelativeSource AncestorType={x:Type UserControl}}}"/>
</Style>
</DataGridComboBoxColumn.EditingElementStyle>
</DataGridComboBoxColumn>
和ComboBox:
<ComboBox x:Name="unitBox" ItemsSource="{Binding Path=Units}"
SelectedItem="{Binding TaxSubGroup.Unit}"
Grid.Row="2"
Grid.Column="1" Margin="11,11,0,0" HorizontalAlignment="Stretch">
<ComboBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Converter={x:Static c:UnitToStringConverter.Default}}"/>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
單位屬性:
public ObservableCollection<Unit> Units
{
get
{
return _units;
}
set
{
if(_units!=value)
{
_units = value;
RaisePropertyChanged("Units");
}
}
}
當我改變了組合框的值
,DataGridComboBoxColumn的值更新自動,但更改DataGrid的comboboxcolumn的值不更新組合框va略。爲什麼?
修訂
的問題是DataGridComboBoxCulumn的SelectedValueBinding財產。我需要的是添加UpdateSourceTrigger屬性:
SelectedValueBinding="{Binding UnitUnitId,UpdateSourceTrigger=PropertyChanged}"
謝謝你的回答。真的,我使用的是實體框架,默認情況下對象實現INotifyPropertyChanged接口。 – Alex