wpf 数据网格：DataGridCheckBoxColumn 事件
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wpf datagrid: DataGridCheckBoxColumn events
提问by FrancescoDS
In my WPF project I have build the following datagrid with checkbox column:
在我的 WPF 项目中，我使用复选框列构建了以下数据网格：
XAML
XAML
<DataGrid AutoGenerateColumns="False" TargetUpdated="IsIntermediatePointFixedByBracketDataGrid_TargetUpdated">
<DataGrid.Columns>
<DataGridCheckBoxColumn Binding="{Binding isFixedByBracket, NotifyOnTargetUpdated=True }" />
</DataGrid.Columns>
</DataGrid>
C#
C＃
private void IsIntermediatePointFixedByBracketDataGrid_TargetUpdated(object sender, DataTransferEventArgs e)
{
DataGrid dg = (DataGrid)sender;
if (dg.SelectedIndex != -1
&& ((IsFixedByBracketElement)dg.SelectedItem).isFixedByBracket != this.currentIntermediatePosition.isFixedByBracket[dg.SelectedIndex])
{
this.currentIntermediatePosition.isFixedByBracket[dg.SelectedIndex] =
((IsFixedByBracketElement)dg.SelectedItem).isFixedByBracket;
}
}
When I check/uncheck a checkbox, the TargetUpdated event is thrown, but the value changes only if I select and deselect the cell that contains the checkbox. Why does this happen?How can I change this behaviour?
当我选中/取消选中复选框时，会引发 TargetUpdated 事件，但仅当我选择和取消选择包含该复选框的单元格时，值才会更改。为什么会发生这种情况？我怎样才能改变这种行为？
回答by eran otzap
The Reason for this is becuase the default behavior of binding inside CellTemplates are UpdateSourceTrigger=LostFocus
这样做的原因是因为 CellTemplates 内绑定的默认行为是 UpdateSourceTrigger=LostFocus
change to :
改成 ：
<DataGridCheckBoxColumn Binding="{Binding isFixedByBracket, NotifyOnTargetUpdated=True , UpdateSourceTrigger=PropertyChanged }" />
