WPFToolkit DataGrid:Combobox列不会立即更新selectedvaluebinding

Question

我正在使用WPF Toolkit DataGrid和DataGridComboBoxColumn.一切都运行良好,除了在组合框中发生选择更改时,所选的值绑定源不会立即更新.仅当组合框失去焦点时才会发生这种情况.有没有人遇到过这个问题和任何建议解决方案？

这是该列的xaml:

<toolkit:DataGridComboBoxColumn Header="Column" SelectedValueBinding="{Binding Path=Params.ColumnName, UpdateSourceTrigger=PropertyChanged}"
                DisplayMemberPath="cName"
                SelectedValuePath="cName">
                <toolkit:DataGridComboBoxColumn.ElementStyle>
                    <Style TargetType="ComboBox">
                        <Setter Property="ItemsSource" Value="{Binding Info.Columns}" />
                    </Style>
                </toolkit:DataGridComboBoxColumn.ElementStyle>
                <toolkit:DataGridComboBoxColumn.EditingElementStyle>
                    <Style TargetType="ComboBox">
                        <Setter Property="ItemsSource" Value="{Binding Info.Columns}" />
                    </Style>
                </toolkit:DataGridComboBoxColumn.EditingElementStyle>
            </toolkit:DataGridComboBoxColumn>

Answer 1

UpdateSourceTrigger=PropertyChanged 选项在这里至关重要,它离不开它.

Answer 2

问题是单元格保持在编辑模式，直到您离开单元格并提交更改

解决方案：您需要创建自己的列类型来覆盖默认行为

代码：

public class AutoCommitComboBoxColumn : Microsoft.Windows.Controls.DataGridComboBoxColumn
{
    protected override FrameworkElement GenerateEditingElement(Microsoft.Windows.Controls.DataGridCell cell, object dataItem)
    {
        var comboBox = (ComboBox)base.GenerateEditingElement(cell, dataItem);
        comboBox.SelectionChanged += ComboBox_SelectionChanged;
        return comboBox;
    }

    public void ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        CommitCellEdit((FrameworkElement)sender);
    }
}