Question

XAML

<DataGrid ItemsSource="{Binding Products}" CanUserAddRows="False" AutoGenerateColumns="False" SelectedItem="{Binding SelectedProduct}">
<i:Interaction.Triggers>
    <i:EventTrigger EventName="CellEditEnding">
        <cmd:EventToCommand Command="{Binding ProdcutCellEditCmd,UpdateSourceTrigger=PropertyChanged}" PassEventArgsToCommand="True"></cmd:EventToCommand>
    </i:EventTrigger>
</i:Interaction.Triggers>
<DataGrid.Columns>
    <DataGridTextColumn Binding="{Binding id}" Header="ID" IsReadOnly="True"></DataGridTextColumn>
    <DataGridTextColumn Binding="{Binding ParentLCSKU}" Header="LCSKU(Parent)" IsReadOnly="True"></DataGridTextColumn>
    <DataGridTextColumn Binding="{Binding ChildLCSKU}" Header="LCSKU(Child)" IsReadOnly="True"></DataGridTextColumn>
    <DataGridComboBoxColumn ItemsSource="{Binding Source={StaticResource ProductColors}}" SelectedValueBinding="{Binding Color}" Header="颜色" IsReadOnly="True"></DataGridComboBoxColumn>
    <DataGridComboBoxColumn ItemsSource="{Binding Source={StaticResource ProductSizes}}" SelectedValueBinding="{Binding Size}" Header="尺寸" IsReadOnly="True"></DataGridComboBoxColumn>
    <DataGridComboBoxColumn ItemsSource="{Binding Source={StaticResource ProductCategories}}" SelectedValueBinding="{Binding Category}" Header="类别" IsReadOnly="True"></DataGridComboBoxColumn>
    <DataGridTextColumn Binding="{Binding Cost}" Header="成本"></DataGridTextColumn>
    <DataGridCheckBoxColumn Binding="{Binding IsOEM,UpdateSourceTrigger=PropertyChanged}" Header="OEM"></DataGridCheckBoxColumn>
</DataGrid.Columns>

视图模型

public ProductVM()
{
    ProdcutCellEditCmd = new RelayCommand<DataGridCellEditEndingEventArgs>(prodcutDataGridCellEditEnding);

}
public RelayCommand<DataGridCellEditEndingEventArgs> ProdcutCellEditCmd { get; set; }
private void prodcutDataGridCellEditEnding(DataGridCellEditEndingEventArgs e)
{
    if (e.EditAction == DataGridEditAction.Commit)
    {
        var prodcut = e.Row.DataContext as BaseProduct;
        SelectedProduct = prodcut;
        productSave();
    }
}

我想在选中或取消选中复选框后触发CellEditEnding事件，但此事件仅在单元格失去焦点时触发。

这有什么不对吗？

抱歉我的英语不好。

Answer 1

这是正常行为导致事件名称为CellEditEnding。这意味着在完成单元格编辑后会触发事件。

我建议你绑定Command中的CheckBox属性。如果DataGrid置于Window，您应该写：

<CheckBox Header="OEM" IsChecked="{Binding IsOEM,UpdateSourceTrigger=PropertyChanged}}"
                 Command="{Binding DataContext.ProdcutCellEditCmd, RelativeSource=
                {RelativeSource AncestorType=Window, Mode=FindAncestor}}"}" />

如果DataGrid放在UserControl，您应该写：

<CheckBox Header="OEM" IsChecked="{Binding IsOEM,UpdateSourceTrigger=PropertyChanged}}"
                 Command="{Binding DataContext.ProdcutCellEditCmd, RelativeSource=
                {RelativeSource AncestorType=UserControl, Mode=FindAncestor}}"}" />

Answer 2

在这种情况下你可以做一件事，你必须更新像

这样的代码

首先给出数据网格的名称，如

document.onkeydown = function(e) {
        if (e.ctrlKey || e.shiftKey) {
            return false;
        } else {
            return true;
        }
};

现在您必须绑定Checkbox检查事件并传递datagrid行，以便您可以在ViewModel中访问该行的所有值

<DataGrid ItemsSource="{Binding Products}" Name="dg" CanUserAddRows="False" AutoGenerateColumns="False" SelectedItem="{Binding SelectedProduct}">

您的<DataGridCheckBoxColumn Binding="{Binding IsOEM,UpdateSourceTrigger=PropertyChanged}" Header="OEM"> <i:Interaction.Triggers> <i:EventTrigger EventName="Checked"> <i:InvokeCommandAction Command="{Binding CheckBoxChecked,Mode=TwoWay,RelativeSource={RelativeSource AncestorType=DataGrid}}" CommandParameter="{Binding ElementName=dg,Path=SelectedItem}" /> </i:EventTrigger> </i:Interaction.Triggers> </DataGridCheckBoxColumn>应该是这样的我假设你已经在数据网格中绑定了List，所以基于它你的relay命令应该是

RelayCommand

Mvvmlight UpdateSourceTrigger无法正常工作

2 个答案: