您好我有一个wpf项目,它将datagrid绑定到模块,如下所示:
<DataGrid.Columns>
<DataGridTextColumn Header="Name" Binding="{Binding Name}" IsReadOnly="True"/>
<DataGridTemplateColumn Header="Values">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ComboBox ItemsSource="{Binding Values}" SelectedItem="{Binding Value, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
这很好用。现在我想添加一些功能,包括设置组合框SelectionChanged
的事件。所以我改变了xaml
这样的文件:
<DataGrid.Columns>
<DataGridTextColumn Header="Name" Binding="{Binding Name}" IsReadOnly="True"/>
<DataGridTemplateColumn Header="Values">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ComboBox ItemsSource="{Binding Values}" SelectedItem="{Binding Value, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}">
/!-- Add an EventSetter here. -->
<Style TargetType="{x:Type ComboBox}">
<EventSetter Event="SelectionChanged" Handler="ValueChanged" />
</Style>
</ComboBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
在后端添加一个函数,如下所示:
private void ValueChanged(object sender, SelectionChangedEventArgs e)
{
var comboBox = sender as ComboBox;
if (comboBox.SelectedItem != null)
{
//do something here.
}
}
但是当我更改组合框单元格时,这会使项目按error: "The Application is in break mode."
细分。那可能是什么问题呢?提前谢谢!
答案 0 :(得分:0)
combobox
内设置事件即可解决问题。
<DataGrid.Columns>
<DataGridTextColumn Header="Name" Binding="{Binding Name}" IsReadOnly="True"/>
<DataGridTemplateColumn Header="Values">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ComboBox ItemsSource="{Binding Values}" SelectedItem="{Binding Value, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
SelectionChanged="ValueChanged" />
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
答案 1 :(得分:0)
您需要将Style
的{{1}}属性设置为ComboBox
:
Style
或者您可以直接在<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ComboBox ItemsSource="{Binding Values}" SelectedItem="{Binding Value, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}">
<ComboBox.Style>
<Style TargetType="{x:Type ComboBox}">
<EventSetter Event="SelectionChanged" Handler="ValueChanged" />
</Style>
</ComboBox.Style>
</ComboBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
元素上挂接事件处理程序并删除ComboBox
:
Style