WPF MVVM ComboBox(in DataGrid)触发事件SelectionChanged, 通知到ViewModel.
Posted akiva
tags:
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1.View
<DataGrid>
<DataGrid.Resources>
<DataTemplate x:Key="ComputeRuleColumnTemplate">
<ComboBox x:Name=‘ComputeRuleComboBox‘>
<i:Interaction.Triggers>
<i:EventTrigger EventName="SelectionChanged">
<i:InvokeCommandAction Command="{Binding DataContext.ComboBoxComputeRuleSelectionChangedCommand,RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=UserControl}}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</ComboBox>
</DataTemplate>
</DataGrid.Resources>
</DataGrid>
2.View.cs
private void DataGrid_AutoGeneratedColumns(object sender, EventArgs e)
{
foreach (var name in names)
{
switch (dataGridHeader)
{
case "COMPUTERULE":
dataGridTemplateColumn = new DataGridTemplateColumn { Header = name };
dt = dataGrid.Resources["ComputeRuleColumnTemplate"] as DataTemplate;
dataGridTemplateColumn.CellTemplate = dt;
dg.Columns.Add(dataGridTemplateColumn);
break;
}
}
}
3.ViewModel
public ICommand ComboBoxComputeRuleSelectionChangedCommand { get; private set; }
public void InitialCommand()
{
ComboBoxComputeRuleSelectionChangedCommand = new DelegateCommand(OnComboBoxComputeRuleSelectionChangedCommand);
}
private void OnComboBoxComputeRuleSelectionChangedCommand()
{
UpdateResultObrclnByComboBoxComputeRuleSelectionChanged();
}
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