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我正在使用 MVVM。我使用一些代码将数据网格绑定到集合:

<commonMVVMControls:GridControl DataContext="{Binding Path=ClientsListGrid,
                                                          Mode=TwoWay}"

它是 DataGridControl 类:

public class GridControl : DataGrid
{
    public GridControl()
    {
        this.DataContextChanged += new System.Windows.DependencyPropertyChangedEventHandler(GridControl_DataContextChanged);
    }

    void GridControl_DataContextChanged(object sender, System.Windows.DependencyPropertyChangedEventArgs e)
    {
        var bindingItemsSource = new Binding("ItemsSource");
        bindingItemsSource.Source = this.DataContext;
        this.SetBinding(DataGrid.ItemsSourceProperty, bindingItemsSource);

        this.RowStyle = new Style(typeof(DataGridRow));
        this.RowStyle.Setters.Add(new Setter(DataGridRow.IsSelectedProperty, new Binding("IsSelected")));
    }

现在是 ViewModel 中的一段代码:

var selectedClient = this.ClientsListGrid.ItemsSource.Where(x => x.IsSelected);
        if (!selectedClient.Any()) 
        {
            MessageBox.Show(Resource.Resource.UpdateUserError, Resource.Resource.Warning, MessageBoxButton.OK, MessageBoxImage.Stop,
            MessageBoxResult.OK);
            return;
        }

        var viewModel = new AddOrUpdateClientViewModel(_serviceContext, selectedClient.First()); 

它运作良好。但是,如果我向下或向上滚动数据网格,它就会停止工作,并且 IsSelected 总是等于 false。

4

1 回答 1

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尝试看看如果禁用虚拟化会发生什么。这可能与此有关。

于 2012-09-15T17:18:49.717 回答