如何停止 DataGrid 在属性更改时折叠行详细信息？

Question

给定一个带有切换行详细信息按钮的 DataGrid。为什么每次更改属性时都会折叠详细信息？

每当列使用时，它都会折叠详细信息：

UpdateSourceTrigger=LostFocus

当属性在详细信息视图中更新时，它也会折叠它。

有没有办法让它保持打开状态？该行仍处于选中状态。

XAML：

RowDetailsVisibilityMode="Collapsed"

                <DataGridTemplateColumn>
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <Button x:Name="buttonDetails" Content="Hello" ButtonBase.Click="Details_Click"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

C#：

    // Load stuff from db
    _context.JobCollection.Load();

    // Set source with db stuff
    jobViewSource.Source = _context.JobCollection.Local;



    private void Details_Click(object sender, RoutedEventArgs e)
    {
        try
        {
            // the original source is what was clicked.  For example 
            // a button.
            DependencyObject dep = (DependencyObject)e.OriginalSource;

            // iteratively traverse the visual tree upwards looking for
            // the clicked row.
            while ((dep != null) && !(dep is DataGridRow))
            {
                dep = VisualTreeHelper.GetParent(dep);
            }

            // if we found the clicked row
            if (dep != null && dep is DataGridRow)
            {
                // get the row
                DataGridRow row = (DataGridRow)dep;

                // change the details visibility
                if (row.DetailsVisibility == Visibility.Collapsed)
                {
                    row.DetailsVisibility = Visibility.Visible;
                }
                else
                {
                    row.DetailsVisibility = Visibility.Collapsed;
                }
            }
        }
        catch (System.Exception)
        {
        }
    }

Answer 1

一些建议的更改：

1. 将RowDetailsVisibilityMode="Collapsed" 应用到您的DataGrid。

2. 你的按钮点击应该是这样的：

   private void Details_Click(object sender, RoutedEventArgs e)
   {
      DataGridRow row = (DataGridRow)Dgrd1.ItemContainerGenerator.ContainerFromItem(Dgrd1.SelectedItem);
   
      if (row.DetailsVisibility == System.Windows.Visibility.Visible)
          row.DetailsVisibility = System.Windows.Visibility.Collapsed;
      else
          row.DetailsVisibility = System.Windows.Visibility.Visible;
   }