我需要获取WPF DataGridCell的位置,在DataGrid单元格更改事件中获得,但只能获取垂直位置(Y轴)。水平位置保持不变,即使指向不同的列。
以下是几乎可用的代码。通过单击不同的单元格进行测试。
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
List<Person> Persons = new List<Person>();
public MainWindow()
{
InitializeComponent();
Persons.Add(new Person { Id = 1, Name = "John", City = "London" });
Persons.Add(new Person { Id = 2, Name = "Charles", City = "Rome" });
Persons.Add(new Person { Id = 3, Name = "Paul", City = "Chicago" });
this.EditingDataGrid.ItemsSource = Persons;
this.EditingDataGrid.CurrentCellChanged += new EventHandler<EventArgs>(EditingDataGrid_CurrentCellChanged);
}
void EditingDataGrid_CurrentCellChanged(object sender, EventArgs e)
{
DataGridCell Cell = GetCurrentCell(this.EditingDataGrid);
var Position = Cell.PointToScreen(new Point(0, 0));
// WHY X NEVER CHANGES??!!
MessageBox.Show("X=" + Position.X.ToString() + ", Y=" + Position.Y.ToString(), "Position");
}
/// <summary>
/// Returns, for this supplied Source Data-Grid, the current Data-Grid-Cell.
/// May return null if no associated Cell is found.
/// </summary>
public static DataGridCell GetCurrentCell(DataGrid SourceDataGrid)
{
if (SourceDataGrid.CurrentCell == null)
return null;
var RowContainer = SourceDataGrid.ItemContainerGenerator.ContainerFromItem(SourceDataGrid.CurrentCell.Item);
if (RowContainer == null)
return null;
var RowPresenter = GetVisualChild<System.Windows.Controls.Primitives.DataGridCellsPresenter>(RowContainer);
if (RowPresenter == null)
return null;
var Container = RowPresenter.ItemContainerGenerator.ContainerFromItem(SourceDataGrid.CurrentCell.Item);
var Cell = Container as DataGridCell;
// Try to get the cell if null, because maybe the cell is virtualized
if (Cell == null)
{
SourceDataGrid.ScrollIntoView(RowContainer, SourceDataGrid.CurrentCell.Column);
Container = RowPresenter.ItemContainerGenerator.ContainerFromItem(SourceDataGrid.CurrentCell.Item);
Cell = Container as DataGridCell;
}
return Cell;
}
/// <summary>
/// Returns the nearest child having the specified TRet type for the supplied Target.
/// </summary>
public static TRet GetVisualChild<TRet>(DependencyObject Target) where TRet : DependencyObject
{
if (Target == null)
return null;
for (int ChildIndex = 0; ChildIndex < VisualTreeHelper.GetChildrenCount(Target); ChildIndex++)
{
var Child = VisualTreeHelper.GetChild(Target, ChildIndex);
if (Child != null && Child is TRet)
return (TRet)Child;
else
{
TRet childOfChild = GetVisualChild<TRet>(Child);
if (childOfChild != null)
return childOfChild;
}
}
return null;
}
}
public class Person
{
public int Id { get; set; }
public string Name { get; set; }
public string City { get; set; }
}
数据网格只需使用以下代码进行定义:
<DataGrid x:Name="EditingDataGrid"/
>。也许存在其他方法来获取数据网格单元格的位置?