如何在WPF中从DataGridCell中找到它的所有者DataGrid和DataGridRow？

Question

在DataGrid的Command的事件处理程序中,我在ExecutedRoutedEventArgs中获取DataGridCell.但是,我无法弄清楚如何获取其关联的DataGrid和DataGridRow.非常感谢您的帮助.

Answer 1

你可能想设置某种RelativeSource绑定,可以通过a获得"父网格/行" {RelativeSource FindAncestor, AncestorType={x:Type DataGrid}},但你的问题让我思考......

你可以:

使用反射:

var gridCell = ....;
var parentRow = gridCell
         .GetType()
         .GetProperty("RowOwner", 
               BindingFlags.NonPublic | BindingFlags.Instance)
         .GetValue(null) as DataGridRow;

使用VisualTreeHelper:

var gridCell = ...;
var parent = VisualTreeHelper.GetParent(gridCell);
while(parent != null && parent.GetType() != typeof(DataGridRow))
{
    parent = VisualTreeHelper.GetParent(parent);
}

Answer 2

这是我认为的完整答案......

    private void Copy(object sender, ExecutedRoutedEventArgs e)
    {
        DataGrid grid = GetParent<DataGrid>(e.OriginalSource as DependencyObject);
        DataGridRow row = GetParent<DataGridRow>(e.OriginalSource as DependencyObject);
    }

    private T GetParent<T>(DependencyObject d) where T:class
    {
        while (d != null && !(d is T))
        {
            d = VisualTreeHelper.GetParent(d);
        }
        return d as T;
    }