修正AduDataGrid中使用AduCheckBox时，选中行后，复选框显示不正常的BUG

[superwoo]

using AduSkin.Controls.Helper;
using AduSkin.Utility.Element;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace AduSkin.Controls.Metro
{
public class AduDataGrid : DataGrid
{
///

/// 所有 AduCheckBox 对象名称。
///

private IEnumerable _chkns = null;

  public AduDataGrid()
  {
     Utility.Refresh(this);

     _chkns = FindVisualChildren<AduCheckBox>(this).
        Select(v => v.Name).Distinct();
  }

  static AduDataGrid()
  {
     ElementBase.DefaultStyle<AduDataGrid>(DefaultStyleKeyProperty);
  }

  protected override void OnSelectionChanged(SelectionChangedEventArgs e)
  {
     base.OnSelectionChanged(e);

     if (_chkns.Count() > 0)
     {
        var setters = this.RowStyle?.Setters;
        var bg = Color.FromRgb(255, 255, 255);
        var bb = Color.FromRgb(255, 255, 255);

        foreach (Setter setter in setters)
        {
           if (setter.Property.Name == "Background")
              bg = setter.Value.ToColor();
           else if (setter.Property.Name == "BorderBrush")
              bb = setter.Value.ToColor();
        }

        var scs = this.SelectedCells;

        for (int i = 0; i < scs.Count; i++)
        {
           if (scs[i].Column is DataGridTemplateColumn tc)
           {
              for (int j = 0; j < this.Items.Count; j++)
              {
                 var fe = tc.GetCellContent(this.Items[j]);

                 if (fe != null)
                 {
                    foreach (var item in _chkns)
                    {
                       if (tc.CellTemplate.FindName(item, fe) is AduCheckBox chk)
                       {
                          chk.Foreground = j == this.SelectedIndex ?
                             new SolidColorBrush(bg) : new SolidColorBrush(bb);
                       }
                    }
                 }
              }
           }
        }
     }
  }

  private static IEnumerable<T> FindVisualChildren<T>(DependencyObject dep) where T : DependencyObject
  {
     if (dep != null)
     {
        for (int i = 0; i < VisualTreeHelper.GetChildrenCount(dep); i++)
        {
           DependencyObject child = VisualTreeHelper.GetChild(dep, i);
           if (child != null && child is T)
           {
              yield return (T)child;
           }

           foreach (T childOfChild in FindVisualChildren<T>(child))
           {
              yield return childOfChild;
           }
        }
     }
  }

}
}
// ExtensionMethod
internal static Color ToColor(this object value)
{
try
{
return (Color)ColorConverter.ConvertFromString(value.ToString());
}
catch (System.Exception)
{
return Color.FromRgb(255, 255, 255);
}
}