在Grid中添加动态复选框需要Silverlight中的时间

Question

我在ViewMode中有一个网格（BrkGrid）...我根据一些逻辑添加动态复选框（brkChkBox）。 foreach负责将复选框添加到此网格的特定行和列中。但是将复选框添加到BrkGrid时需要花费时间。当我评论Add语句（BrkGrid.Children.Add（brkChkBox））时，代码执行得更快..任何帮助都将受到高度赞赏......

CheckBox brkChkBox = null;
foreach (var s in this.ViewData.PlnDtShiftBrksDateList)
{
    brkChkBox = new CheckBox
    {
        DataContext = s,
        Tag = s.BreakID,
        Width = 20,
        VerticalAlignment = VerticalAlignment.Top,
    };

    Binding chkBoxBinding = new Binding("IsSelected");
    chkBoxBinding.Source = s;
    chkBoxBinding.Mode = BindingMode.TwoWay;

    brkChkBox.SetBinding(CheckBox.IsCheckedProperty, chkBoxBinding);
    brkChkBox.Click += brkChkBox_Click;

    Grid.SetColumn(brkChkBox, gridColDic.FirstOrDefault(x => x.Key == s.BreakID).Value);
    Grid.SetRow(brkChkBox, gridRowDic.FirstOrDefault(x => x.Key.Date == s.Date.Date).Value);
    BrkGrid.Children.Add(brkChkBox);
}