【原创】有关Silverlight中“DataGrid中级联动态绑定父/子ComboBox ”的示例。

尝试了很多种方案，由于Datagrid动态生成的每行父子comboBox的Name的不确定性，给父ComboBox绑定事件中获取 子ComboBox很难根据Name获取到。

花了不少时间和公司同事商讨，最终方案如下：

注:父子combobox分别代表： 主行业/子行业

  private void CurrentRowIndusrtylist_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            ComboBox combobox = sender as ComboBox;
            //获取另一个conbox控件
            CurrentRowIndusrtylist = (sender as ComboBox);
            if (CurrentRowIndusrtylist != null)
            {
                DataGridCell dg = (DataGridCell)(CurrentRowIndusrtylist.Parent);//关键用法
                if (DataGridRow.GetRowContainingElement(dg) != null)
                {
                    CurrentRowIndusrtySublist = this.dataGrid9.Columns[3].GetCellContent(DataGridRow.GetRowContainingElement(dg)) as ComboBox;//关键用法
                    if (CurrentRowIndusrtySublist != null)
                        BindSubIndusrtyCodes();//动态去绑定子combobox
                }
            }
        }

        private void BindSubIndusrtyCodes()
        {
            if (CurrentRowIndusrtylist.SelectedItem != null)
            {
                var unitIndusrtyItem = CurrentRowIndusrtylist.SelectedItem as System_IndustryCodes;
                _db.Load(_db.GetIndustryCodesQuery(), op =>
                {
                    CurrentRowIndusrtySublist.Items.Clear();
                    CurrentRowIndusrtySublist.Items.Add(new System_IndustryCodes { ID = -1, IndustryCodes = "--请选择子行业--" });
                    IEnumerable<System_IndustryCodes> tempsubList = op.Entities.Where(q => q.ParentCodeID == unitIndusrtyItem.ID);
                    foreach (var temp in tempsubList)
                    {
                        if (temp == null)
                            return;
                        CurrentRowIndusrtySublist.Items.Add(new System_IndustryCodes { ID = temp.ID, IndustryCodes = temp.IndustryCodes });
                    }
                    CurrentRowIndusrtySublist.DisplayMemberPath = "IndustryCodes";
                    CurrentRowIndusrtySublist.SelectedValuePath = "ID";
                    CurrentRowIndusrtySublist.UpdateLayout();
                    if (CurrentRowIndusrtySublist.Items.Count == 1)
                        CurrentRowIndusrtySublist.SelectedIndex = 0;
                    else
                        CurrentRowIndusrtySublist.SelectedIndex = 1;
                    //if (_OldSubindustryId != 0)
                        //CurrentRowIndusrtySublist.SelectedItem = (from q in CurrentRowIndusrtySublist.Items where (q as System_IndustryCodes).ID == _OldSubindustryId select q).FirstOrDefault();//默认选择项-子行业
                }, null);
            }
        }

最终效果：