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;elseCurrentRowIndusrtySublist.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);}}