winform，用DevExpress的gridview绑定数据
编辑方式采用EditFormInplace

当editformshowing后
给第一个下拉框填充数据
并添加事件

RepositoryItemComboBox riCombo = new RepositoryItemComboBox();

riCombo.Items.AddRange(new string[] { "违纪", "职务违法犯罪", "其他违法犯罪" });

gridControl1.RepositoryItems.Add(riCombo);

colType.ColumnEdit = riCombo;

 colType.ColumnEdit.EditValueChanging += new DevExpress.XtraEditors.Controls.ChangingEventHandler(level1);

当事件执行的时候，我想让第二个下拉框填充动态数据

 private void level1(object sender, ChangingEventArgs e)

        {





            switch (e.NewValue.ToString())

            {

                case "违纪":

                    RepositoryItemComboBox riCombo1 = new RepositoryItemComboBox();

                    riCombo1.Items.AddRange(new string[] { "111111", "11111", "11111"});

                    gridControl1.RepositoryItems.Add(riCombo1);

                    colClass1Type.ColumnEdit = riCombo1;

                    

                    break;

                case "职务违法犯罪":

                    RepositoryItemComboBox riCombo2 = new RepositoryItemComboBox();

                    riCombo2.Items.AddRange(new string[] { "2222", "22222", "22222", "22222, "22222", "22222" });

                    gridControl1.RepositoryItems.Add(riCombo2);

                    colClass1Type.ColumnEdit = riCombo2;



                    break;

                case "其他违法犯罪":

                    RepositoryItemComboBox riCombo3 = new RepositoryItemComboBox();

                    riCombo3.Items.AddRange(new string[] { "3333", "33333", "33333", "33333", "33333" });

                    gridControl1.RepositoryItems.Add(riCombo3);

                    colClass1Type.ColumnEdit = riCombo3;



                    break;

                default:

                    break;

            }

        }

但是editform界面没有更新~~~
请问大佬是哪里还需要设置吗？？？