ColumnEdit 数据源修改

         //不显示下拉按钮和禁止下拉
         replaceLueStaff.Buttons.Clear();
         replaceLueStaff.ShowDropDown = DevExpress.XtraEditors.Controls.ShowDropDown.Never;
         replaceLueStaff.Click += new EventHandler(replaceLueStaff_Click);



        void replaceLueStaff_Click(object sender, EventArgs e)
        {
            //获取选中的ColumnEdit
            SearchLookUpEdit lue = sender as SearchLookUpEdit;
            //linq实现 not in 筛选
            //gvActor.DataSource为当前gridview,m_dtStaffAll为控件数据源
            var selectedIds = ((DataView)(gvActor.DataSource)).OfType<DataRowView>().Select(x => x["STAFF_ID"].ToString());
            var query = from p in m_dtStaffAll.AsEnumerable()
                        where !(from x in selectedIds select x).Contains(p["STAFF_ID"].ToString())
                        select p;
            lue.Properties.DataSource = query.AsDataView();
            lue.ShowPopup();
        }