MultiColumnComboBoxCellType 实现下拉表单
问题描述：能否在点击单元格时，根据当前单元格信息，弹出其相对应的数据库子表单。问题解答：MultiColumnComboBoxCellType 单元格类型可以绑定DataTable，并且以下拉框方式显示。
关键代码：
//设置 MultiColumnComboBoxCellType
FarPoint.Win.Spread.CellType.MultiColumnComboBoxCellType mcb = new FarPoint.Win.Spread.CellType.MultiColumnComboBoxCellType();
mcb.DataSourceList = dt;
mcb.DataColumn = 2;
mcb.ColumnEdit = 2;
mcb.ButtonAlign = FarPoint.Win.ButtonAlign.Left;
mcb.ListAlignment = FarPoint.Win.ListAlignment.Right;
mcb.ListWidth = 500;
mcb.ListOffset = 5;
mcb.MaxDrop = 5;
fpSpread1.ActiveSheet.Cells.CellType = mcb;
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效果截图：
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