When row and column errors are defined, the DataGridView control displays a warning icon. For row errors, the icon is displayed to the left of the row. For column errors, the icon is displayed in the

DataGridView 重绘表头,即多表头，二维表头-DataGridView Draw Column,DataGridViewEx

DataGridView指定某一列的单元格合并显示，合并效果与Excel单元格合并效果类似!(DataGridView specifies a column for cell merge display, and the merge effect is similar to Excel cell merge effect!)