如何判断Excel单元格是否为合并单元格

超简单， 通过Range的MergeCells 即可判断。
示例代码如下：

Excel.Application oXL;
            Excel._Workbook oWB;
            Excel._Worksheet oSheet;
            Excel.Range oRng;
             object  missing  =  System.Type.Missing;

             // 创建Excel实例
            oXL  =   new  Excel.Application();

             // 打开已有的工作簿
            oWB  =  oXL.Workbooks.Open( @" E:\BookTest.xls " ,missing,missing,missing,missing,missing,missing,
                    missing,missing,missing,missing,missing,missing,missing,missing);
                oSheet  =  (Excel.Worksheet)oWB.Sheets.get_Item( 1 );
            
             //  获取 A1 单元格
            oRng  =  (Excel.Range)oSheet.Cells[ 1 , " A " ];
             bool  isMerge  =  ( bool )oRng.MergeCells;
            MessageBox.Show(isMerge.ToString());