C#操作EXCEL常见操作集合（行高,列宽,合并单元格,单元格边框线）

 private _Workbook _workBook = null;
 private Worksheet _workSheet = null;
 private Excel.Application _excelApplicatin = null;

 _excelApplicatin = new Excel.Application();
 _excelApplicatin.Visible = true;
 _excelApplicatin.DisplayAlerts = true;

 _workBook = _excelApplicatin.Workbooks.Add(XlSheetType.xlWorksheet);
 _workSheet = (Worksheet)_workBook.ActiveSheet;
 _workSheet.Name = "workSheetName";

 //打开已存在的Excel
             string strExcelPathName = AppDomain.CurrentDomain.BaseDirectory + "excelSheetName.xls";
             Excel.Workbook workBook = application.Workbooks.Open(strExcelPathName, Type.Missing, Type.Missing,
               Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
               Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
            //读取已打开的Excel
             Excel.Worksheet workSheet1 = (Excel.Worksheet)workBook.Sheets["SheetName1"];
             Excel.Worksheet workSheet2 = (Excel.Worksheet)workBook.Sheets["SheetName2"];        

             //添加一个workSheet
             Worksheet workSheet = (Worksheet)workBook.Worksheets.Add(System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing);

 //RowHeight   "1:1"表示第一行, "1:2"表示,第一行和第二行
 ((Excel.Range)_workSheet.Rows["1:1", System.Type.Missing]).RowHeight = ;

 //ColumnWidth "A:B"表示第一列和第二列, "A:A"表示第一列
 ((Excel.Range)_workSheet.Columns["A:B", System.Type.Missing]).ColumnWidth = ;

 // EXCEL操作(需要冻结的字段 按住ALT+W 再按F)
             Excel.Range excelRange = _workSheet .get_Range(_workSheet .Cells[, ], _workSheet .Cells[, ]);
             excelRange.Select();
             excelApplication.ActiveWindow.FreezePanes = true;

 //Borders.LineStyle 单元格边框线
 Excel.Range excelRange = _workSheet.get_Range(_workSheet.Cells[, ], _workSheet.Cells[, ]);
 //单元格边框线类型(线型,虚线型)
 excelRange.Borders.LineStyle = ;
 excelRange.Borders.get_Item(XlBordersIndex.xlEdgeTop).LineStyle = Excel.XlLineStyle.xlContinuous;
 //指定单元格下边框线粗细,和色彩
 excelRange.Borders.get_Item(XlBordersIndex.xlEdgeBottom).Weight = Excel.XlBorderWeight.xlMedium;

 excelRange.Borders.get_Item(XlBordersIndex.xlEdgeBottom).ColorIndex =;

 //设置字体大小
 excelRange.Font.Size = ;
 //设置字体是否有下划线
 excelRange.Font.Underline = true;  

 //设置字体在单元格内的对其方式
 excelRange.HorizontalAlignment = XlHAlign.xlHAlignCenter;
 //设置单元格的宽度
 excelRange.ColumnWidth = ;
 //设置单元格的背景色
 excelRange.Cells.Interior.Color = System.Drawing.Color.FromArgb(, , ).ToArgb();
 // 给单元格加边框
 excelRange.BorderAround(XlLineStyle.xlContinuous, XlBorderWeight.xlThick,
                                           XlColorIndex.xlColorIndexAutomatic, System.Drawing.Color.Black.ToArgb());
 //自动调整列宽
 excelRange.EntireColumn.AutoFit();
 // 文本水平居中方式
 excelRange.HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
 //文本自动换行
 excelRange.WrapText = true;
 //填充颜色为淡紫色
 excelRange.Interior.ColorIndex = ;

 //合并单元格
 excelRange.Merge(excelRange.MergeCells);
 _workSheet.get_Range("A15", "B15").Merge(_workSheet.get_Range("A15", "B15").MergeCells);

附颜色枚举表：

 /// <summary>
 /// 常用颜色定义,对就Excel中颜色名
 /// </summary>
 public enum ColorIndex
 {
    无色 = -,   自动 = -,   黑色 = ,   褐色 = ,   橄榄 = ,   深绿 = ,   深青 = ,
    深蓝 = ,   靛蓝 = ,   灰色80 = ,   深红 = ,   橙色 = ,   深黄 = ,   绿色 = ,
    青色 = ,   蓝色 = ,   蓝灰 = ,   灰色50 = ,   红色 = ,   浅橙色 = ,   酸橙色 = ,
    海绿 = ,   水绿色 = ,   浅蓝 = ,       紫罗兰 = ,   灰色40 = ,   粉红 = ,
    金色 = ,   黄色 = ,   鲜绿 = ,   青绿 = ,   天蓝 = ,   梅红 = ,   灰色25 = ,
    玫瑰红 = ,   茶色 = ,   浅黄 = ,   浅绿 = ,   浅青绿 = ,   淡蓝 = ,   淡紫 = ,
    白色 =
 }

说明：

 range.NumberFormatLocal = "@";     //设置单元格格式为文本
 range = (Range)worksheet.get_Range("A1", "E1");     //获取Excel多个单元格区域：本例做为Excel表头
 range.Merge();     //单元格合并动作
 worksheet.Cells[, ] = "Excel单元格赋值";     //Excel单元格赋值
 range.Font.Size = ;     //设置字体大小
 range.Font.Underline=true;     //设置字体是否有下划线
 range.Font.Name="黑体";       设置字体的种类
 range.HorizontalAlignment=XlHAlign.xlHAlignCenter;     //设置字体在单元格内的对其方式
 range.ColumnWidth=;     //设置单元格的宽度
 range.Cells.Interior.Color=System.Drawing.Color.FromArgb(,,).ToArgb();     //设置单元格的背景色
 range.Borders.LineStyle=;     //设置单元格边框的粗细
 range.BorderAround(XlLineStyle.xlContinuous,XlBorderWeight.xlThick,XlColorIndex.xlColorIndexAutomatic,System.Drawing.Color.Black.ToArgb());     //给单元格加边框
 range.Borders.get_Item(Microsoft.Office.Interop.Excel.XlBordersIndex.xlEdgeTop).LineStyle = Microsoft.Office.Interop.Excel.XlLineStyle.xlLineStyleNone; //设置单元格上边框为无边框
     range.EntireColumn.AutoFit();     //自动调整列宽
 Range.HorizontalAlignment= xlCenter;     // 文本水平居中方式
 Range.VerticalAlignment= xlCenter     //文本垂直居中方式
 Range.WrapText=true;     //文本自动换行
 Range.Interior.ColorIndex=;     //填充颜色为淡紫色
 Range.Font.Color=clBlue;     //字体颜色
 xlsApp.DisplayAlerts=false;     //保存Excel的时候，不弹出是否保存的窗口直接进行保存