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 = 100;

//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 = 10;

// 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[10, 5], _workSheet .Cells[10, 5]);
??????????? excelRange.Select();
??????????? excelApplication.ActiveWindow.FreezePanes = true;

//Borders.LineStyle 单元格边框线
Excel.Range excelRange = _workSheet.get_Range(_workSheet.Cells[2, 2], _workSheet.Cells[4, 6]);
//单元格边框线类型(线型,虚线型)
excelRange.Borders.LineStyle = 1;
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 =3;

//设置字体大小
excelRange.Font.Size = 15;
//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 = 15;
//设置单元格的背景色
excelRange.Cells.Interior.Color = System.Drawing.Color.FromArgb(255, 204, 153).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 = 39;

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

/// <summary>
/// 常用颜色定义,对就Excel中颜色名
/// </summary>
public enum ColorIndex
{
?? 无色 = -4142,?? 自动 = -4105,?? 黑色 = 1,?? 褐色 = 53,?? 橄榄 = 52,?? 深绿 = 51,?? 深青 = 49,
?? 深蓝 = 11,?? 靛蓝 = 55,?? 灰色80 = 56,?? 深红 = 9,?? 橙色 = 46,?? 深黄 = 12,?? 绿色 = 10,
?? 青色 = 14,?? 蓝色 = 5,?? 蓝灰 = 47,?? 灰色50 = 16,?? 红色 = 3,?? 浅橙色 = 45,?? 酸橙色 = 43,
?? 海绿 = 50,?? 水绿色 = 42,?? 浅蓝 = 41,?????? 紫罗兰 = 13,?? 灰色40 = 48,?? 粉红 = 7,
?? 金色 = 44,?? 黄色 = 6,?? 鲜绿 = 4,?? 青绿 = 8,?? 天蓝 = 33,?? 梅红 = 54,?? 灰色25 = 15,
?? 玫瑰红 = 38,?? 茶色 = 40,?? 浅黄 = 36,?? 浅绿 = 35,?? 浅青绿 = 34,?? 淡蓝 = 37,?? 淡紫 = 39,
?? 白色 = 2
}

?

1.range.NumberFormatLocal = "@";???? //设置单元格格式为文本??
2.?
3.range = (Range)worksheet.get_Range("A1", "E1");???? //