添加引用：Microsoft Excel 11.0 Object Library ;

添加：using Microsoft.Office.Interop.Excel;

一、打开Excel文件＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

    Microsoft.Office.Interop.Excel.Application excel1 = new Microsoft.Office.Interop.Excel.Application();
    Workbook workbook1 = excel1.Workbooks.Open(@"E:\aaa.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
    excel1.Visible = true;

二、新建Excel对象＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

    Microsoft.Office.Interop.Excel.Application excel1 = new Microsoft.Office.Interop.Excel.Application();
    Workbook workbook1 = excel1.Workbooks.Add(XlWBATemplate.xlWBATWorksheet或true);
    worksheet1.Activate();//激活sheet1表
    excel1.Visible = true;

三、新建Excel表＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

　　Microsoft.Office.Interop.Excel.Application excel1 = new Microsoft.Office.Interop.Excel.Application();
    Workbook workbook1 = excel1.Workbooks.Add(true);
    Worksheet worksheet1 = (Worksheet)workbook1.Worksheets["sheet1"];
    Worksheet worksheet1 =(Worksheet)workbook1.Worksheets.Add(Type.Missing,workbook1.Worksheets[1], 1, Type.Missing);
    excel1.Visible = true;

四、重命名Excel表名＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

    Microsoft.Office.Interop.Excel.Application excel1 = new Microsoft.Office.Interop.Excel.Application();
    Workbook workbook1 = excel1.Workbooks.Add(true);
    Worksheet worksheet1 = (Worksheet)workbook1.Worksheets["sheet1"或1];
    worksheet1.Name = "工作计划表";
    excel1.Visible = true;

五、设置或修改Excel表单元格内容＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

    Microsoft.Office.Interop.Excel.Application excel1 = new Microsoft.Office.Interop.Excel.Application();
    Workbook workbook1 = excel1.Workbooks.Add(true);
    Worksheet worksheet1 = (Worksheet)workbook1.Worksheets["sheet1"];
    worksheet1.Cells[1, 1] = "姓名";
    worksheet1.Cells[1, 2] = "性别";
    excel1.Visible = true;

六、设置Excel表行宽和列高＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

    Microsoft.Office.Interop.Excel.Application excel1 = new Microsoft.Office.Interop.Excel.Application();
    Workbook workbook1 = excel1.Workbooks.Add(true);
    Worksheet worksheet1 = (Worksheet)workbook1.Worksheets["sheet1"];
    worksheet1.Columns.ColumnWidth = 20;//全局行宽
    worksheet1.Columns.RowHeight = 20;//全局列高
    Range range1 = (Range) worksheet1.Cells[2, 1];
    range1.Columns.ColumnWidth = 40;//单元格行宽
    range1.Columns.RowHeight = 40;//单元格列高
    excel1.Visible = true;

七、设置Excel表单元格边框＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

    Microsoft.Office.Interop.Excel.Application excel1 = new Microsoft.Office.Interop.Excel.Application();
    Workbook workbook1 = excel1.Workbooks.Add(true);
    Worksheet worksheet1 = (Worksheet)workbook1.Worksheets["sheet1"];
    Range range1 = (Range)worksheet1.Cells[2, 2];
    range1.Borders.Color = System.Drawing.ColorTranslator.ToOle(Color.Red);
    range1.Borders.get_Item(XlBordersIndex.xlEdgeTop).LineStyle = XlLineStyle.xlContinuous;
    range1.Borders.get_Item(XlBordersIndex.xlEdgeRight).LineStyle = XlLineStyle.xlContinuous;
    range1.Borders.get_Item(XlBordersIndex.xlEdgeBottom).LineStyle = XlLineStyle.xlContinuous;
    range1.Borders.get_Item(XlBordersIndex.xlEdgeLeft).LineStyle = XlLineStyle.xlContinuous;
    //也可用后面的代码代替上面四项range1.BorderAround(XlLineStyle.xlContinuous, XlBorderWeight.xlThin, XlColorIndex.xlColorIndexAutomatic,null);
    range1.Borders.get_Item(XlBordersIndex.xlDiagonalDown).LineStyle = XlLineStyle.xlContinuous;//斜杠
    range1.Borders.get_Item(XlBordersIndex.xlDiagonalUp).LineStyle = XlLineStyle.xlContinuous;//反斜杠
    range1.Borders.get_Item(XlBordersIndex.xlDiagonalDown).Color = System.Drawing.ColorTranslator.ToOle(Color.Gold);
    excel1.Visible = true;

八、Excel表块操作＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

　　Microsoft.Office.Interop.Excel.Application excel1 = new Microsoft.Office.Interop.Excel.Application();
    Workbook workbook1 = excel1.Workbooks.Add(true);
    Worksheet worksheet1 = (Worksheet)workbook1.Worksheets["sheet1"];
    Range range1 = worksheet1.get_Range("A2", "E8");//选择操作块
    range1.Font.Bold = true;//设置黑体
    range1.Font.Size = 18;//设置字体大小
　　range1.Font.Name = "仿宋";//设置字体
    range1.Font.Color = System.Drawing.ColorTranslator.ToOle(Color.Blue);//设置字体颜色
    range1.HorizontalAlignment = XlHAlign.xlHAlignCenter;//设置水平对齐方式
    range1.VerticalAlignment = XlVAlign.xlVAlignCenter;//设置垂直对齐方式   
    range1.Value2 = "123\r\n456";
    range1.Borders.get_Item(XlBordersIndex.xlEdgeTop).LineStyle = XlLineStyle.xlContinuous;
    range1.Borders.get_Item(XlBordersIndex.xlEdgeRight).LineStyle = XlLineStyle.xlContinuous;
    range1.Borders.get_Item(XlBordersIndex.xlEdgeBottom).LineStyle = XlLineStyle.xlContinuous;
    range1.Borders.get_Item(XlBordersIndex.xlEdgeLeft).LineStyle = XlLineStyle.xlContinuous;
    //也可用后面的代码代替上面四项range1.BorderAround(XlLineStyle.xlContinuous, XlBorderWeight.xlThin, XlColorIndex.xlColorIndexAutomatic,null);
    range1.Borders.get_Item(XlBordersIndex.xlInsideHorizontal).LineStyle = XlLineStyle.xlContinuous;//块内竖线
    range1.Borders.get_Item(XlBordersIndex.xlInsideVertical).LineStyle = XlLineStyle.xlContinuous;//块内横线
    excel1.Visible = true;

九、Excel表单元格合并＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

　　Microsoft.Office.Interop.Excel.Application excel1 = new Microsoft.Office.Interop.Excel.Application();
    Workbook workbook1 = excel1.Workbooks.Add(true);
    Worksheet worksheet1 = (Worksheet)workbook1.Worksheets["sheet1"];
    Range range1 = worksheet1.get_Range("A2", "E8");//选择操作块
    range1.Value2 = "123\r\n456";
    excel1.Application.DisplayAlerts = false;//使合并操作不提示警告信息
    range1.Merge(false);//参数为True则为每一行合并为一个单元格
    excel1.Application.DisplayAlerts = true;
    excel1.Visible = true;

十、复制Excel表＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

    Microsoft.Office.Interop.Excel.Application excel1 = new Microsoft.Office.Interop.Excel.Application();
    Workbook workbook1 = excel1.Workbooks.Add(true);
    Worksheet worksheet1 = (Worksheet)workbook1.Worksheets["sheet1"];
    worksheet1.Cells[1, 1] = "123";
    worksheet1.Copy(Type.Missing, worksheet1);
    Worksheet worksheet2 =(Worksheet)worksheet1.Next;
    //worksheet2.Name = "Sheet2";
    excel1.Visible = true;

 十一、页面设置＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

　Microsoft.Office.Interop.Excel.Application excel1 = new Microsoft.Office.Interop.Excel.Application();
    Workbook workbook1 = excel1.Workbooks.Add(true);
    excel1.Caption = "我的报表";
    Worksheet worksheet1 = (Worksheet)workbook1.Worksheets["sheet1"];
 　 worksheet1.PageSetup.PaperSize = XlPaperSize.xlPaperA3;//纸张大小
  　worksheet1.PageSetup.PrintTitleRows = "$1:$3";//顶端标题行
      worksheet1.PageSetup.Orientation = XlPageOrientation.xlLandscape;//页面方向为横向
      worksheet1.PageSetup.TopMargin = excel1.CentimetersToPoints(2);//上边距为２厘米(厘米转像素)
     worksheet1.PageSetup.BottomMargin = excel1.CentimetersToPoints(2);//下边距为2厘米(厘米转像素)
   worksheet1.PageSetup.LeftMargin = excel1.CentimetersToPoints(1.5);//左边距为1.5厘米(厘米转像素)
  worksheet1.PageSetup.RightMargin = excel1.CentimetersToPoints(1.5);//右边距为1.5厘米(厘米转像素)
  worksheet1.PageSetup.HeaderMargin = excel1.CentimetersToPoints(1.2);//页眉边距为1.2厘米(厘米转像素)
   worksheet1.PageSetup.FooterMargin = excel1.CentimetersToPoints(1);//页脚边距为1厘米(厘米转像素)
   worksheet1.PageSetup.CenterHorizontally = true;//页面水平居中
   worksheet1.PageSetup.CenterVertically = false;//页面不垂直居中
   worksheet1.PageSetup.CenterFooter = "第&P页，共&N页";//中间页脚内容
   excel1.Visible = true;