C#导出Excel,并且设置Excel单元格格式，合并单元格.

注：要添加COM组件 Microsoft Excel 11.0 Object Library  引用。

具体代码如下：

using System;

using System.Collections.Generic;

using System.Text;

using System.Data.SqlClient;

using Excel;

using System.Reflection;

using System.Data;

using System.Data.OleDb;

namespace RecruitmentReport

{

    classdoExcel

    {

        enumColumnName {A1=1,B1,C1,D1,E1,F1,G1,H1,I1,J1,K1,L1,M1,N1,O1,P1,Q1,R1,S1,T1,U1,V1,W1,X1,Y1,Z1}

        /// <summary>

        /// 导出到Execl

        /// </summary>

        /// <param name="dt">数据集</param>

        /// <param name="strSheetName">工作部名称</param>

        /// <param name="pathloading">保存路径</param>

        /// <param name="title">标题名</param>

        publicvoid doExport(DataSet dt, string strSheetName, string pathloading, string title)

        {

            int columnIndex = dt.Tables[0].Columns.Count;

            string cName =((ColumnName)columnIndex).ToString();

            Excel.Application excel = new Excel.Application();  //Execl的操作类

            Excel.Workbook bookDest =(Excel.Workbook)excel.Workbooks.Add(Missing.Value);

            Excel.Worksheet sheetDest = bookDest.Worksheets.Add(Missing.Value, Missing.Value, Missing.Value, Missing.Value) as Excel.Worksheet;//给工作薄添加一个Sheet   

            sheetDest.Name = strSheetName;

            for (int i = bookDest.Worksheets.Count; i >1; i--)

            {

                Worksheet wt = (Worksheet)bookDest.Worksheets[i]; 

                if (wt.Name != strSheetName)

                {

                    wt.Delete();

                }

            }

            int rowIndex = 2;

            int colIndex = 0;

            Range rngRow = (Excel.Range)sheetDest.Columns[1, Type.Missing];

            rngRow.UseStandardWidth = 70;

            Range rngA = (Range)sheetDest.Columns["A", Type.Missing];//设置单元格格式

            rngA.NumberFormatLocal = "@";//字符型格式

            Range rngJ = (Range)sheetDest.Columns["J", Type.Missing];

            rngJ.NumberFormatLocal = "@";

            Range rngQ = (Range)sheetDest.Columns["Q", Type.Missing];

            rngQ.NumberFormatLocal = "@";

            Range rngE = (Range)sheetDest.Columns["E", Type.Missing];

            rngE.NumberFormatLocal = @"yyyy-mm-dd";//日期型格式

            sheetDest.get_Range("A1", cName).Merge(sheetDest.get_Range("A1", cName).MergeCells);//合并单元格

            excel.Application.Workbooks.Add(true);

            try

            {

                Range rngfirst = (Excel.Range)sheetDest.Cells[1, 1];

                sheetDest.Cells[1, 1] = title + System.DateTime.Now.Month.ToString().PadLeft(2, '0') + System.DateTime.Now.Day.ToString().PadLeft(2, '0') + System.DateTime.Now.Year.ToString();

                rngfirst.Font.Size = 14;

                rngfirst.Font.Name = "Calibri";//设置单元格字体

                rngfirst.RowHeight = 18;

                rngfirst.HorizontalAlignment = XlHAlign.xlHAlignCenter;

                rngfirst.Font.Bold = true;

                rngfirst.Borders.LineStyle = XlLineStyle.xlContinuous;//设置单元格边框

                foreach (DataColumn col in dt.Tables[0].Columns)

                {

                        colIndex++;

                        Range rng = (Excel.Range)sheetDest.Cells[2, colIndex];

                            sheetDest.Cells[2, colIndex] = col.ColumnName;//Execl中的第一列把DataTable的列名先导进去

                            rng.Font.Name = "Calibri";

                            rng.Font.Size = 11;

                            rng.Font.Bold = true;

                            rng.Font.Color = ConsoleColor.Blue;

                            rng.HorizontalAlignment = XlHAlign.xlHAlignCenter;

                            rng.RowHeight = 15;

                            rng.Borders.LineStyle = XlLineStyle.xlContinuous;

                            rng.ColumnWidth = 15.5;

                     //   sheetDest.Range[1, colIndex].Font.Bold = false;

                }

                //导入数据行

                foreach (DataRow row in dt.Tables[0].Rows)

                {

                    rowIndex++;

                    colIndex = 0;

                    foreach (DataColumn col in dt.Tables[0].Columns)

                    {

                               colIndex++;

                                sheetDest.Cells[rowIndex, colIndex] = row[col.ColumnName].ToString();

                                Range rng01 = (Excel.Range)sheetDest.Cells[rowIndex, colIndex];

                                rng01.HorizontalAlignment = XlHAlign.xlHAlignCenter;

                                rng01.Borders.LineStyle = XlLineStyle.xlContinuous;

                                rng01.RowHeight = 15;

                                rng01.Font.Name = "Calibri";

                                rng01.Font.Size = 11;

                        }   

                } 

            }

            catch  { thrownewException(); }

            bookDest.Saved = true;

            bookDest.SaveCopyAs(pathloading);//保存

            excel.Quit();

            excel = null;

            GC.Collect();//垃圾回收   

        }

   }

}

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