自用datatable导出到excel

//设置程序运行语言
                System.Globalization.CultureInfo CurrentCI = System.Threading.Thread.CurrentThread.CurrentCulture;
                System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US");
                //创建Application
                Excel.Application excelApp = new Excel.Application();
                if (excelApp == null)
                {
                    MessageBox.Show("Excel启动失败！");
                }
                //设置是否显示警告窗体
                //excelApp.DisplayAlerts = false;
                //设置是否显示Excel
                excelApp.Visible = true;
                //禁止刷新屏幕
                //excelApp.ScreenUpdating = false;
                //根据路径path打开
                string path = "";
                if (checkBox13.Checked)//采用英文模版
                {
                    path = System.AppDomain.CurrentDomain.BaseDirectory + "压力容器工程量清单模板-英文.xlsx";
                }
                else
                {
                    path = System.AppDomain.CurrentDomain.BaseDirectory + "压力容器工程量清单模板-中文.xlsx";
                }
                Excel.Workbook xlsWorkBook = excelApp.Workbooks.Open(path, System.Type.Missing, System.Type.Missing, System.Type.Missing,
                System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing,
                System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing);
                //获取Worksheet对象
                Excel.Worksheet xlsWorkSheet = (Worksheet)xlsWorkBook.Worksheets["MTO for static equipment"];
                //导出datatable
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    for (int j = 0; j < dt.Columns.Count; j++)
                    {
                        xlsWorkSheet.Rows.Cells[i + 4, j + 1] = dt.Rows[i][j].ToString();//excel的第4行开始为数据
                    }
                }

类库

        /// <summary>
        /// 获取Excel文件数据表列表
        /// </summary>
        public static ArrayList GetExcelTables(string ExcelFileName)
        {
            DataTable dt = new DataTable();
            ArrayList TablesList = new ArrayList();
            if (File.Exists(ExcelFileName))
            {
                using (OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Data Source=" + ExcelFileName))
                {
                    try
                    {
                        conn.Open();
                        dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
                    }
                    catch (Exception exp)
                    {
                        throw exp;
                    }

                    //获取数据表个数
                    int tablecount = dt.Rows.Count;
                    for (int i = 0; i < tablecount; i++)
                    {
                        string tablename = dt.Rows[i][2].ToString().Trim().TrimEnd('$');
                        if (TablesList.IndexOf(tablename) < 0)
                        {
                            TablesList.Add(tablename);
                        }
                    }
                }
            }
            return TablesList;
        }


        /// <summary>
        /// 将数据导出至Excel文件
        /// </summary>
        /// <param name="dtData">DataTable对象</param>
        /// <param name="FileName">Excel文件路径</param>
        public static bool DataTableToExcel(DataTable dt, string fileName)
        {
            //SaveFileDialog sfd = new SaveFileDialog();
            //sfd.Filter = "Excel文件(*.xls)|*.xls|所有文件(*.*)|*.*";
            //sfd.Title = "Excel文件导出";
            //string fileName = "";
            //if (sfd.ShowDialog() == DialogResult.OK)
            //{
                //fileName = sfd.FileName;
                Excel.Application app = new Excel.Application();
                if (app == null)
                {
                    MessageBox.Show("Excel启动失败！");
                    return false;
                }
                try
                {
                    app.Visible = false;
                    Excel.Workbook xlWorkBook = app.Workbooks.Add(Type.Missing);
                    Excel.Worksheet xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
                    int i;
                    for (i = 0; i < dt.Columns.Count; i++)
                    {
                        xlWorkSheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;
                    }
                    for (i = 0; i < dt.Rows.Count; i++)
                    {
                        for (int j = 0; j < dt.Columns.Count; j++)
                        {
                            string tt = dt.Rows[i][j].ToString();
                            xlWorkSheet.Cells[i + 2, j + 1] = tt;
                        }
                    }
                    xlWorkBook.SaveAs(fileName, Excel.XlFileFormat.xlWorkbookNormal, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
                    xlWorkBook.Close(true, Type.Missing, Type.Missing);
                    app.Quit();

                    xlWorkSheet = null;
                    xlWorkBook = null;

                    return true;
                }
                catch (System.Exception exc)
                {
                    MessageBox.Show("excel运行错误：" + exc.Message);
                    return false;
                }
            //}
            //else
            //{
            //    return false;
            //}
        }
        /// <summary>
        /// 将Excel文件导出至DataTable(第一行作为表头)
        /// </summary>
        /// <param name="ExcelFilePath">Excel文件路径</param>
        /// <param name="TableName">数据表名，如果数据表名错误，默认为第一个数据表名</param>
        public static DataTable InputFromExcel(string ExcelFilePath, string TableName)
        {
            if (!File.Exists(ExcelFilePath))
            {
                throw new Exception("Excel文件不存在！");
            }

            //如果数据表名不存在，则数据表名为Excel文件的第一个数据表
            ArrayList TableList = new ArrayList();
            TableList = GetExcelTables(ExcelFilePath);

            if (TableName.IndexOf(TableName) < 0)
            {
                TableName = TableList[0].ToString().Trim();
            }

            DataTable table = new DataTable();
            OleDbConnection dbcon = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFilePath + ";Extended Properties=Excel 8.0");
            OleDbCommand cmd = new OleDbCommand("select * from [" + TableName + "$]", dbcon);
            OleDbDataAdapter adapter = new OleDbDataAdapter(cmd);

            try
            {
                if (dbcon.State == ConnectionState.Closed)
                {
                    dbcon.Open();
                }
                adapter.Fill(table);
            }
            catch (Exception exp)
            {
                throw exp;
            }
            finally
            {
                if (dbcon.State == ConnectionState.Open)
                {
                    dbcon.Close();
                }
            }
            return table;
        }