C#导出Excel动态列

一、用StreamWrite流对象，导出Excel

 1、

 string _sPath = GenerateSalaryMonthlyReport(dgvSalarySum);

 System.Diagnostics.Process.Start(_sPath);

2、

 public String GenerateSalaryMonthlyReport(DataGridView dgvData)

        {

            String _sPath = String.Format(@".\{0}.txt", BaseClass.getGUID());

            String _sGoal = String.Format(@"{0}{1}.xls", System.Configuration.ConfigurationManager.AppSettings["Statistic"],

                                                         BaseClass.ExcelFileName("员工每月薪酬表"));



            System.IO.StreamWriter _sw = new System.IO.StreamWriter(_sPath, false, Encoding.Default);



            //表头

            _sw.WriteLine("人力宝人力资源管理系统V2.0");

            _sw.WriteLine("薪酬管理模块 <<员工每月薪酬表>>");

            _sw.WriteLine();



            _sw.Write(String.Format("{0}\t", "序号"));

            foreach (DataGridViewColumn dgvc in dgvData.Columns)

            {

                if (dgvc.Visible)

                {

                    _sw.Write(String.Format("{0}\t", dgvc.HeaderText));

                }

            }

            _sw.Write(String.Format("{0}\t{1}\t{2}", "员工签字", "日期", "备注"));

            _sw.WriteLine();



            int i = 1;

            foreach (DataGridViewRow dgvr in dgvData.Rows)

            {

                _sw.Write(String.Format("{0}", i));

                for (int j = 0; j < dgvData.Columns.Count - 1; j++)

                {

                    if (dgvData.Columns[j].Visible)

                    {

                        if (j == 3)

                        {

                            _sw.Write(String.Format("\t'{0}", dgvr.Cells[j].Value));

                        }

                        else 

                        {

                         _sw.Write(String.Format("\t{0}", dgvr.Cells[j].Value));

                        }

                    }

                }



                i++;

                _sw.WriteLine();

            }

            _sw.WriteLine();

            _sw.WriteLine(String.Format("{0}\t\t{1}\t\t\t\t{2}\t\t{3}", "制表人", "制表日期", "审核人", "审核日期"));

            _sw.Close();

            System.IO.File.Move(_sPath, _sGoal);

            return _sGoal;

        }