使用EPPLUS操作EXcel

1 下载Epplus最新版：http://epplus.codeplex.com/

2 在项目中添加引用 EEPULS.dll（测试环境Win7+V2010旗舰）

3  添加using引用

　　using OfficeOpenXml;
　　using OfficeOpenXml.Drawing;
　　using OfficeOpenXml.Drawing.Chart;
　　using OfficeOpenXml.Style;

4 read Excel文件

    readExcel文件到Datatable

        private void button2_Click(object sender, EventArgs e)

        {

            string pfilePath = "";

            OpenFileDialog ofd = new OpenFileDialog();

            ofd.Filter = "*.xls|*.xlsx";

            if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK)

            {

                pfilePath = ofd.FileName;

            }

            if (string.IsNullOrEmpty(pfilePath))

            {

                MessageBox.Show("没有选中文件");

                return;

            }



            FileInfo existingFile = new FileInfo(pfilePath);

            try

            {

                ExcelPackage package = new ExcelPackage(existingFile);

                int vSheetCount = package.Workbook.Worksheets.Count; //获取总Sheet页



                ExcelWorksheet worksheet = package.Workbook.Worksheets[1];//选定 指定页



                int maxColumnNum = worksheet.Dimension.End.Column;//最大列

                int minColumnNum = worksheet.Dimension.Start.Column;//最小列



                int maxRowNum = worksheet.Dimension.End.Row;//最小行

                int minRowNum = worksheet.Dimension.Start.Row;//最大行



                DataTable vTable = new DataTable();

                DataColumn vC;

                for (int j = 1; j <= maxColumnNum; j++)

                {

                    vC = new DataColumn("A_" + j, typeof(string));

                    vTable.Columns.Add(vC);

                }

                if (maxRowNum > 200)

                {

                    maxRowNum = 200;

                }

                for (int n = 1; n <= maxRowNum; n++)

                {

                    DataRow vRow = vTable.NewRow();

                    for (int m = 1; m <= maxColumnNum; m++)

                    {

                        vRow[m - 1] = worksheet.Cells[n, m].Value;

                    }

                    vTable.Rows.Add(vRow);

                }

                this.dataGridView1.DataSource = vTable;

            }

            catch (Exception vErr)

            {

                MessageBox.Show(vErr.Message);

            }

        }

5 write Excel文件

5.1 直接生成EXcel示例

        private void button1_Click(object sender, EventArgs e)

        {

                 

            OfficeOpenXml.ExcelPackage ep = new OfficeOpenXml.ExcelPackage();

            OfficeOpenXml.ExcelWorkbook wb = ep.Workbook;

            OfficeOpenXml.ExcelWorksheet ws = wb.Worksheets.Add("我的工作表");

            //配置文件属性  

            wb.Properties.Category = "类别";

            wb.Properties.Author = "作者";

            wb.Properties.Comments = "备注";

            wb.Properties.Company = "公司";

            wb.Properties.Keywords = "关键字";

            wb.Properties.Manager = "管理者";

            wb.Properties.Status = "内容状态";

            wb.Properties.Subject = "主题";

            wb.Properties.Title = "标题";

            wb.Properties.LastModifiedBy = "最后一次保存者";

            //写数据  

            ws.Cells[1, 1].Value = "Hello";



            ws.Column(1).Width=40;//修改列宽  

            ws.Cells["B1"].Value = "World";

            ws.Cells[3, 3, 3, 5].Merge = true;

            ws.Cells[3, 3].Value = "Cells[3, 3, 3, 5]合并";

            ws.Cells["A4:D5"].Merge = true;

            ws.Cells["A4"].Value = "Cells[\"A4:D5\"]合并";



            SaveFileDialog sfd = new SaveFileDialog();

            sfd.Filter = "*.xls|*.xlsx";

            if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)

            {

                FileInfo file = new FileInfo(sfd.FileName); 

                ep.File = file;

                ep.Save();

                MessageBox.Show("保存成功");

            }

            else

            {

                MessageBox.Show("取消保存");

            }

        }

5.2 从DataGridView导出至Excel

      将DataGridView显示内容导出至Excel（DataTable只需小改动即可）

     

            OfficeOpenXml.ExcelPackage ep = new OfficeOpenXml.ExcelPackage();

            OfficeOpenXml.ExcelWorkbook wb = ep.Workbook;

            OfficeOpenXml.ExcelWorksheet ws = wb.Worksheets.Add("我的工作表");

            //配置文件属性，可以不注释掉  

            //wb.Properties.Category = "类别";

            //wb.Properties.Author = "作者";

            //wb.Properties.Comments = "备注";

            //wb.Properties.Company = "公司";

            //wb.Properties.Keywords = "关键字";

            //wb.Properties.Manager = "管理者";

            //wb.Properties.Status = "内容状态";

            //wb.Properties.Subject = "主题";

            //wb.Properties.Title = "标题";

            //wb.Properties.LastModifiedBy = "最后一次保存者";



            for (int i = 0; i < dataGridView1.Rows.Count; i++)

            {

                for (int j = 1; j < dataGridView1.Columns.Count; j++)

                {

                    if (dataGridView1.Columns[j-1].Visible == true)

                    {

                        if (dataGridView1.Rows[i].Cells[j-1].Value == null)

                        {

                            ws.Cells[i+1, j].Value = " ";

                        }

                        else

                        {

                            string rowstr = dataGridView1.Rows[i].Cells[j-1].Value.ToString();

                            if (rowstr.IndexOf("\r\n") > 0)

                                rowstr = rowstr.Replace("\r\n", " ");

                            if (rowstr.IndexOf("\t") > 0)

                                rowstr = rowstr.Replace("\t", " ");

                            ws.Cells[i+1, j].Value = rowstr;

                        }

                    }

                }

            } 



            SaveFileDialog sfd = new SaveFileDialog();

            sfd.Filter = "*.xls|*.xlsx";

            if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)

            {

                FileInfo file = new FileInfo(sfd.FileName);

                ep.File = file;

                ep.Save();

                MessageBox.Show("保存成功");

            }

            else

            {

                MessageBox.Show("取消保存");

            }

 

上述代码大部分来源网络，只进行过小改动，下面是原文和资料地址：

      http://blog.csdn.net/jimmy2248/article/details/8363697

      http://blog.csdn.net/zhoufoxcn/article/details/14112473

      http://www.cnblogs.com/liudeyun/p/3535740.html

      http://blog.163.com/china__xuhua/blog/static/19972316920136335721285/