记录工作中遇到发邮件带附件的需求，新建控制台应用程序，目录下创建好所需要的定义好的Excel模板！
class Program { static string newExcelPath = string.Empty; static string fileName = string.Empty; static void Main(string[] args) { CopyReportTemplate(); ExportDataToExcel(); SendEmail(); } #region 复制 Excel 模板 -- void CopyReportTemplate() ////// 复制 Excel 模板 /// /// ++++++++++++++++++++++++++++++++++++++++++++ /// liam 2021.03.9 /// 获取应用程序的当前工作目录。 /// System.IO.Directory.GetCurrentDirectory() /// 获取启动了应用程序的可执行文件的路径。 /// System.Windows.Forms.Application.StartupPath /// +++++++++++++++++++++++++++++++++++++++++++++ /// /// private static void CopyReportTemplate() { string excelTemplatePath = System.Windows.Forms.Application.StartupPath + "\\出行申报报表.xlsx"; //Directory.GetCurrentDirectory() + "\\出行报表.xlsx"; string str = DateTime.Now.ToString("yyyyMMdd"); fileName = "出行申报报表-" + str; newExcelPath =System.Windows.Forms.Application.StartupPath + "\\Report\\" + fileName + ".xlsx"; //Directory.GetCurrentDirectory() + "\\Report\\" + fileName + ".xlsx"; File.Delete(newExcelPath); File.Copy(excelTemplatePath, newExcelPath); } #endregion #region 获取报表数据 -- DataSet GetReportData() /// /// 获取报表数据 /// /// private static DataSet GetReportData() { DataSet ds = new DataSet(); string sql0 = "pc_Select_CheckHolidayInformationData_No"; string date = DateTime.Now.ToString("yyyy-MM-dd"); SqlParameter[] sp = { new SqlParameter("@date",date) }; DataTable table0 = GetDataTable(CommandType.StoredProcedure, sql0, sp); table0.TableName = "未申报记录"; string sql1 = "pc_Select_CheckHolidayInformationData_Yes"; DataTable table1 = GetDataTable(CommandType.StoredProcedure, sql1); table1.TableName = "已申报记录"; ds.Tables.Add(table0); ds.Tables.Add(table1); return ds; } #endregion #region 导出数据至 Excel -- static void ExportDataToExcel() /// /// 导出数据至 Excel /// private static void ExportDataToExcel() { XSSFWorkbook workbook = null; using (FileStream file = new FileStream(newExcelPath, FileMode.Open, FileAccess.Read)) { workbook = new XSSFWorkbook(file); file.Close(); } ICellStyle style = CellStyle(workbook); ICellStyle styleRed = CellStyle(workbook); styleRed.FillPattern = FillPattern.SolidForeground; styleRed.FillForegroundColor = HSSFColor.Coral.Index; DataSet ds = GetReportData(); for (int i = 0; i < ds.Tables.Count; i++) { DataTable table = ds.Tables[i]; ISheet sheet = workbook.GetSheet(table.TableName); for (int j = 0; j < table.Rows.Count; j++) { IRow row = sheet.CreateRow(1 + j); row.Height = 18 * 20; for (int k = 0; k < table.Columns.Count; k++) { string colName = table.Columns[k].ColumnName; string str = CheckFieldIsNullOrEmpty(table, j, colName); ICell cell = row.CreateCell(k); cell.SetCellValue(str); } } } using (FileStream fs = new FileStream(newExcelPath, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite)) { workbook.Write(fs); fs.Close(); } } #endregion #region 创建 Excel 单元格样式 -- ICellStyle CellStyle(XSSFWorkbook workbook) /// /// 创建 Excel 单元格样式 /// /// /// private static ICellStyle CellStyle(XSSFWorkbook workbook) { IFont fontAll = workbook.CreateFont(); fontAll.FontName = "Microsoft YaHei"; fontAll.FontHeight = 10 * 20; ICellStyle ItemCellStyle = workbook.CreateCellStyle(); ItemCellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin; ItemCellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin; ItemCellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin; ItemCellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin; ItemCellStyle.BottomBorderColor = HSSFColor.Grey25Percent.Index; ItemCellStyle.LeftBorderColor = HSSFColor.Grey25Percent.Index; ItemCellStyle.RightBorderColor = HSSFColor.Grey25Percent.Index; ItemCellStyle.TopBorderColor = HSSFColor.Grey25Percent.Index; ItemCellStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Left; ItemCellStyle.VerticalAlignment = VerticalAlignment.Center; ItemCellStyle.SetFont(fontAll); return ItemCellStyle; } #endregion #region 检查 Table CELL 数据 -- string CheckFieldIsNullOrEmpty(DataTable table, string key) /// /// 检查 Table CELL 数据 /// /// /// /// public static string CheckFieldIsNullOrEmpty(DataTable table, string key) { string value = string.Empty; if (table != null && table.Rows.Count > 0) { if (!string.IsNullOrEmpty(table.Rows[0][key].ToString())) { value = table.Rows[0][key].ToString(); } } return value; } /// /// 检查 Table CELL 数据 /// /// /// /// /// public static string CheckFieldIsNullOrEmpty(DataTable table, int rowIndex, string key) { string value = string.Empty; if (table != null && table.Rows.Count > 0) { if (!string.IsNullOrEmpty(table.Rows[rowIndex][key].ToString())) { value = table.Rows[rowIndex][key].ToString(); } } return value; } #endregion #region 发送邮件 -- static void SendEmail() /// /// 发送邮件 /// private static void SendEmail() { //string sql = "pc_SendEmail_CheckUserReport"; //SqlParameter[] sp = { // new SqlParameter("@path",newExcelPath), // new SqlParameter("@fileName",fileName) //}; //int i = NonQuery(CommandType.StoredProcedure, sql, sp); //设置邮件的服务器 string host = "IP地址"; //替换成你的hotmail账户 string mailAddress = "发邮件地址"; //目标邮件地址。可添加多个地址，逗号分隔 string[] ToAddress = { "目标邮件地址" }; string[] CcAddress = { "抄送邮件地址" }; SmtpClient smtp = new SmtpClient(host); smtp.EnableSsl = false; //开启安全连接。 smtp.DeliveryMethod = SmtpDeliveryMethod.Network; //使用网络传送 StringBuilder sb = new StringBuilder(); sb.AppendLine("Dear All:
"); sb.AppendLine("出行申报情况，请查阅附件，谢谢。"); sb.AppendLine("
Best regards, CMOA System;
"); sb.AppendLine("This is auto-generated email, please do not reply. Thank you for your attention !
"); MailMessage message = new MailMessage(); //创建邮件 message.From = new MailAddress(mailAddress); message.Subject = fileName; message.IsBodyHtml = true; for (int i = 0; i < ToAddress.Length; i++) { message.To.Add(ToAddress[i]); } for (int i = 0; i < CcAddress.Length; i++) { message.CC.Add(CcAddress[i]); } message.Body = sb.ToString(); //string newExcelPath = @"D:\MID PDF.zip"; string MIME = MimeMapping.GetMimeMapping(newExcelPath);//文件的MediaType MIME //message.AlternateViews.Add(new AlternateView(fileAddress,MIME)); //发送附加内容（附加的内容为文件中的内容） //发送附加件 message.Attachments.Add(new Attachment(newExcelPath, MIME)); smtp.Send(message); //发送邮件 } #endregion #region DataTable -- static DataTable GetDataTable(CommandType cmdType, string cmdText, params SqlParameter[] cmdParams) ////// DataTable /// /// /// /// /// public static DataTable GetDataTable(CommandType cmdType, string cmdText, params SqlParameter[] cmdParams) { DateTime starttime = DateTime.Now; //起始时间 using (SqlConnection Connection = new SqlConnection("Server=IP地址;DataBase=库名;Uid=账号;Pwd=密码")) { DataTable dt = new DataTable(); Connection.Open(); SqlDataAdapter da = new SqlDataAdapter(cmdText, Connection); try { da.SelectCommand.CommandTimeout = 300; da.SelectCommand.CommandType = cmdType; //设置命令类型 da.SelectCommand.Parameters.AddRange(cmdParams); da.Fill(dt); return dt; } catch (System.Exception ex) { Console.WriteLine(ex.Message); da.Dispose(); Connection.Close(); return null; } finally { Connection.Close(); Connection.Dispose(); } } } #endregion #region 执行数据的增、删、改方法 -- static int NonQuery(CommandType type, string CommandText, string sysName, params SqlParameter[] pars) /// /// 执行数据的增、删、改方法 /// /// 要执行的数据库命令类型 /// 要执行的SQL语句或存储过程 /// 所需的参数列表 /// 受影响的行数 public static int NonQuery(CommandType type, string CommandText, params SqlParameter[] pars) { DateTime starttime = DateTime.Now; //起始时间 int i = 0; using (SqlConnection Connection = new SqlConnection("Server=IP地址;DataBase=库名;Uid=账号;Pwd=密码")) { Connection.Open(); //实例化数据库命令对象 SqlCommand cmd = new SqlCommand(CommandText, Connection); try { cmd.CommandTimeout = 0; //设置命令执行类型 cmd.CommandType = type; //设置SQL语句或存储过程参数 SqlParameter[] sp = new SqlParameter[pars.Length]; sp = pars; cmd.Parameters.AddRange(sp); //调用方法得到SqlDataReader对象 i = cmd.ExecuteNonQuery(); return i; } catch (Exception err) { cmd.Dispose(); Connection.Close(); throw new Exception(err.Message); } finally { Connection.Close(); Connection.Dispose(); } } } #endregion }