//EF导出示例 var query = from u in orderQuery join pro in dbContext.Project on u.projectNo equals pro.projectNo join org in dbContext.Org on u.orgNo equals org.orgNo into JoinedEmpDept from dept in JoinedEmpDept.DefaultIfEmpty() select new { 学校名称= pro.projectName, 所属班级=dept.orgName, 费用类型=u.orderName, 学生姓名=u.userName, 身份证号=u.userNo, 手机号=u.userPhone, 订单编号=u.orderNo, 费用金额=u.orderAmount/100.0, 支付状态=u.payState==1?"已支付":"未支付", 支付时间=u.payTime, 银行流水号=u.ccbOrderId, 添加时间=u.createTime, 备注=u.remark }; string fileName = DateTime.Now.ToString("yyyyMMddHHmmss") + ".xlsx"; string file = localPath + fileName; using (ExcelHelper excelHelper = new ExcelHelper(file)) { var list = query.OrderByDescending(u => u.添加时间).ToList(); excelHelper.ListToExcel(list,"费用"); return ReturnNode.ReturnSuccess(fileName); }
//EF导出示例2，SQL直接导出 try { var sql = "SELECT * from user "; //输出排名 //sql = string.Format("SELECT @rank :=@rank + 1 AS 排名,A.* FROM ( {0}) A, (SELECT @rank := 0) B;", sql); string fileName = DateTime.Now.ToString("yyyyMMddHHmmss") + ".xlsx"; string file = localPath + fileName; using (ExcelHelper excelHelper = new ExcelHelper(file)) { System.Data.Common.DbCommand cmd = dbContext.Database.Connection.CreateCommand(); cmd.CommandText = sql; cmd.CommandType = CommandType.Text; //转成sqlcommand正常查询语句。 MySql.Data.MySqlClient.MySqlDataAdapter da = new MySql.Data.MySqlClient.MySqlDataAdapter(); da.SelectCommand = cmd as MySql.Data.MySqlClient.MySqlCommand; DataTable dt = new DataTable(); da.Fill(dt); excelHelper.DataTableToExcel(dt, "用户表",true); return ReturnNode.ReturnSuccess(serverPath + fileName); } } catch (Exception ex) { return ReturnNode.ReturnError(ex.Message); }
//导入示例 string file = "C:\\Data\\模板.xlsx"; using (ExcelHelper excelHelper = new ExcelHelper(file)) { DataTable dt = excelHelper.ExcelToDataTable("Sheet1", true); int num = 0; for (int i = 0; i < dt.Rows.Count; ++i) { DataRow row = dt.Rows[i]; string index = row[0].ToString(); string orgName = row[1].ToString(); string orgNo = row[2].ToString(); string orderName = row[3].ToString(); string orderAmount = row[4].ToString(); string userName = row[5].ToString(); string userNo = row[6].ToString(); string userPhone = row[7].ToString(); string remark = row[8].ToString(); num++; } }
using NPOI.HSSF.UserModel; using NPOI.SS.UserModel; using NPOI.XSSF.UserModel; using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Diagnostics; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; namespace YFAPICommon.Lib { class ExcelHelper : IDisposable { private string fileName = null; //文件名 private NPOI.SS.UserModel.IWorkbook workbook = null; private FileStream fs = null; private bool disposed; public ExcelHelper(string fileName) { this.fileName = fileName; disposed = false; } /// <summary> /// 将DataTable数据导入到excel中 /// </summary> /// <param name="data">要导入的数据</param> /// <param name="isColumnWritten">DataTable的列名是否要导入</param> /// <param name="sheetName">要导入的excel的sheet的名称</param> /// <returns>导入数据行数(包含列名那一行)</returns> public int DataTableToExcel(DataTable data, string sheetName, bool isColumnWritten) { int i = 0; int j = 0; int count = 0; ISheet sheet = null; fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite); if (fileName.IndexOf(".xlsx") > 0) // 2007版本 workbook = new XSSFWorkbook(); else if (fileName.IndexOf(".xls") > 0) // 2003版本 workbook = new HSSFWorkbook(); try { if (workbook != null) { sheet = workbook.CreateSheet(sheetName); } else { return -1; } if (isColumnWritten == true) //写入DataTable的列名 { IRow row = sheet.CreateRow(0); for (j = 0; j < data.Columns.Count; ++j) { row.CreateCell(j).SetCellValue(data.Columns[j].ColumnName); } count = 1; } else { count = 0; } for (i = 0; i < data.Rows.Count; ++i) { IRow row = sheet.CreateRow(count); for (j = 0; j < data.Columns.Count; ++j) { row.CreateCell(j).SetCellValue(data.Rows[i][j].ToString()); } ++count; } workbook.Write(fs); //写入到excel return count; } catch (Exception ex) { Console.WriteLine("Exception: " + ex.Message); return -1; } } /// <summary> /// 将List数据导入到excel中 /// </summary> /// <param name="data">要导入的数据</param> /// <param name="sheetName">要导入的excel的sheet的名称</param> /// <returns>导入数据行数(包含列名那一行)</returns> public int ListToExcel<T>(List<T> data, string sheetName) { ISheet sheet = null; fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite); if (fileName.IndexOf(".xlsx") > 0) // 2007版本 workbook = new XSSFWorkbook(); else if (fileName.IndexOf(".xls") > 0) // 2003版本 workbook = new HSSFWorkbook(); try { if (workbook != null) { sheet = workbook.CreateSheet(sheetName); } else { return -1; } PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T)); IRow row0 = sheet.CreateRow(0); for (int i = 0; i < properties.Count; i++) { PropertyDescriptor property = properties[i]; Debug.WriteLine(property.Name); row0.CreateCell(i).SetCellValue(property.Name); } int count = 1; object[] values = new object[properties.Count]; foreach (T item in data) { IRow row = sheet.CreateRow(count); for (int j = 0; j < values.Length; j++) { object obj = properties[j].GetValue(item); Debug.WriteLine(properties[j].GetValue(item)); row.CreateCell(j).SetCellValue(obj==null?"":obj.ToString()); } ++count; } workbook.Write(fs); //写入到excel return count; } catch (Exception ex) { Console.WriteLine("Exception: " + ex.Message); return -1; } } /// <summary> /// 将excel中的数据导入到DataTable中 /// </summary> /// <param name="sheetName">excel工作薄sheet的名称</param> /// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param> /// <returns>返回的DataTable</returns> public DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn) { ISheet sheet = null; DataTable data = new DataTable(); int startRow = 0; try { fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); if (fileName.IndexOf(".xlsx") > 0) // 2007版本 workbook = new XSSFWorkbook(fs); else if (fileName.IndexOf(".xls") > 0) // 2003版本 workbook = new HSSFWorkbook(fs); if (sheetName != null) { sheet = workbook.GetSheet(sheetName); if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet { sheet = workbook.GetSheetAt(0); } } else { sheet = workbook.GetSheetAt(0); } if (sheet != null) { IRow firstRow = sheet.GetRow(0); int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数 if (isFirstRowColumn) { for (int i = firstRow.FirstCellNum; i < cellCount; ++i) { ICell cell = firstRow.GetCell(i); if (cell != null) { string cellValue = cell.StringCellValue; if (cellValue != null) { DataColumn column = new DataColumn(cellValue); data.Columns.Add(column); } } } startRow = sheet.FirstRowNum + 1; } else { startRow = sheet.FirstRowNum; } //最后一列的标号 int rowCount = sheet.LastRowNum; for (int i = startRow; i <= rowCount; ++i) { IRow row = sheet.GetRow(i); if (row == null) break; //continue; //没有数据的行默认是null DataRow dataRow = data.NewRow(); for (int j = row.FirstCellNum; j < cellCount; ++j) { if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null dataRow[j] = row.GetCell(j).ToString(); } data.Rows.Add(dataRow); } } return data; } catch (Exception ex) { Console.WriteLine("Exception: " + ex.Message); //System.Windows.Forms.MessageBox.Show(ex.Message); return null; } } internal void ListToExcel(List<object> list, string v) { throw new NotImplementedException(); } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } protected virtual void Dispose(bool disposing) { if (!this.disposed) { if (disposing) { if (fs != null) fs.Close(); } fs = null; disposed = true; } } } }
