NPOI操作excel
一、首先引用NPOI用到的dll文件，有点多，但是都需要引用。
相关dll文件可以加群582260284获取。
二、具体实现代码如下
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using CaterBll; using CaterModel; using NPOI.HSSF.UserModel; using NPOI.HSSF.Util; namespace CaterUI.test { public partial class NPOITest : Form { public NPOITest() { InitializeComponent(); } /// <summary> /// 导出excel /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button1_Click(object sender, EventArgs e) { //查询数据，显示到表格上 ManagerInfoBll miBll=new ManagerInfoBll(); var list = miBll.GetList(); dataGridView1.DataSource = list; //进行excel生成创建操作 //1、创建workbook,不指定参数，表示创建一个新的工作本 HSSFWorkbook workbook=new HSSFWorkbook(); //2、创建sheet HSSFSheet sheet = workbook.CreateSheet("管理员"); //3、创建row HSSFRow row = sheet.CreateRow(0); //4、创建cell HSSFCell cell0 = row.CreateCell(0); cell0.SetCellValue("管理员列表"); //5、设置合并单元格 sheet.AddMergedRegion(new NPOI.HSSF.Util.Region(0, 0, 0, 3)); //6、设置单元格居中 HSSFCellStyle styleTitle = workbook.CreateCellStyle(); styleTitle.Alignment = 2;//居中 cell0.CellStyle = styleTitle; //6.1设置字体 HSSFFont fontTitle = workbook.CreateFont(); fontTitle.FontHeightInPoints = 14; styleTitle.SetFont(fontTitle); //7、创建标题行 //7.1创建行 HSSFRow rowTitle = sheet.CreateRow(1); //7.2创建单元格 HSSFCell cellTitle0 = rowTitle.CreateCell(0); cellTitle0.SetCellValue("编号"); cellTitle0.CellStyle = styleTitle; HSSFCell cellTitle1 = rowTitle.CreateCell(1); cellTitle1.SetCellValue("姓名"); cellTitle1.CellStyle = styleTitle; HSSFCell cellTitle2 = rowTitle.CreateCell(2); cellTitle2.SetCellValue("密码"); cellTitle2.CellStyle = styleTitle; HSSFCell cellTitle3 = rowTitle.CreateCell(3); cellTitle3.SetCellValue("类型"); cellTitle3.CellStyle = styleTitle; //8、遍历集合，创建正文数据 //8.1遍历集合 int rowIndex = 2; foreach (var mi in list) { //8.2创建行 HSSFRow rowData = sheet.CreateRow(rowIndex++); //8.3创建数据单元格 HSSFCell cellData0 = rowData.CreateCell(0); cellData0.SetCellValue(mi.MId); HSSFCell cellData1 = rowData.CreateCell(1); cellData1.SetCellValue(mi.MName); HSSFCell cellData2 = rowData.CreateCell(2); cellData2.SetCellValue(mi.MPwd); HSSFCell cellData3 = rowData.CreateCell(3); cellData3.SetCellValue(mi.MType==1?"经理":"店员"); } //保存工作本 FileStream stream = new FileStream(@"C:\Users\q1\Desktop\t1.xls",FileMode.Create); workbook.Write(stream); stream.Close(); stream.Dispose(); } /// <summary> /// 导入excel /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button2_Click(object sender, EventArgs e) { //1、读取excel数据，存入list中 List<ManagerInfo> list=new List<ManagerInfo>(); //1.1读取文件 using (FileStream stream = new FileStream(@"C:\Users\q1\Desktop\t1.xls",FileMode.Open)) { //1.2创建workbook HSSFWorkbook workbook=new HSSFWorkbook(stream); //1.3读取sheet HSSFSheet sheet = workbook.GetSheetAt(0); //1.4读取正文数据，因为0、1行为标题，直接路过 int rowIndex = 2; HSSFRow row = sheet.GetRow(rowIndex++); while (row!=null) { //读到数据时返回行对象，如果没有读到则返回null //1.5读取一行中的对象 ManagerInfo mi=new ManagerInfo(); mi.MId = (int) row.GetCell(0).NumericCellValue; mi.MName = row.GetCell(1).StringCellValue; mi.MPwd = row.GetCell(2).StringCellValue; mi.MType = row.GetCell(3).StringCellValue=="经理"?1:0; list.Add(mi); row = sheet.GetRow(rowIndex++); } } //2、将list赋值给datagridview dataGridView1.DataSource = list; } } }
第二种方式：
1.在NuGet上安装Aspose.Cells或者用微软自带类库也可以 2.需要导出的数据的实例类： using System.ComponentModel; using System.Reflection; using System.Runtime.Serialization; public class OrderReport { [DisplayName("订单编号")] public string orderNo { get; set; } [IgnoreDataMember] public DateTime orderTime { get; set; } [DisplayName("订单时间")] public String orderTime_fomart { get { return orderTime.ToShortDateString(); } } [DisplayName("商品编码")] public string itemCode { get; set; } [DisplayName("商品名称")] public string itemName { get; set; } } View Code 定义实体中加上 [DisplayName("订单编号")]用来导出到Excel生成列名。不需在导出一一对应写列名。[IgnoreDataMember]属性是用来导出是忽略掉不用导出 。 关于特性的介绍详细请参考MSDN。 3.实现导出方法: using System; using System.Collections.Generic; using System.ComponentModel; using System.Linq; using System.Reflection; using System.Runtime.Serialization; using Aspose.Cells; /// <summary> /// 导出类 /// </summary> public class ExcelHerper { /// <summary> /// 获取定义的特性值 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="provider"></param> /// <returns></returns> public static T GetAttribute<T>(ICustomAttributeProvider provider) where T : Attribute { return provider.GetCustomAttributes(typeof(T), true) .Cast<T>().ToArray().FirstOrDefault(); } /// <summary> ///订单报表导出 /// </summary> public static void ExecExportOrderReport() { var orderReportList = new List<OrderReport>() { new OrderReport() { orderNo= "XD00001",orderTime=DateTime.Now, itemCode="G001" ,itemName="辣条"} , new OrderReport() { orderNo= "XD00002", orderTime=DateTime.Now,itemCode="G002" ,itemName="茶蛋"} , new OrderReport() { orderNo= "XD00003", orderTime=DateTime.Now,itemCode="G003" ,itemName="切糕"} , new OrderReport() { orderNo= "XD00004", orderTime=DateTime.Now,itemCode="G004" ,itemName="大虾"} , new OrderReport() { orderNo= "XD00005", orderTime=DateTime.Now,itemCode="G005" ,itemName="帝王蟹"} }; string path = "OrderReport.xlsx"; Console.WriteLine("开始执行导出"); OutDataToExcel(orderReportList, path); Console.WriteLine("导出完成：位置" + path); } /// <summary> /// 导出方法 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="list">导出的数据list</param> /// <param name="title">数据类容标题</param> /// <param name="path">导出excel存放路径</param> public static void OutDataToExcel<T>(List<T> list,string path) { Workbook workbook = new Workbook(); //工作簿 Worksheet sheet = workbook.Worksheets[0]; //工作表 sheet.IsGridlinesVisible = false;//去掉初始单元线 Cells cells = sheet.Cells;//单元格 //为标题设置样式 Style styleTitle = workbook.CreateStyle();//新增样式 styleTitle.HorizontalAlignment = TextAlignmentType.Center;//文字居中 styleTitle.Font.Name = "微软雅黑";//文字字体 styleTitle.Font.Size = 18;//文字大小 styleTitle.Font.IsBold = true;//粗体 //样式1 标题下方的日期 Style style1 = workbook.CreateStyle();//新增样式 style1.HorizontalAlignment = TextAlignmentType.Center;//文字居中 style1.Font.Name = "微软雅黑";//文字字体 style1.Font.Size = 12;//文字大小 //样式2 列名 Style style2 = workbook.CreateStyle();//新增样式 style2.HorizontalAlignment = TextAlignmentType.Center;//文字居中 style2.Font.Name = "微软雅黑";//文字字体 style2.Font.Size = 12;//文字大小 style2.Font.IsBold = true;//粗体 style2.Borders[BorderType.LeftBorder].LineStyle = CellBorderType.Thin; style2.Borders[BorderType.RightBorder].LineStyle = CellBorderType.Thin; style2.Borders[BorderType.TopBorder].LineStyle = CellBorderType.Thin; style2.Borders[BorderType.BottomBorder].LineStyle = CellBorderType.Thin; //样式3 数据的样式 Style style3 = workbook.CreateStyle();//新增样式 style3.HorizontalAlignment = TextAlignmentType.Center;//文字居中 style3.Font.Name = "微软雅黑";//文字字体 style3.Font.Size = 10;//文字大小 style3.Borders[BorderType.LeftBorder].LineStyle = CellBorderType.Thin; style3.Borders[BorderType.RightBorder].LineStyle = CellBorderType.Thin; style3.Borders[BorderType.TopBorder].LineStyle = CellBorderType.Thin; style3.Borders[BorderType.BottomBorder].LineStyle = CellBorderType.Thin; if (list.Count == 0) return; var t = list.First().GetType();//获取列表的类的属性 var properties = t.GetProperties().Where(x => GetAttribute<IgnoreDataMemberAttribute>(x) == null);//筛选出需要导出的字段 var title = GetAttribute<DisplayNameAttribute>(t)?.DisplayName; int Colnum = properties.Count();//表格列数 int Rownum = list.Count;//表格行数 //生成行1 标题行 cells.Merge(0, 0, 1, Colnum);//合并单元格 cells[0, 0].PutValue(title);//填写内容 cells[0, 0].SetStyle(styleTitle); cells.SetRowHeight(0, 38);//行高 //生成行2 日期 cells.Merge(1, 0, 1, Colnum);//合并单元格 cells[1, 0].PutValue(DateTime.Now.ToShortDateString());//填写内容 cells[1, 0].SetStyle(style1); cells.SetRowHeight(1, 20);//行高 //列名及数据行 int i = 0; foreach (var item in properties) { var colName = GetAttribute<DisplayNameAttribute>(item)?.DisplayName;//反射获取字段的DisplayName特性值 cells[2, i].PutValue(colName); cells[2, i].SetStyle(style2); cells.SetColumnWidth(i, colName.Length * 3);//设置列宽 int k = 0; foreach (var rowdata in list) { //反射遍历添加数据 object value = item.GetValue(rowdata, null); string ss = value == null ? "" : value.ToString(); cells[3 + k, i].PutValue(ss); cells[3 + k, i].SetStyle(style3); cells.SetRowHeight(3 + k, 18);//设置行高 k++; } i++; } workbook.Save(path);//生成Excel } } [DisplayName("订单报表")] public class OrderReport { [DisplayName("订单编号")] public string orderNo { get; set; } [IgnoreDataMember] public DateTime orderTime { get; set; } [DisplayName("订单时间")] public string orderTime_fomart { get { return orderTime.ToShortDateString(); } } [DisplayName("商品编码")] public string itemCode { get; set; } [DisplayName("商品名称")] public string itemName { get; set; } }
