C# 使用Epplus导出数据到Excel
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参考:https://www.cnblogs.com/caofangsheng/p/6149843.html
简介：Epplus是一个使用Open Office XML（Xlsx）文件格式，能读写Excel 2007/2010文件的开源组件
功效：支持对excel文档的汇入汇出，图表（excel自带的图表基本都可以实现）的列印
导出思路:
准备:
1.创建对象
public class Student public int ID get; set; public string Name get; set; public string Sex get; set; public int Age get; set; public string Email get; set;
1.创建Excel帮助类
/// <summary> /// Excel导出帮助类 /// </summary> public class ExcelExportHelper public static string ExcelContentType get return "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"; /// <summary> /// List转DataTable /// </summary> /// <typeparam name="T"></typeparam> /// <param name="data"></param> /// <returns></returns> public static DataTable ListToDataTable<T>(List<T> data) PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T)); DataTable dataTable = new DataTable(); for (int i = 0; i < properties.Count; i++) PropertyDescriptor property = properties[i]; dataTable.Columns.Add(property.Name, Nullable.GetUnderlyingType(property.PropertyType) ?? property.PropertyType); object[] values = new object[properties.Count]; foreach (T item in data) for (int i = 0; i < values.Length; i++) values[i] = properties[i].GetValue(item); dataTable.Rows.Add(values); return dataTable; /// <summary> /// 导出Excel /// </summary> /// <param name="dataTable">数据源</param> /// <param name="heading">工作簿Worksheet</param> /// <param name="showSrNo">//是否显示行编号</param> /// <param name="columnsToTake">要导出的列</param> /// <returns></returns> public static byte[] ExportExcel(DataTable dataTable, string heading = "", bool showSrNo = false, params string[] columnsToTake) byte[] result = null; using(ExcelPackage package=new ExcelPackage()) ExcelWorksheet workSheet = package.Workbook.Worksheets.Add(string.Format("0Data", heading)); int startRowFrom = string.IsNullOrEmpty(heading) ? 1 : 3; //开始的行 //是否显示行编号 if (showSrNo) DataColumn dataColumn = dataTable.Columns.Add("#", typeof(int)); dataColumn.SetOrdinal(0); int index = 1; foreach (DataRow item in dataTable.Rows) item[0] = index; index++; //Add Content Into the Excel File workSheet.Cells["A" + startRowFrom].LoadFromDataTable(dataTable, true); // autofit width of cells with small content int columnIndex = 1; foreach (DataColumn item in dataTable.Columns) ExcelRange columnCells = workSheet.Cells[workSheet.Dimension.Start.Row, columnIndex, workSheet.Dimension.End.Row, columnIndex]; int maxLength = columnCells.Max(cell => cell.Value.ToString().Count()); if (maxLength < 150) workSheet.Column(columnIndex).AutoFit(); columnIndex++; // format header - bold, yellow on black using (ExcelRange r = workSheet.Cells[startRowFrom, 1, startRowFrom, dataTable.Columns.Count]) r.Style.Font.Color.SetColor(System.Drawing.Color.White); r.Style.Font.Bold = true; r.Style.Fill.PatternType = OfficeOpenXml.Style.ExcelFillStyle.Solid; r.Style.Fill.BackgroundColor.SetColor(System.Drawing.ColorTranslator.FromHtml("#1fb5ad")); // format cells - add borders using (ExcelRange r = workSheet.Cells[startRowFrom + 1, 1, startRowFrom + dataTable.Rows.Count, dataTable.Columns.Count]) r.Style.Border.Top.Style = ExcelBorderStyle.Thin; r.Style.Border.Bottom.Style = ExcelBorderStyle.Thin; r.Style.Border.Left.Style = ExcelBorderStyle.Thin; r.Style.Border.Right.Style = ExcelBorderStyle.Thin; r.Style.Border.Top.Color.SetColor(System.Drawing.Color.Black); r.Style.Border.Bottom.Color.SetColor(System.Drawing.Color.Black); r.Style.Border.Left.Color.SetColor(System.Drawing.Color.Black); r.Style.Border.Right.Color.SetColor(System.Drawing.Color.Black); // removed ignored columns for (int i = dataTable.Columns.Count - 1; i >= 0; i--) if (i == 0 && showSrNo) continue; if (!columnsToTake.Contains(dataTable.Columns[i].ColumnName)) workSheet.DeleteColumn(i + 1); if (!String.IsNullOrEmpty(heading)) workSheet.Cells["A1"].Value = heading; workSheet.Cells["A1"].Style.Font.Size = 20; workSheet.InsertColumn(1, 1); workSheet.InsertRow(1, 1); workSheet.Column(1).Width = 5; result = package.GetAsByteArray(); return result; /// <summary> /// 导出Excel /// </summary> /// <typeparam name="T"></typeparam> /// <param name="data"></param> /// <param name="heading"></param> /// <param name="isShowSlNo"></param> /// <param name="ColumnsToTake"></param> /// <returns></returns> public static byte[] ExportExcel<T>(List<T> data, string heading = "", bool isShowSlNo = false, params string[] ColumnsToTake) return ExportExcel(ListToDataTable<T>(data), heading, isShowSlNo, ColumnsToTake);
3.获取数据并显示
//数据类 public class StaticDataOfStudent public static List<Student> ListStudent get return new List<Student>() new Student()ID=1,Name="曹操",Sex="男",Email="[email protected]",Age=24, new Student()ID=2,Name="李易峰",Sex="女",Email="[email protected]",Age=24, new Student()ID=3,Name="张三丰",Sex="男",Email="[email protected]",Age=224, new Student()ID=4,Name="孙权",Sex="男",Email="[email protected]",Age=1224, ;
//用于显示的数据类 public class StudentViewModel public List<Student> ListStudent get return StaticDataOfStudent.ListStudent;
实现部分：
1.控制器
public class HomeController : Controller // GET: Home public ActionResult Index() StudentViewModel model = new StudentViewModel(); return View(model); //导出 public FileContentResult ExportToExcel() List<Student> lstStudent = StaticDataOfStudent.ListStudent; string[] columns = "ID", "Name","Age"; byte[] filecontent = ExcelExportHelper.ExportExcel(lstStudent,"", false, columns); return File(filecontent, ExcelExportHelper.ExcelContentType, "MyStudent.xlsx");
2.视图
@model ExportToExcel.Models.StudentViewModel @ ViewBag.Title = "Excel文件导出"; <div class="panel"> <div class="panel-heading"> <a href="@Url.Action("ExportToExcel")" class="btn btn-primary">Export</a> </div> <div class="panel-body"> <table class="table table-striped table-bordered"> <thead> <tr> <th>ID</th> <th>Name</th> <th>Sex</th> <th>Age</th> <th>Email</th> </tr> </thead> <tbody> @foreach (var item in Model.ListStudent) <tr> <td>@item.ID</td> <td>@item.Name</td> <td>@item.Sex</td> <td>@item.Age</td> <td>@item.Email</td> </tr> </tbody> </table> </div> </div>
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