C# 使用Epplus导出数据到Excel
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
安装:NuGet
导出思路:

准备:
1.创建对象
namespace Models
{
public class Student
{
public int ID { get; set; }
{
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
using OfficeOpenXml;
using OfficeOpenXml.Style;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
using OfficeOpenXml.Style;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
namespace Common
{
/// <summary>
/// Excel导出帮助类
/// </summary>
public class ExcelExportHelper
{
public static string ExcelContentType => "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);
}
/// 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;
}
}
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;
using (ExcelPackage package = new ExcelPackage())
{
ExcelWorksheet workSheet = package.Workbook.Worksheets.Add($"{heading}Data");
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 = ExcelFillStyle.Solid;
r.Style.Fill.BackgroundColor.SetColor(System.Drawing.ColorTranslator.FromHtml("#1fb5ad"));
}
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 = 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;
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);
}
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);
}
}
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.Cells["A1"].Value = heading;
workSheet.Cells["A1"].Style.Font.Size = 20;
workSheet.InsertColumn(1, 1);
workSheet.InsertRow(1, 1);
workSheet.Column(1).Width = 5;
}
workSheet.InsertRow(1, 1);
workSheet.Column(1).Width = 5;
}
result = package.GetAsByteArray();
}
return result;
}
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(data), heading, isShowSlNo, columnsToTake);
}
/// 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(data), heading, isShowSlNo, columnsToTake);
}
}
}
}
3.获取数据并显示
//数据类
using Models;
using System.Collections.Generic;
using System.Collections.Generic;
namespace BLL
{
//数据类
public class StaticDataOfStudent
{
public static List<Student> ListStudent => new List<Student>
{
new Student {ID = 1, Name = "曹操", Sex = "男", Email = "caocao@163.com", Age = 24},
new Student {ID = 2, Name = "李易峰", Sex = "女", Email = "lilingjie@sina.com.cn", Age = 24},
new Student {ID = 3, Name = "张三丰", Sex = "男", Email = "zhangsanfeng@qq.com", Age = 224},
new Student {ID = 4, Name = "孙权", Sex = "男", Email = "sunquan@163.com", Age = 1224},
};
}
}
{
//数据类
public class StaticDataOfStudent
{
public static List<Student> ListStudent => new List<Student>
{
new Student {ID = 1, Name = "曹操", Sex = "男", Email = "caocao@163.com", Age = 24},
new Student {ID = 2, Name = "李易峰", Sex = "女", Email = "lilingjie@sina.com.cn", Age = 24},
new Student {ID = 3, Name = "张三丰", Sex = "男", Email = "zhangsanfeng@qq.com", Age = 224},
new Student {ID = 4, Name = "孙权", Sex = "男", Email = "sunquan@163.com", Age = 1224},
};
}
}
//用于显示的数据类
using BLL;
using Models;
using System.Collections.Generic;
using Models;
using System.Collections.Generic;
namespace EPPlusMvcDemo2.Models
{
public class StudentViewModel
{
public List<Student> ListStudent => StaticDataOfStudent.ListStudent;
}
}
{
public class StudentViewModel
{
public List<Student> ListStudent => StaticDataOfStudent.ListStudent;
}
}
实现部分:
1.控制器
using BLL;
using Common;
using EPPlusMvcDemo2.Models;
using Models;
using System.Collections.Generic;
using System.Web.Mvc;
using Common;
using EPPlusMvcDemo2.Models;
using Models;
using System.Collections.Generic;
using System.Web.Mvc;
namespace EPPlusMvcDemo2.Controllers
{
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");
}
}
}
{
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 EPPlusMvcDemo2.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>
原文:https://www.cnblogs.com/caofangsheng/p/6149843.html
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