ASP.NET Core 导入导出Excel.xlsx文件实例
ASP.NET Core 使用EPPlus.Core导入导出Excel.xlsx 文件，EPPlus.Core支持Excel 2007/2010 .xlsx文件导入导出，可以运行在Windows, Linux和Mac。
EPPlus.Core 是基于EPPlus 更改而来，在Linux 下需要安装libgdiplus 。
EPPlus：http://epplus.codeplex.com/
EPPlus.Core：https://github.com/VahidN/EPPlus.Core
下面在ASP.NET Core 中导入导出Excel xlsx 文件。（参考：https://www.jb51.net/article/100509.htm）
1.新建项目=> WebAppTest
2.导入NuGet包：EPPlus.Core
3.新建控制器：XlsxController，代码如下：
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Common.Helper;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using OfficeOpenXml;
namespace WebAppTest.Controllers
{
public class XlsxController : Controller
{
///
/// 通过依赖注入获取HostingEnvironment，对应可以获取程序的相关目录及属性。
///
private IHostingEnvironment _hostingEnvironment;
public XlsxController(IHostingEnvironment hostingEnvironment)
{
_hostingEnvironment = hostingEnvironment;
}
public IActionResult Index()
{
return View();
}
///
/// 公用路径
///
/// GetTuple()
{
//string sWebRootFolder = _hostingEnvironment.WebRootPath + @"\execl";
string sWebRootFolder = _hostingEnvironment.WebRootPath;
string sFileName = $"{DateTime.Now.ToString("yyyyMMddHHmmssfff")}-{Guid.NewGuid()}.xlsx";
return Tuple.Create(sWebRootFolder, sFileName);
}
#region 封装前-导出、导入Excel.xlsx文件
// 导出xlsx文件
public IActionResult Export()
{
string sWebRootFolder = GetTuple().Item1;
string sFileName = GetTuple().Item2;
FileInfo file = new FileInfo(Path.Combine(sWebRootFolder, sFileName));
using (ExcelPackage package = new ExcelPackage(file))
{
// 添加worksheet
ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("aspnetcore");
//添加头
worksheet.Cells[1, 1].Value = "ID";
worksheet.Cells[1, 2].Value = "Name";
worksheet.Cells[1, 3].Value = "Url";
//添加值
worksheet.Cells["A2"].Value = 1000;
worksheet.Cells["B2"].Value = "LineZero";
worksheet.Cells["C2"].Value = "http://www.cnblogs.com/linezero/";
worksheet.Cells["A3"].Value = 1001;
worksheet.Cells["B3"].Value = "LineZero GitHub";
worksheet.Cells["C3"].Value = "https://github.com/linezero";
worksheet.Cells["C3"].Style.Font.Bold = true;
package.Save();
}
return File(sFileName, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
}
[HttpPost]
public IActionResult Import(IFormFile excelfile)
{
string sWebRootFolder = GetTuple().Item1;
string sFileName = GetTuple().Item2;
FileInfo file = new FileInfo(Path.Combine(sWebRootFolder, sFileName));
try
{
using (FileStream fs = new FileStream(file.ToString(), FileMode.Create))
{
excelfile.CopyTo(fs);
fs.Flush();
}
using (ExcelPackage package = new ExcelPackage(file))
{
StringBuilder sb = new StringBuilder();
ExcelWorksheet worksheet = package.Workbook.Worksheets[1];
int rowCount = worksheet.Dimension.Rows;
int ColCount = worksheet.Dimension.Columns;
bool bHeaderRow = true;
for (int row = 1; row <= rowCount; row++)
{
for (int col = 1; col <= ColCount; col++)
{
if (bHeaderRow)
sb.Append(worksheet.Cells[row, col].Value.ToString() + "\t");
else
sb.Append(worksheet.Cells[row, col].Value.ToString() + "\t");
}
sb.Append(Environment.NewLine);
}
return Content(sb.ToString());
}
}
catch (Exception ex)
{
return Content(ex.Message);
}
}
#endregion
#region 封装后-导出、导入Excel.xlsx文件
public IActionResult Export2()
{
string dt1 = DateTime.Now.ToString("yyyy-MM-dd/HH:mm:ss.fff");
string path = GetTuple().Item1;
ExcelHelper.Export(GetDic(), path, out Tuple t);
string dt2 = DateTime.Now.ToString("yyyy-MM-dd/HH:mm:ss.fff");
//return Json(new {
// msg = "ok",
// data = $"开始时间：{dt1},结束时间：{dt2}"
//});
return File(t.Item1, t.Item2);
}
private Dictionary GetDic()
{
DataTable dt = new DataTable("cart");
DataColumn dc1 = new DataColumn("prizename", Type.GetType("System.String"));
DataColumn dc2 = new DataColumn("point", Type.GetType("System.Int16"));
DataColumn dc3 = new DataColumn("number", Type.GetType("System.Int16"));
DataColumn dc4 = new DataColumn("totalpoint", Type.GetType("System.Int64"));
DataColumn dc5 = new DataColumn("prizeid", Type.GetType("System.String"));
dt.Columns.Add(dc1);
dt.Columns.Add(dc2);
dt.Columns.Add(dc3);
dt.Columns.Add(dc4);
dt.Columns.Add(dc5);
//以上代码完成了DataTable的构架，但是里面是没有任何数据的
for (int i = 0; i <= 100000; i++)
{
DataRow dr = dt.NewRow();
dr["prizename"] = $"娃娃{i}";
dr["point"] = 10;
dr["number"] = 1;
dr["totalpoint"] = 10;
dr["prizeid"] = $"t00{i}";
dt.Rows.Add(dr);
}
//填充了100000条相同的记录进去
var dic = new Dictionary();
for (int i = 0; i <= 10; i++)
{
dic.Add($"{dt.TableName}-{i}", dt);
}
return dic;
}
[HttpPost]
public IActionResult Import2(IFormFile excelFile)
{
string sWebRootFolder = GetTuple().Item1;
try
{
ExcelHelper.Import(excelFile, sWebRootFolder, out string content);
return Content(content);
}
catch (Exception ex)
{
return Content(ex.Message);
}
}
#endregion
}
} @{
Layout = null;
}
ASP.NET Core 导入导出Excel.xlsx 文件
ASP.NET Core 导入导出Excel.xlsx 文件
5.封装后的ExcelHelper.cs代码如下：
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Text;
using Microsoft.AspNetCore.Http; //IFormFile
using OfficeOpenXml;
namespace Common.Helper
{
///
/// Excel导入导出助手
/// NuGet：EPPlus.Core
///
public sealed class ExcelHelper
{
//参考：https://www.jb51.net/article/100509.htm
private ExcelHelper() { }
///
/// Excel文件 Content-Type
///
private const string Excel = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
///
/// Excel导出
///
/// 字典表【名称，数据】
/// 网站根文件夹
/// item1:The virtual path of the file to be returned.|item2:The Content-Type of the file
public static void Export(Dictionary keyValuePairs,string sWebRootFolder,out Tuple tuple)
{
if (string.IsNullOrWhiteSpace(sWebRootFolder))
tuple = Tuple.Create("", Excel);
string sFileName = $"{DateTime.Now.ToString("yyyyMMddHHmmssfff")}-{FormatGuid.GetGuid(FormatGuid.GuidType.N)}.xlsx";
FileInfo file = new FileInfo(Path.Combine(sWebRootFolder, sFileName));
using (ExcelPackage package = new ExcelPackage(file))
{
foreach (var item in keyValuePairs)
{
string worksheetTitle = item.Key; //表名称
var dt = item.Value; //数据表
// 添加worksheet
ExcelWorksheet worksheet = package.Workbook.Worksheets.Add(worksheetTitle);
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
if (i==0)
{
//添加表头
worksheet.Cells[1, j+1].Value = dt.Columns[j].ColumnName;
worksheet.Cells[1, j+1].Style.Font.Bold = true;
}
else
{
//添加值
worksheet.Cells[i+1,j+1].Value = dt.Rows[i][j].ToString();
}
}
}
}
package.Save();
}
tuple = Tuple.Create(sFileName, Excel);
}
///
/// Excel导入
///
/// Excel文件
/// 文件存储路径
/// 显示内容
/// 是否显示内容
public static void Import(IFormFile excelFile,string sWebRootFolder,out string content, bool isShow = false)
{
if (string.IsNullOrWhiteSpace(sWebRootFolder))
content = string.Empty;
string sFileName = $"{DateTime.Now.ToString("yyyyMMddHHmmssfff")}-{FormatGuid.GetGuid(FormatGuid.GuidType.N)}.xlsx";
FileInfo file = new FileInfo(Path.Combine(sWebRootFolder, sFileName));
using (FileStream fs = new FileStream(file.ToString(), FileMode.Create))
{
excelFile.CopyToAsync(fs);
fs.Flush();
}
if (isShow)
{
//导出单个工作表sheet
using (ExcelPackage package = new ExcelPackage(file))
{
StringBuilder sb = new StringBuilder();
ExcelWorksheet worksheet = package.Workbook.Worksheets[1];
int rowCount = worksheet.Dimension.Rows;
int colCount = worksheet.Dimension.Columns;
bool bHeaderRow = true;
for (int row = 1; row <= rowCount; row++)
{
for (int col = 1; col <= colCount; col++)
{
if (bHeaderRow)
sb.Append(worksheet.Cells[row, col].Value.ToString() + "\t");
else
sb.Append(worksheet.Cells[row, col].Value.ToString() + "\t");
}
sb.Append(Environment.NewLine);
}
content = sb.ToString();
}
}
else
{
content = string.Empty;
}
}
}
} 注：同上NuGet包导入：EPPlus.Core；
视图界面显示如下图所示：
上面代码中模拟了10w行 X 10张表的数据，导出如下：
