61 lines
2.3 KiB
C#
61 lines
2.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using OfficeOpenXml;
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namespace Yi.Framework.Common.Helper
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{
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public class ExcelHelper
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{
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/// <summary>
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///
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="dataList">数据</param>
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/// <param name="headers">表头</param>
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/// <returns></returns>
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public static string CreateExcelFromList<T>(List<T> dataList, List<string> headers,string evn)
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{
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ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
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string sWebRootFolder = Path.Combine($"{evn}", "wwwroot/Excel");//如果用浏览器url下载的方式 存放excel的文件夹一定要建在网站首页的同级目录下！！！
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if (!Directory.Exists(sWebRootFolder))
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{
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Directory.CreateDirectory(sWebRootFolder);
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}
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string sFileName = $@"Excel_{DateTime.Now.ToString("yyyyMMddHHmmss")}.xlsx";
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var path = Path.Combine(sWebRootFolder, sFileName);
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FileInfo file = new FileInfo(path);
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if (file.Exists)
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{
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file.Delete();
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file = new FileInfo(path);
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}
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using (ExcelPackage package = new(file))
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{
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//创建sheet
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ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("sheet1");
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worksheet.Cells.LoadFromCollection(dataList, true);
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//表头字段
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for (int i = 0; i < headers.Count; i++)
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{
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worksheet.Cells[1, i + 1].Value = headers[i];
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}
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for (int i = 0; i < headers.Count + 1; i++)
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{//删除不需要的列
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string aa = worksheet.Cells[1, i + 1].Value.ToString();
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if (aa == "总行数")
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{
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worksheet.DeleteColumn(i + 1);
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}
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}
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package.Save();
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}
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//return path;//这是返回文件的方式
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return sFileName; //如果用浏览器url下载的方式 这里直接返回生成的文件名就可以了
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}
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}
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}
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