ds8-solution-pro/ds-wms-service/DS.Module.ExcelModule/ExcelService.cs

using DS.Module.Core;
using DS.Module.ExcelModule.Model;
using LanguageExt.ClassInstances;
using LanguageExt;
using Microsoft.AspNet.SignalR.Hubs;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.DependencyInjection;
using MiniExcelLibs;
using Newtonsoft.Json.Linq;
using SqlSugar;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using OfficeOpenXml;
using NPOI.Util;
using NPOI.SS.UserModel;
using NPOI.HPSF;

namespace DS.Module.ExcelModule
{
    public class ExcelService : IExcelService
    {
        private readonly IServiceProvider _serviceProvider;
        private readonly ISqlSugarClient db;

        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="serviceProvider"></param>
        public ExcelService(IServiceProvider serviceProvider)
        {
            _serviceProvider = serviceProvider;
            db = _serviceProvider.GetRequiredService<ISqlSugarClient>();

        }
        public DataResult<string> ExportExcelByColumn(ExportByColumnReq req)
        {
            var filename = Guid.NewGuid() + ".xlsx";
            //var path = Path.Combine(_environment.WebRootPath, "export/" + filename);
            var path = Path.Combine("", "wwwroot/export/" + filename);
            var data = JArray.Parse(req.JsonDataStr);

            var values = new List<Dictionary<string, object>>();

            for (int i = 0; i < data.Count; i++)
            {
                var temp = data[i];
                var info = new Dictionary<string, object>();
                for (int n = 0; n < req.ColumnSets.Count; n++)
                {
                    var columnSet = req.ColumnSets[n];
                    var key = columnSet.DataIndex; 
                    info.Add(columnSet.Title, temp[key]);
                }
                values.Add(info);
            }
            MiniExcel.SaveAs(path, values);
            return DataResult<string>.Success(path);
        }


        public MemoryStream ExportExcelStreamByColumn(ExportByColumnReq req)
        {

            //var filename = Guid.NewGuid() + ".xlsx";
            //var path = Path.Combine(_environment.WebRootPath, "export/" + filename);
            //var path = Path.Combine("", "wwwroot/export/" + filename);
            var data = JArray.Parse(req.JsonDataStr);

            var values = new List<Dictionary<string, object>>();

            for (int i = 0; i < data.Count; i++)
            {
                var temp = data[i];
                var info = new Dictionary<string, object>();
                for (int n = 0; n < req.ColumnSets.Count; n++)
                {
                    var columnSet = req.ColumnSets[n];
                    var key = columnSet.DataIndex;
                    info.Add(columnSet.Title, temp[key]);
                }
                values.Add(info);
            }
            var stream = new MemoryStream();
            MiniExcel.SaveAs(stream, values);
            stream.Seek(0, SeekOrigin.Begin);
            return stream;

            //var data = JArray.Parse(req.JsonDataStr);

            //ExcelPackage.LicenseContext = LicenseContext.NonCommercial; // 设置许可
            //var stream = new MemoryStream();
            //using (var package = new ExcelPackage(stream))
            //{
            //    var worksheet = package.Workbook.Worksheets.Add("Sheet1");
            //    // 填充数据
            //    //worksheet.Cells[1, 1].Value = "Column1";
            //    //worksheet.Cells[1, 2].Value = "Column2";
            //    //worksheet.Cells[2, 1].Value = "Data1";
            //    //worksheet.Cells[2, 2].Value = "Data2";

            //    if (data != null && req.ColumnSets != null) 
            //    {
            //        var _count = 1;
            //        foreach (var title in req.ColumnSets) { 
            //            worksheet.Cells[1, _count].Value = title.Title;
            //            _count++;
            //        }

            //        for (int i = 0; i < data.Count; i++)
            //        {
            //            var temp = data[i];
            //            for (int n = 0; n < req.ColumnSets.Count; n++)
            //            {
            //                var columnSet = req.ColumnSets[n];
            //                var key = columnSet.DataIndex;
            //                worksheet.Cells[i+2, n+1].Value = temp[key].ToString();
            //            }

            //        }
            //    }

            //    // 保存
            //    package.Save();
            //}


            ////using (var fileStream = File.Create("D:\\temp.xlsx"))
            ////{
            ////    stream.Seek(0, SeekOrigin.Begin);//设置复制开始的地方
            ////    stream.CopyTo(fileStream);
            ////}

            //stream.Seek(0, SeekOrigin.Begin);

            //stream.Position = 0;

            //return stream;

        }

    }
}