93 lines
3.6 KiB
C#
93 lines
3.6 KiB
C#
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using System;
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using System.IO;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Hosting;
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using OfficeOpenXml;
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using WebApi_data_value.Models;
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using Microsoft.EntityFrameworkCore;
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namespace Parking_space_WebAPI.Services
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{
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public class ExcelGenerationService : BackgroundService
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{
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private readonly IServiceProvider _serviceProvider;
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private readonly string _saveDirectory = @"C:\Users\ste92\Desktop\parking-e\excel"; // 指定儲存 Excel 的資料夾
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public ExcelGenerationService(IServiceProvider serviceProvider)
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{
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_serviceProvider = serviceProvider;
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}
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protected override async Task ExecuteAsync(CancellationToken stoppingToken)
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{
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while (!stoppingToken.IsCancellationRequested)
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{
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await GenerateAndSaveExcel();
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await Task.Delay(TimeSpan.FromHours(1), stoppingToken); // 每小時執行一次
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//await Task.Delay(TimeSpan.FromMinutes(2), stoppingToken); // 每 2 分鐘執行一次
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}
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}
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private async Task GenerateAndSaveExcel()
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{
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using (var scope = _serviceProvider.CreateScope())
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{
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var _context = scope.ServiceProvider.GetRequiredService<SqlContext>();
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// 從資料庫讀取數據
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var parkingSpaces = await _context.yuntech_parking.ToListAsync();
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var monthlyRent = await _context.yuntech_monthly_rent_number
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.FirstOrDefaultAsync(x => x.category == "月租");
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var temporaryParking = await _context.yuntech_monthly_rent_number
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.FirstOrDefaultAsync(x => x.category == "臨停");
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if (parkingSpaces != null && monthlyRent != null && temporaryParking != null)
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{
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// 生成 Excel 文件
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var fileBytes = GenerateExcel(parkingSpaces, monthlyRent, temporaryParking);
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// 文件名帶上當前時間
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var fileName = $"ParkingSpaces_{DateTime.Now:yyyyMMddHHmmss}.xlsx";
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var filePath = Path.Combine(_saveDirectory, fileName);
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// 保存文件
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await File.WriteAllBytesAsync(filePath, fileBytes);
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}
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}
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}
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private byte[] GenerateExcel(IEnumerable<Yuntech_parking> parkingData, Yuntech_monthly_rent_number monthlyRent, Yuntech_monthly_rent_number temporaryParking)
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{
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using var package = new ExcelPackage();
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var worksheet = package.Workbook.Worksheets.Add("Yuntech Parking");
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// 設定標題
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worksheet.Cells[1, 1].Value = "總車位";
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worksheet.Cells[1, 2].Value = "剩餘車位";
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worksheet.Cells[1, 3].Value = "月租車數量";
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worksheet.Cells[1, 4].Value = "臨停數量";
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// 添加下載時間
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worksheet.Cells[1, 6].Value = "下載時間";
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worksheet.Cells[2, 6].Value = DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss");
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var row = 2;
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foreach (var item in parkingData)
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{
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worksheet.Cells[row, 1].Value = item.all_num;
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worksheet.Cells[row, 2].Value = item.now_num;
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row++;
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}
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// 添加月租車與臨停車數據
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worksheet.Cells[2, 3].Value = monthlyRent.number;
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worksheet.Cells[2, 4].Value = temporaryParking.number;
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return package.GetAsByteArray();
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}
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}
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}
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