84 lines
2.1 KiB
C#
84 lines
2.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Linq;
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using BathHouseManagmet.Database;
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using BathHouseManagmet.Models;
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using CommunityToolkit.Mvvm.ComponentModel;
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using CommunityToolkit.Mvvm.Input;
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using Microsoft.Extensions.DependencyInjection;
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namespace BathHouseManagmet.ViewModels;
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public partial class DiscountViewModel : ViewModelBase
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{
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private readonly IServiceProvider _serviceProvider;
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[ObservableProperty] List<Discount> _discounts;
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[ObservableProperty] int _currentPageSize;
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[ObservableProperty] List<int> _pageSizes;
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[ObservableProperty] string _pageInfo;
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private int totalPages;
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private int currentPage = 0;
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public DiscountViewModel(IServiceProvider serviceProvider)
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{
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_serviceProvider = serviceProvider;
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using (var rep = serviceProvider.GetRequiredService<DiscountRepository>())
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Discounts = new List<Discount>(rep.GetPage());
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PageSizes = new List<int>([5, 10, 15]);
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CurrentPageSize = PageSizes.First();
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}
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partial void OnCurrentPageSizeChanged(int value)
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{
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CalculatePage();
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}
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void CalculatePage()
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{
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using var db = new DiscountRepository();
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var rowsCount = db.GetRowsCount();
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totalPages = (int)Math.Ceiling(((double)rowsCount / CurrentPageSize));
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ShowFirstPage();
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}
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void ShowPage(int pageIndex)
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{
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currentPage = pageIndex;
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using var db = new DiscountRepository();
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Discounts.Clear();
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var rows = db.GetPage(pageIndex, CurrentPageSize);
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rows.ForEach(d => Discounts.Add(d));
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PageInfo = $"Страница {currentPage + 1} из {totalPages}";
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}
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[RelayCommand]
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private void ShowFirstPage()
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{
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ShowPage(0);
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}
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[RelayCommand]
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private void ShowLastPage()
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{
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ShowPage(totalPages - 1);
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}
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[RelayCommand]
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private void ShowNextPage()
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{
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if (currentPage < totalPages - 1)
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ShowPage(currentPage + 1);
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}
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[RelayCommand]
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private void ShowPreviousPage()
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{
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if (currentPage > 0)
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ShowPage(currentPage - 1);
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}
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} |