!提交代码
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hehaibing-1996
201
货架标准上位机/ViewModels/DataListViewModel.cs
Normal file
201
货架标准上位机/ViewModels/DataListViewModel.cs
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using HandyControl.Controls;
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using MiniExcelLibs;
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using Ping9719.WpfEx.Mvvm;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Runtime.CompilerServices;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Windows.Input;
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using System.Windows.Media;
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using SqlSugar;
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using HandyControl.Data;
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using System.Windows;
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namespace 货架标准上位机.ViewModel
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{
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public class DataListViewModel : BindableBase
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{
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private List<MyTestTable> dataList = new List<MyTestTable>();
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/// <summary>
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/// 列表数据
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/// </summary>
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public List<MyTestTable> DataList { get => dataList; set { SetProperty(ref dataList, value); } }
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#region 进度
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private bool IsLoad_;
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public bool IsLoad { get => IsLoad_; set { SetProperty(ref IsLoad_, value); } }
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#endregion
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#region 筛选
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private DateTime? timeGo = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day);
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/// <summary>
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/// 开始时间（默认只显示今天开始的数据）
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/// </summary>
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public DateTime? TimeGo { get => timeGo; set { SetProperty(ref timeGo, value); } }
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private DateTime? timeTo;
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/// <summary>
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/// 结束时间
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/// </summary>
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public DateTime? TimeTo { get => timeTo; set { SetProperty(ref timeTo, value); } }
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private string info1;
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public string Info1 { get => info1; set { SetProperty(ref info1, value); } }
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private string info2;
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public string Info2 { get => info2; set { SetProperty(ref info2, value); } }
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#endregion
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#region 页码
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private int maxPageCount;
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/// <summary>
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/// 最大页数
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/// </summary>
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public int MaxPageCount { get => maxPageCount; set { SetProperty(ref maxPageCount, value); } }
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private int pageIndex = 1;
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/// <summary>
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/// 当前页
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/// </summary>
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public int PageIndex { get => pageIndex; set { SetProperty(ref pageIndex, value); } }
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private int dataCountPerPage = 20;
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/// <summary>
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/// 每页的数据量
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/// </summary>
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public int DataCountPerPage { get => dataCountPerPage; set { SetProperty(ref dataCountPerPage, value); } }
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public ICommand PageUpdateCommand { get => new DelegateCommand<FunctionEventArgs<int>>(PageUpdate); }
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/// <summary>
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/// 页码更新
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/// </summary>
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public void PageUpdate(FunctionEventArgs<int> page)
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{
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PageIndex = page.Info;
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UpdateList();
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}
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#endregion
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public ICommand ExportExcelCommand { get => new DelegateCommand(ExportExcel); }
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/// <summary>
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/// 导出为excel
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/// </summary>
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public async void ExportExcel()
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{
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if (IsLoad)
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{
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Growl.Info("有任务正在进行，请稍等片刻。");
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return;
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}
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IsLoad = true;
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Microsoft.Win32.SaveFileDialog sfd = new Microsoft.Win32.SaveFileDialog();
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sfd.Filter = ".xlsx文件(*.xlsx)|*.xlsx";
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sfd.FileName = "XXXX记录信息";
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sfd.OverwritePrompt = true;
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if (sfd.ShowDialog() != true)
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{
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IsLoad = false;
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return;
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}
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string path = sfd.FileName;
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try
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{
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//1.查询数据库，加入筛选条件，并按照时间倒序排序，并导出指定列
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var dbData = DataDb.db.Queryable<MyTestTable>()
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.WhereIF(TimeGo != null, o => o.Time > TimeGo)
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.WhereIF(TimeTo != null, o => o.Time < TimeTo)
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.WhereIF(!string.IsNullOrWhiteSpace(Info1), o => o.Info1.StartsWith(Info1.Trim()))
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.WhereIF(!string.IsNullOrWhiteSpace(Info2), o => o.Info2.StartsWith(Info2.Trim()))
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.OrderByDescending(o => o.Id)
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.Select(o => new
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{
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产品信息1 = o.Info1,
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产品信息2 = o.Info2,
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状态结果 = o.Status,
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创建时间 = o.Time.ToString("yyyy-MM-dd HH:mm:ss"),
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});
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//2.导出为Excel，使用内存缓存的方式，防止数据量过大导致内存泄露
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var sqlkv = dbData.ToSql();
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var dataReader = await DataDb.db.Ado.GetDataReaderAsync(sqlkv.Key, sqlkv.Value);
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await MiniExcel.SaveAsAsync(path, dataReader, overwriteFile: true);
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dataReader.Close();
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Growl.Success("导出成功。");
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}
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catch (Exception ex)
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{
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Growl.Error("导出失败：" + ex.Message);
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}
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finally
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{
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IsLoad = false;
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}
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}
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public ICommand UpdateListCommand { get => new DelegateCommand(UpdateList); }
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/// <summary>
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/// 更新信息
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/// </summary>
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public async void UpdateList()
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{
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if (IsLoad)
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{
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Growl.Info("有任务正在进行，请稍等片刻。");
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return;
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}
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IsLoad = true;
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try
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{
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await Task.Delay(200);
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//1.查询数据库，加入筛选条件，并按照时间倒序排序
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var dbData = DataDb.db.Queryable<MyTestTable>()
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.WhereIF(TimeGo != null, o => o.Time > TimeGo)
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.WhereIF(TimeTo != null, o => o.Time < TimeTo)
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.WhereIF(!string.IsNullOrWhiteSpace(Info1), o => o.Info1.StartsWith(Info1.Trim()))
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.WhereIF(!string.IsNullOrWhiteSpace(Info2), o => o.Info2.StartsWith(Info2.Trim()))
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.OrderByDescending(o => o.Id);
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//2.开始分页（如模型不一样使用‘.Select<Model>()’来转换）
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RefAsync<int> totalNumber = 0;
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RefAsync<int> totalPage = 0;
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DataList = await dbData.ToPageListAsync(PageIndex, DataCountPerPage, totalNumber, totalPage);
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MaxPageCount = totalPage.Value;
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}
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catch (Exception ex)
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{
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Growl.Error("加载数据失败：" + ex.Message);
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}
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finally
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{
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IsLoad = false;
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}
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}
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public ICommand SeeCommand { get => new DelegateCommand<MyTestTable>(See); }
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/// <summary>
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/// 查看详情
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/// </summary>
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public void See(MyTestTable obj)
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{
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if (IsLoad)
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{
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Growl.Info("有任务正在进行，请稍等片刻。");
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return;
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}
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Growl.Info("信息：" + Newtonsoft.Json.JsonConvert.SerializeObject(obj));
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}
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}
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}
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