TeamAAS-VP-HeShuo/TeamAAS-VM/ViewModels/Statistics/AlarmQueryViewModel.cs

using Prism.Commands;
using Prism.Ioc;
using Prism.Mvvm;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Data;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using TeamAAS_VM.Data;
using TeamAAS_VP.Core;
using TeamAAS_VP.Data;
using TeamAAS_VP.Models;
using TeamAAS_VP.Views.Product;

namespace TeamAAS_VP.ViewModels.Statistics
{
    public class AlarmQueryViewModel : BindableBase
    {
        IContainerProvider _container;
        #region 属性
        private DataTable _dataTable;
        public DataTable DataTable
        {
            get { return _dataTable; }
            set { SetProperty(ref _dataTable, value); }
        }

        private DateTime? _StartDate;

        public DateTime? StartDate
        {
            get { return _StartDate; }
            set { SetProperty(ref _StartDate, value); }
        }

        private DateTime? _StartTime;

        public DateTime? StartTime
        {
            get { return _StartTime; }
            set { SetProperty(ref _StartTime, value); }
        }

        private DateTime? _EndDate;

        public DateTime? EndDate
        {
            get { return _EndDate; }
            set { SetProperty(ref _EndDate, value); }
        }

        private DateTime? _EndTime;

        public DateTime? EndTime
        {
            get { return _EndTime; }
            set { SetProperty(ref _EndTime, value); }
        }

        private bool _isSearch = false;

        public bool isSearch
        {
            get { return _isSearch; }
            set { SetProperty(ref _isSearch, value); }
        }
        #endregion

        #region 命令
        private DelegateCommand _LoadedCommand;
        public DelegateCommand LoadedCommand =>
            _LoadedCommand ?? (_LoadedCommand = new DelegateCommand(ExecuteLoadedCommand));

        private DelegateCommand _SearchCommand;
        public DelegateCommand SearchCommand =>
            _SearchCommand ?? (_SearchCommand = new DelegateCommand(ExecuteSearchCommand, CanSearch)
            .ObservesProperty(() => StartDate).ObservesProperty(() => StartTime)
            .ObservesProperty(() => EndDate).ObservesProperty(() => EndTime).ObservesProperty(() => isSearch));

        private DelegateCommand _SaveCommand;
        public DelegateCommand SaveCommand =>
            _SaveCommand ?? (_SaveCommand = new DelegateCommand(ExecuteSaveCommand, CanSave).ObservesProperty(() => DataTable).ObservesProperty(() => isSearch));


        #endregion

        #region 事件

        #endregion

        public AlarmQueryViewModel(IContainerProvider container)
        {
            _container = container;
        }

        #region 方法
        void ExecuteLoadedCommand()
        {
            if (StartDate == null)
            {
                StartDate = DateTime.Now;
            }
            if (StartTime == null)
            {
                StartTime = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, 0, 0, 0);
            }
            if (EndDate == null)
            {
                EndDate = DateTime.Now;
            }
            if (EndTime == null)
            {
                EndTime = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, 23, 59, 59);
            }
        }

        /// <summary>
        /// 查询
        /// </summary>
        async void ExecuteSearchCommand()
        {

            DateTime dt1 = new DateTime(StartDate.Value.Year, StartDate.Value.Month, StartDate.Value.Day, StartTime.Value.Hour, StartTime.Value.Minute, StartTime.Value.Second);
            DateTime dt2 = new DateTime(EndDate.Value.Year, EndDate.Value.Month, EndDate.Value.Day, EndTime.Value.Hour, EndTime.Value.Minute, EndTime.Value.Second);
            isSearch = true;
            DataTable = await DatabaseHelper.GetAlarmRecords(dt1, dt2);
            isSearch = false;
        }

        /// <summary>
        /// 保存
        /// </summary>
        async void ExecuteSaveCommand()
        {
            isSearch = true;
            try
            {
                //打开一个保存对话框，选择保存路径
                //将DataTable报错到本地路径中，保存的文件名为“产品名称_开始时间_结束时间.csv”

                string startTime = " "; //开始时间
                string endTime = " "; //结束时间
                if (StartDate != null)
                {
                    startTime = StartDate.Value.ToString("yyyyMMddHHmm");
                }
                if (EndDate != null)
                {
                    endTime = EndDate.Value.ToString("yyyyMMddHHmm");
                }
                string fileName = $"Alarm_{startTime}_{endTime}.csv";
                //打开一个保存对话框，选择保存路径
                var saveFileDialog = new Microsoft.Win32.SaveFileDialog
                {
                    FileName = fileName,
                    DefaultExt = ".csv",
                    Filter = "CSV Files (*.csv)|*.csv"
                };
                bool? result = saveFileDialog.ShowDialog();
                if (result == true)
                {
                    //保存文件
                    string filePath = saveFileDialog.FileName;

                    //将DataTable导出到csv文件中
                    if (filePath == null) return;
                    DataTableHelper.ExportToCsv(DataTable, filePath);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "错误", MessageBoxButton.OK, MessageBoxImage.Error);
            }
            isSearch = false;
        }

        private bool CanSearch()
        {
            if (StartDate != null && StartTime != null && EndDate != null && EndTime != null && !isSearch)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        private bool CanSave()
        {
            if (DataTable != null && DataTable.Rows.Count > 0 && !isSearch)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        #endregion
    }
}