MeterVision_v2/MeterVision/Station/UCVpsGrid.xaml.cs

using MeterVision.Config;
using MeterVision.db;
using MeterVision.model;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace MeterVision.Station
{
    /// <summary>
    /// UCVpsGrid.xaml 的交互逻辑
    /// </summary>
    public partial class UCVpsGrid : UserControl, INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        protected void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        public ObservableCollection<VPatchStation> StationItemList { get; set; }

        public event Action<VPatchStation> OnItemChanged;

        private VPatchStation _selectedItem;

        public VPatchStation SelectedItem
        {
            get => _selectedItem;
            set
            {
                if(_selectedItem != value)
                {
                    _selectedItem = value;
                    OnPropertyChanged(nameof(SelectedItem));
                    OnItemChanged?.Invoke(value);
                }
            }
        }


        //要查找的站点ID
        private string _findStationId;
        public string FindStationId
        {
            get => _findStationId;
            private set
            {
                if (_findStationId != value)
                {
                    _findStationId = value;
                }
            }
        }

        private string _patchId;
        public string PatchId
        {
            get => _patchId;
            private set
            {
                if (_patchId != value)
                {
                    _patchId = value;
                }
            }
        }

        public void ChangeFind(string stationId, string patchId)
        {
            bool blChangeFindStationId = false;
            bool blChangePatchId = false;

            if (stationId != _findStationId)
            {
                FindStationId = stationId;
                blChangeFindStationId = true;
            }

            if (patchId != _patchId)
            {
                PatchId = patchId;
                blChangePatchId = true;
            }


            if (blChangeFindStationId || blChangePatchId)
            {
                StationPage.InitDefaulValue();
                LoadStationItemList(true);
            }
        }

        public CfginiItem mConfigItem { get; set; }

        public PageModel StationPage { get; set; }

        private int _totalRecords;
        public int TotalRecords
        {
            get => _totalRecords;
            set
            {
                if (_totalRecords != value)
                {
                    _totalRecords = value;
                    OnPropertyChanged(nameof(TotalRecords));
                }
            }
        }



        public UCVpsGrid()
        {
            InitializeComponent();
            StationItemList = new ObservableCollection<VPatchStation>();
            dgStation.ItemsSource = StationItemList;

            mConfigItem = CfginiItem.GetConfigItem();

            StationPage = new PageModel
            {
                PageSize = mConfigItem.PatchPageSize,
                PageNumber = 1
            };

            mConfigItem.OnPatchPageSizeChanged += MConfigItem_OnPatchPageSizeChanged;

            this.DataContext = this;
        }
        private void MConfigItem_OnPatchPageSizeChanged(int pageSize)
        {
            StationPage.InitDefaulValue(pageSize);
            LoadStationItemList(true);
        }

        private async void LoadStationItemList(bool scrollTop)
        {
            StationItemList.Clear();

            if (FindStationId == null)
            {
                return;
            }

            try
            {
                var result = await Task.Run(() =>
                {
                    return DBPatch.GetPagedPatchStations(StationPage.PageNumber, StationPage.PageSize,PatchId);
                });

                //更新分页信息
                TotalRecords = result.Item1;
                StationPage.PageCount = result.Item2;
                List<VPatchStation> stationList = result.Item3;

                //在主线中更新数据
                Application.Current.Dispatcher.Invoke(() =>
                {
                    int index = 0;
                    foreach (VPatchStation station in stationList)
                    {
                        index++;
                        //StationItem item = new StationItem(station);
                        //item.Index = index + ((StationPage.PageNumber - 1) * StationPage.PageSize);
                        //StationItemList.Add(item);
                        station.Index = index + ((StationPage.PageNumber - 1) * StationPage.PageSize);
                    }

                    SelectedItem = null;
                    if (StationItemList.Count > 0 && scrollTop)
                    {
                        dgStation.ScrollIntoView(dgStation.Items[0]);
                    }
                });
            }
            catch (Exception ex)
            {
                MessageBox.Show(Application.Current.MainWindow,
                    $"加载数据是发生错误：{ex.Message}", "错误",
                    MessageBoxButton.OK, MessageBoxImage.Error);
            }
            SelectedItem = null;
        }


        public void NextPage()
        {
            if (StationPage.PageNumber < StationPage.PageCount)
            {
                StationPage.PageNumber += 1;
                LoadStationItemList(true);
            }
        }

        public void PrePage()
        {
            if (StationPage.PageNumber > 1)
            {
                StationPage.PageNumber -= 1;
                LoadStationItemList(true);
            }
        }

        public void FirstPage()
        {
            if (StationPage.PageNumber > 1)
            {
                StationPage.PageNumber = 1;
                LoadStationItemList(true);
            }
        }

        public void LastPage()
        {
            if (StationPage.PageNumber < StationPage.PageCount)
            {
                StationPage.PageNumber = StationPage.PageCount;
                LoadStationItemList(true);
            }
        }

        public void SpeciPage(int pageNumber)
        {
            if (pageNumber != StationPage.PageNumber &&
                pageNumber > 0 && pageNumber <= StationPage.PageCount)
            {
                StationPage.PageNumber = pageNumber;
                LoadStationItemList(true);
            }
        }

        //---------------------------------------------------------------------
    }
}