XiChang/DM_Weight/ViewModels/ReturnEmptyWindowViewModel.cs

using Prism.Commands;
using Prism.Mvvm;
using Prism.Regions;
using Prism.Services.Dialogs;
using SqlSugar;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using DM_Weight.Models;
using DM_Weight.util;
using DM_Weight.Common;
using System.Configuration;

namespace DM_Weight.ViewModels
{
    public class ReturnEmptyWindowViewModel : BindableBase, IConfirmNavigationRequest, IRegionMemberLifetime
    {

       

        private List<ChannelStock>? _channelStocks;

        public List<ChannelStock>? Channels
        {
            get { return _channelStocks; }
            set { SetProperty(ref _channelStocks, value); }
        }

        private ChannelStock _channelStock;

        public ChannelStock Channel
        {
            get { return _channelStock; }
            set { SetProperty(ref _channelStock, value); }
        }

        IDialogService _dialogService;
        public ReturnEmptyWindowViewModel(IDialogService dialogService)
        {
            _dialogService = dialogService;
        }

        public DelegateCommand RowSelected
        {
            get => new DelegateCommand(() =>
            {
                
                if (Channel != null && Channel.DrugId == null)
                {
                    DialogParameters dialogParameters = new DialogParameters();
                    dialogParameters.Add("DrawerNo", Channel.DrawerNo);
                    DialogServiceExtensions.ShowDialogHost(_dialogService, "BindingChannelDialog", dialogParameters, DoDialogResult, "RootDialog");
                }
                else if(Channel != null && Channel.CanReturnQuantity > 0)
                {
                    DialogParameters dialogParameters = new DialogParameters();
                    dialogParameters.Add("channel", Channel);
                    DialogServiceExtensions.ShowDialogHost(_dialogService, "ReturnEmptyDialog", dialogParameters, DoDialogResult, "RootDialog");
                }
            });
        }


        private void DoDialogResult(IDialogResult dialogResult)
        {
            // 委托   被动执行     被子窗口执行
            // dialogResult  第一方面可以拿到任意参数   第二方面   可判断关闭状态
            RequestData();
            //MessageBox.Show("返回值：" + dialogResult.Result.ToString());
        }

        public bool KeepAlive => false;


        public DelegateCommand Query
        {
            get => new DelegateCommand(() =>
            {
                RequestData();
            });
        }

        //这个方法用于拦截请求,continuationCallback(true)就是不拦截，continuationCallback(false)拦截本次操作
        public void ConfirmNavigationRequest(NavigationContext navigationContext, Action<bool> continuationCallback)
        {
            continuationCallback(true);
        }


        //接收导航传过来的参数
        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            //查询表格数据
            RequestData();
        }

        void RequestData()
        {

            Channels = SqlSugarHelper.Db.Queryable<ChannelStock>()
                .LeftJoin<DrugInfo>((cs,di) => cs.DrugId == di.DrugId.ToString())
                .Where((cs) => cs.DrawerType != (Int32)DrawerTypeEnum.drawerTypeOne && cs.MachineId == (ConfigurationManager.AppSettings["machineId"] ?? "DM1"))
                .Select((cs, di) => new ChannelStock{
                    CanReturnQuantity = SqlFunc.Subqueryable<MachineRecord>().Where(mr => mr.DrugId == cs.DrugId).Where(mr => mr.Type == 2).Where(mr => mr.Status != 2).Select(mr => SqlFunc.IsNull(SqlFunc.AggregateSumNoNull(mr.Quantity - mr.ReturnQuantity1 - mr.ReturnQuantity2), 0)) ,
                    DrugInfo = new DrugInfo
                    {
                        DrugId = di.DrugId,
                        DrugName = di.DrugName,
                        DrugSpec = di.DrugSpec,
                        Manufactory = di.Manufactory,
                        PackUnit = di.PackUnit,
                    },
                    Quantity = cs.Quantity
                }, true)
                .OrderBy(cs => cs.DrawerNo)
                .OrderBy(cs => cs.ColNo)
                .ToList()
                ;
            _ = Channels.Count;
        }

        //每次导航的时候，该实列用不用重新创建，true是不重新创建,false是重新创建
        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            return true;
        }

        //这个方法用于拦截请求
        public void OnNavigatedFrom(NavigationContext navigationContext)
        {

        }
    }
}