75 lines
2.3 KiB
C#
75 lines
2.3 KiB
C#
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using DM_Weight.Common;
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using DM_Weight.Models;
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using DM_Weight.util;
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using Prism.Commands;
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using Prism.Common;
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using Prism.Mvvm;
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using Prism.Regions;
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using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace DM_Weight.ViewModels
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{
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public class SettingMainWindowViewModel : BindableBase, INavigationAware,IRegionMemberLifetime
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{
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//设置页面数据集
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private ObservableCollection<SettingPage> _settingPages;
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public ObservableCollection<SettingPage> SettingPages
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{
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get => _settingPages;
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set=>SetProperty(ref _settingPages, value);
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}
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//默认加载页面
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string defaultView = string.Empty;
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IRegionManager _regionManager;
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public SettingMainWindowViewModel(IRegionManager regionManager)
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{
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this._regionManager=regionManager;
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}
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//选中事件
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public DelegateCommand<string> NavigateCommand { get => new DelegateCommand<string>(navigateAction); }
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public bool KeepAlive => false;
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private void navigateAction(string obj)
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{
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if(obj==null||string.IsNullOrWhiteSpace(obj))
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{
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return;
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}
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defaultView = obj;
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_regionManager.RequestNavigate(PrismManager.SettingViewRegionName, defaultView);
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}
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public bool IsNavigationTarget(NavigationContext navigationContext)
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{
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return true;
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}
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public void OnNavigatedFrom(NavigationContext navigationContext)
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{
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}
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public void OnNavigatedTo(NavigationContext navigationContext)
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{
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if(SettingPages is null|| SettingPages.Count<=0)
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{
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SettingPages=new ObservableCollection<SettingPage>(SqlSugarHelper.Db.Queryable<SettingPage>().ToList());
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if(SettingPages.Count>0)
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{
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if(string.IsNullOrEmpty(defaultView))
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{
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defaultView = SettingPages[0].ViewName;
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}
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_regionManager.RequestNavigate(PrismManager.SettingViewRegionName,defaultView);
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}
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}
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}
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}
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}
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