38 lines
1.1 KiB
C#
38 lines
1.1 KiB
C#
namespace Prism_1_MainApplication.ViewModels;
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public class MainViewModel : BindableBase
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{
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private readonly IRegionManager _regionManager;
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private IRegionNavigationJournal? _journal;
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public MainViewModel(IRegionManager regionManager)
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{
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_regionManager = regionManager;
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OpenCommand = new DelegateCommand<string>(Open);
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BackCommand = new DelegateCommand(GoBack);
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}
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public DelegateCommand<string> OpenCommand { get; private set; }
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public DelegateCommand BackCommand { get; private set; }
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private void GoBack()
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{
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if (_journal is { CanGoBack: true }) _journal.GoBack();
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}
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private void GoForward()
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{
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if (_journal is { CanGoForward: true }) _journal.GoForward();
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}
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private void Open(string obj)
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{
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var keys = new NavigationParameters { { "Title", "标题信息" } };
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_regionManager.Regions["MainRegion"].RequestNavigate(obj, callback =>
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{
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if (callback.Success && callback.Context != null)
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_journal = callback.Context.NavigationService.Journal;
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}, keys);
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}
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} |