我在Caliburn.Micro中遇到了一些墓碑问题。我有一个枢轴控制，我们在每个枢轴控制项中都有一个列表框。我只是想使用caliburn.micro的内置支持来保存列表
我有一个MainViewModel，它将在飞行员控件中初始化一系列子VM
public class MainViewModel : Conductor<IScreen>.Collection.OneActive
{
private readonly Func<QiushiListViewModel> _createQiushiListViewModel;
private readonly INavigationService _navigationService;
private readonly IEventAggregator _events;
readonly IWindowManager _windowManager;
readonly Func<AboutUsViewModel> _aboutUsViewModelFactory;
readonly Func<SettingsViewModel> _settingsViewModelFactory;
public MainViewModel(Func<QiushiListViewModel> createQiushiListViewModel,
INavigationService navigationService,
IEventAggregator events,
IWindowManager windowManager,
Func<AboutUsViewModel> aboutUsViewModelFactory,
Func<SettingsViewModel> settingsViewModelFactory
)
{
_createQiushiListViewModel = createQiushiListViewModel;
_navigationService = navigationService;
_events = events;
_windowManager = windowManager;
_aboutUsViewModelFactory = aboutUsViewModelFactory;
_settingsViewModelFactory = settingsViewModelFactory;
}
protected override void OnInitialize()
{
if(Items.Count==0)
{
Enumerable.Range(1, 5).Apply(x =>
{
var pivot = _createQiushiListViewModel();
switch (x)
{
case 1:
pivot.DisplayName = AppResources.App_Pivot_First;
pivot.Section = "late";
break;
case 2:
pivot.DisplayName = AppResources.App_Pivot_Second;
pivot.Section = "pic";
break;
case 3:
pivot.DisplayName = AppResources.App_Pivot_Third;
pivot.Section = "8hr";
break;
case 4:
pivot.DisplayName = AppResources.App_Pivot_Fourth;
pivot.Section = "week";
break;
case 5:
pivot.DisplayName = AppResources.App_Pivot_Fifth;
pivot.Section = "month";
break;
default:
break;
}
Items.Add(pivot);
});
ActivateItem(Items[0]);
}
...
}
}
子VM如下
public class QiushiListViewModel :
Screen,
IHandle<RefreshListMessage>,
IHandle<RetrieveNewItemsMessage>,
IHandle<TaskCompleted<EmailComposeTask>>,
IHandle<TaskCompleted<SmsComposeTask>>
{
private const int DefaultItemsPerPage = 20;
readonly IEventAggregator _events;
private readonly INavigationService _navigationService;
public QiushiListViewModel(
IEventAggregator events,
INavigationService navigationService)
{
ItemsPerPage = DefaultItemsPerPage;
_events = events;
_navigationService = navigationService;
_qiushiItems = new SortableObservableCollection<QiushiItem>();
}
protected override void OnActivate()
{
_events.Subscribe(this);
base.OnActivate();
}
protected override void OnDeactivate(bool close)
{
SelectedItem = null;
_events.Unsubscribe(this);
base.OnDeactivate(close);
}
public string Section { get; set; }
public int Page { get; set; }
public int ItemsPerPage { get; set; }
public int CountOfItemsUpdated { get; set; }
public bool HasErrors { get; set; }
private SortableObservableCollection<QiushiItem> _qiushiItems;
public IEnumerable<QiushiItem> QiushiItems
{
get { return _qiushiItems; }
}
private bool _isBusy;
public bool IsBusy
{
get { return _isBusy; }
set
{
if (_isBusy == value)
return;
_isBusy = value;
NotifyOfPropertyChange(() => IsBusy);
}
}
private bool _canLoadMore;
public bool CanLoadMore
{
get { return _canLoadMore; }
set
{
if (_canLoadMore == value)
return;
_canLoadMore = value;
NotifyOfPropertyChange(() => CanLoadMore);
}
}
private QiushiItem _selectedItem;
public QiushiItem SelectedItem
{
get { return _selectedItem; }
set
{
if(_selectedItem == value)
return;
_selectedItem = value;
NotifyOfPropertyChange(() => SelectedItem);
}
}
...
}
我尝试实现QiushiListViewModelStorage
public override void Configure()
{
Id(x=>x.Section);
Property(x => x.CanLoadMore).InAppSettings();
Property(x => x.IsBusy).InAppSettings();
Property(x => x.Page).InAppSettings();
Property(x => x.QiushiItems).InAppSettings();
}
它不起作用，没有任何反应，没有错误，没有例外。 QiushiItem类是可序列化的，请参阅以下代码段
[DataContract]
public class QiushiItem : IComparable, IEqualityComparer<QiushiItem>
{
[DataMember]
public int Id { get; set; }
[DataMember]
public string Content { get; set; }
[DataMember]
public string ImageUrl { get; set; }
[DataMember]
public string MobileImageUrl { get; set; }
[DataMember]
public string Tags { get; set; }
[DataMember]
public int Tops { get; set; }
[DataMember]
public int Flops { get; set; }
[DataMember]
public int CommentsCount { get; set; }
[DataMember]
public DateTime PublishDateTime { get; set; }
public string Age
{
get
{
if (DateTime.Now.Subtract(PublishDateTime).Minutes < 10)
return AppResources.App_TimeSpan_JustNow;
if (DateTime.Now.Subtract(PublishDateTime).Minutes < 30)
return AppResources.App_TimeSpan_Recently;
if (DateTime.Now.Subtract(PublishDateTime).Minutes < 60)
return AppResources.App_TimeSpan_Half_Hour_Ago;
if (DateTime.Now.Subtract(PublishDateTime).Hours < 2)
return AppResources.App_TimeSpan_An_Hour_Ago;
if (DateTime.Now.Subtract(PublishDateTime).Hours < 3)
return AppResources.App_TimeSpan_Two_Hours_Ago;
if (DateTime.Now.Subtract(PublishDateTime).Hours < 24)
return AppResources.App_TimeSpan_In_One_Day;
if (DateTime.Now.Subtract(PublishDateTime).Days < 2)
return AppResources.App_TimeSpan_One_Day_Ago;
if (DateTime.Now.Subtract(PublishDateTime).Days < 3)
return AppResources.App_TimeSpan_Two_Days_Ago;
if (DateTime.Now.Subtract(PublishDateTime).Days < 7)
return AppResources.App_TimeSpan_In_A_Week;
return DateTime.Now.Subtract(PublishDateTime).Days < 30 ? AppResources.App_TimeSpan_In_A_Month : AppResources.App_TimeSpan_Long_Ago;
}
}
int IComparable.CompareTo(object right)
{
if (!(right is QiushiItem)) throw new ArgumentException(AppResources.Ex_QiushiItem_Comparable_Argument_Exception, "right");
QiushiItem righItem = (QiushiItem) right;
return CompareTo(righItem);
}
public int CompareTo(QiushiItem right)
{
return Id.CompareTo(right.Id);
}
// Relational Operators.
public static bool operator <(QiushiItem left, QiushiItem right)
{
return left.CompareTo(right) < 0;
}
public static bool operator <=(QiushiItem left, QiushiItem right)
{
return left.CompareTo(right) <= 0;
}
public static bool operator >(QiushiItem left, QiushiItem right)
{
return left.CompareTo(right) > 0;
}
public static bool operator >=(QiushiItem left, QiushiItem right)
{
return left.CompareTo(right) >= 0;
}
private static DateTimeComparer _datetimeComparer;
public static IComparer DateTimeCompare
{
get
{
if (_datetimeComparer == null)
_datetimeComparer = new DateTimeComparer();
return _datetimeComparer;
}
}
private class DateTimeComparer : IComparer
{
#region IComparer Members
int IComparer.Compare(object left, object right)
{
if (!(left is QiushiItem))
throw new ArgumentException(AppResources.Ex_QiushiItem_Comparable_Argument_Exception, "left");
if (!(right is QiushiItem))
throw new ArgumentException(AppResources.Ex_QiushiItem_Comparable_Argument_Exception, "right");
QiushiItem leftItem = (QiushiItem)left;
QiushiItem rightItem = (QiushiItem)right;
return leftItem.PublishDateTime.CompareTo(
rightItem.PublishDateTime);
}
#endregion
}
public bool Equals(QiushiItem x, QiushiItem y)
{
if (x.Id == y.Id)
return true;
return false;
}
public int GetHashCode(QiushiItem obj)
{
return obj.Id.GetHashCode();
}
}
除此之外，我还尝试使用自定义序列化
public override void Configure()
{
Id(x=>x.Section);
Property(x => x.QiushiItems).InAppSettings();
Property(x => x.QiushiItems).InAppSettings().Configure(x =>
{
x.Save = SaveStrokes;
x.Restore = RestoreStrokes;
});
}
void SaveStrokes(QiushiListViewModel vm, Func<string> serialize, StorageMode nMode)
{
IsolatedStorageHelper.SaveObject(vm.Section, vm.QiushiItems);
}
void RestoreStrokes(QiushiListViewModel vm, Func<string> serialize, StorageMode nMode)
{
// use IsolatedStorageSettings.ApplicationSettings[vm.DisplayName + "ThePropertyKey"]
// to check if the key exists, and if it is there get the serialized data and deserialize
if (vm.Section == null)
return;
if(IsolatedStorageSettings.ApplicationSettings[vm.Section]!=null)
IsolatedStorageHelper.GetObject<IEnumerable<QiushiItem>>(vm.Section);
}
有什么建议吗？
提前致谢-Peng
答案 0 :(得分：0)
我不是WP7专家，但您是否尝试使用[SurviveTombstone]属性修饰类和属性？
[SurviveTombstone]属性是一个简单的开箱即用 实现[ITombstone]界面，了解如何走路 对象图，检查它的属性并坚持它们。
“ Tombstoning ”标题下的更多详细信息： http://devlicio.us/blogs/rob_eisenberg/archive/2010/08/07/caliburn-micro-soup-to-nuts-pt-4-working-with-windows-phone-7.aspx