public MainPageViewModel(INavigationService navigationService, IEventAggregator eventAggregator,
IPageDialogService dialogService, IPicture picture
)
{
//IUnityContainer myContainer = (App.Current as PrismApplication).Container;
//_picture= myContainer.Resolve<IPicture>();
// 相依性服務注入的物件
_picture = picture;
_dialogService = dialogService;
_eventAggregator = eventAggregator;
_navigationService = navigationService;
// 頁面中綁定的命令
TakePictureCommand = new DelegateCommand(async() =>
{
var fooAction = await _dialogService.DisplayActionSheetAsync("請選擇圖片來源", "取消", null, "相簿", "拍照");
if (fooAction == "相簿")
{
App.CroppedImage = null;
await SelectPicture();
}
else if (fooAction == "拍照")
{
App.CroppedImage = null;
await TakePicture();
}
else if (fooAction == "取消")
{
}
});
SavePictureCommand = new DelegateCommand(() =>
{
if (App.CroppedImage != null)
{
_picture.SavePictureToDisk("MyCrop", App.CroppedImage);
}
});
LoadPictureCommand = new DelegateCommand(() =>
{
App.CroppedImage = _picture.LoadPictureFromDisk("MyCrop");
Stream stream = new MemoryStream(App.CroppedImage);
fooLoadImageSource = ImageSource.FromStream(() => stream);
});
}
