Step by step manual for PickSingleFileAndContinue?

Question

Its about using PickSingleFileAndContinue. As i know its a bit different than the traditional PicksingleFileasync. Here you have to suspend the app and continue after file choosing. In that page below is too much information for me. Can an Expert simply write a step-by-step manual for a single file selection please? https://msdn.microsoft.com/en-us/library/windows/apps/xaml/dn614994.aspx

Sandesh Karki · Answer

Ah sorry About that: then you have to get to files in your project ContinuationManager (look at buttom of this page https://msdn.microsoft.com/en-us/library/windows/apps/xaml/dn631755.aspx) and suspensionManager(create new WP project whis is not blank type) then inherit this interface IFileOpenPickerContinuable in the page u are using file picker, Add property public ContinuationManager ContinuationManager { get ; private set ; } in app.xaxml.cs instanciate continuationManager = new ContinuationManager(); inside onactivated method write this code below instantiation: Frame rootFrame = CreateRootFrame(); await RestoreStatusAsync(e.PreviousExecutionState); if (rootFrame.Content == null ) { rootFrame.Navigate( typeof (MainPage)); } var continuationEventArgs = e as IContinuationActivatedEventArgs; if (continuationEventArgs != null ) { Frame scenarioFrame = MainPage.Current.FindName( "pageName where fileopenpickeris used" ) as Frame; if (scenarioFrame != null ) { // Call ContinuationManager to handle continuation activation continuationManager.Continue(continuationEventArgs, scenarioFrame); } } Window.Current.Activate(); now add this method inside the page where filepicker is used: public void ContinueFileOpenPicker(FileOpenPickerContinuationEventArgs args) { StorageFile file= args.Files[0]; }

Ilker Mersinlioglu · Answer

Hi Sandesh, its not so easyanymore as in your answer. PickSingleFileAndContinue(); is of type "void" and cannot be assigned to a storageFile. It must work over passthrough parameter between the classes.

Sandesh Karki · Answer

//initialize fileopenPicker FileOpenPicker openPicker = new FileOpenPicker(); //viewmode of picker openPicker.ViewMode = PickerViewMode.Thumbnail; //picker starts in picture library openPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary; // add filter type openPicker.FileTypeFilter.Add( ".jpg" ); openPicker.FileTypeFilter.Add( ".jpeg" ); openPicker.FileTypeFilter.Add( ".png" ); // Launch file open picker and caller app is suspended // and may be terminated if required openPicker.PickSingleFileAndContinue(); to save the file u can use StorageFile file= openPicker.PickSingleFileAndContinue(); u might have to check weather fie is null or not to make sure user did select file or else app will crash

Step by step manual for PickSingleFileAndContinue?

Answers (3)