- Photo reader how to#
- Photo reader update#
- Photo reader software#
- Photo reader code#
- Photo reader windows#
Photo reader how to#
That's because what we've done so far is to ask the GridView to render a collection of objects of type ImageFileInfo and the GridView doesn't quite know how to do that yet. You can build and run now if you like (to confirm you've followed the steps ok), but there's not much to see in the window at this stage.
Photo reader update#
The last thing we need to do in this section is to update the constructor of MainWindow to call GetItemsAsync. Var properties = await () įile, file.DisplayName, file.DisplayType) Public async static Task LoadImageInfo(StorageFile file) IReadOnlyList imageFiles = await result.GetFilesAsync() Var result = picturesFolder.CreateFileQueryWithOptions(new QueryOptions()) StorageFolder picturesFolder = await appInstalledFolder.GetFolderAsync("Assets\\Samples") Paste the using directives, and the two method implementations, into, too.
Photo reader code#
The code to populate the new collection property with images is shown in the GetItemsAsync and LoadImageInfo methods below. ImageRating = rating = 0 ? random.Next(1, 5) : rating Public ImageFileInfo(ImageProperties properties, Public class ImageFileInfo : INotifyPropert圜hanged Replace the contents of ImageFileInfo.cs with the code listing below. Set the name to ImageFileInfo.cs, and click Add. Under Visual C# Items > Code, select Class. Right-click the project node ( SimplePhotos), and click Add > New Item. But even so, we'll show how to make ImageFileInfo observable, by having it implement the INotifyPropert圜hanged interface.
In the app that we build in this tutorial, the properties of our ImageFileInfo model won't change.
Photo reader software#
This idea is based on the software design pattern known as the observer pattern. A property that can be dynamically bound to a XAML control (so that the UI updates each time the property value changes) is known as an observable property. In preparation for the code example below, let's introduce the term observable. Replace the StackPanel and Button markup with the Grid layout panel and the GridView control shown in the listing below. In the app we'll be building, the main window's job is to load the photos from the Samples folder, and to display a tiled view of those images together with various info about them. The main window of any app represents the view that you see first when you run the app. Inside the StackPanel is a Button control, which is hooked up to an event handler method.
Currently, there's a Window element, and within that a StackPanel layout panel. For a UI like that, the main controls to use are List view and grid view. Our app needs to display rows and columns of photos. You can hover the mouse pointer over them, and a thumbnail preview will appear for each. Paste (into the Assets folder) the Samples folder that you just copied.īack in Visual Studio you'll see that a new Samples folder is now a child of Assets and inside Samples are several photos. That opens the Assets folder in File Explorer. Now, in Solution Explorer in Visual Studio, right-click the Assets folder (it's a child of the project node), and click Open Folder in File Explorer. In File Explorer, select that Samples folder, and copy it to the clipboard. If you want to see them in the repo online, then you can visit WindowsAppSDK-Samples/Samples/PhotoEditor/cs-winui/Assets/Samples/. Having done that, you'll find the asset files that we'll be using in the folder \WindowsAppSDK-Samples\Samples\PhotoEditor\cs-winui\Assets\Samples.
Photo reader windows#
zip) the Windows App SDK samples repo (see WindowsAppSDK-Samples). But first you'll need to obtain a copy of the files. In this section you'll add those assets to your project. The app that we'll be building carries image files around with it in the form of asset files and those are the photos that it displays. You can target the most recent release (not preview) of the client operating system. Name the project SimplePhotos, and (so that your folder structure will match the one described in this tutorial) uncheck Place solution and project in the same directory. In Visual Studio, create a new C# project from the Blank App, Packaged (WinUI 3 in Desktop) project template. Be sure to check any limitations and known issues in those release notes, since those might affect the results of following along with this tutorial and/or running the app we'll build. There are release notes for each channel.
You'll find release notes topics along with the Windows App SDK release channels topic.