Uno.Windows-universal-samples/Samples/FileThumbnails

File and folder thumbnail sample

Shows how to retrieve thumbnails for files and folders using Windows.Storage.FileProperties.

Note: This sample is part of a large collection of UWP feature samples. If you are unfamiliar with Git and GitHub, you can download the entire collection as a ZIP file, but be sure to unzip everything to access shared dependencies. For more info on working with the ZIP file, the samples collection, and GitHub, see Get the UWP samples from GitHub. For more samples, see the Samples portal on the Windows Dev Center.

The sample demonstrates these tasks:

1. Retrieve a thumbnail for a picture

2. Retrieve album art as the thumbnail for a song

3. Retrieve an icon as the thumbnail for a document

4. Retrieve a thumbnail for a folder in the file system

   Note  You can't retrieve a thumbnail for the Pictures library itself because it is a virtual folder. You must choose a file system folder that has pictures in it in order to retrieve a thumbnail.

5. Retrieve a thumbnail for a file group

   A file group is a virtual folder where all the files in the group have the criteria that you specify in common. For example, the sample shows a thumbnail for a file group wherein the files in the group all have the same month and year.

To learn about retrieving the appropriate thumbnail to display to the user, see Guidelines and checklist for thumbnails.

Important APIs in this sample include:

• StorageItemThumbnail class
• ThumbnailMode enumeration
• StorageFile.GetThumbnailAsync methods
• StorageFolder.GetThumbnailAsync methods
• IStorageItemProperties.GetThumbnailAsync methods

Note The Windows universal samples require Visual Studio 2017 to build and Windows 10 to execute.

To obtain information about Windows 10 development, go to the Windows Dev Center

To obtain information about Microsoft Visual Studio and the tools for developing Windows apps, go to Visual Studio

Related topics

Samples

File access sample
File picker sample
Folder enumeration sample
Programmatic file search sample

Reference

Windows.Storage namespace
Windows.Storage.FileProperties namespace

System requirements

Client: Windows 10

Server: Windows Server 2016 Technical Preview

Phone: Windows 10

Build the sample

1. If you download the samples ZIP, be sure to unzip the entire archive, not just the folder with the sample you want to build.
2. Start Microsoft Visual Studio 2017 and select File > Open > Project/Solution.
3. Starting in the folder where you unzipped the samples, go to the Samples subfolder, then the subfolder for this specific sample, then the subfolder for your preferred language (C++, C#, or JavaScript). Double-click the Visual Studio Solution (.sln) file.
4. Press Ctrl+Shift+B, or select Build > Build Solution.

Run the sample

The next steps depend on whether you just want to deploy the sample or you want to both deploy and run it.

Deploying the sample

• Select Build > Deploy Solution.

Deploying and running the sample

• To debug the sample and then run it, press F5 or select Debug > Start Debugging. To run the sample without debugging, press Ctrl+F5 or select Debug > Start Without Debugging.