FileStream Class

Platform Notes

The following example displays an image picked at random from the user's My Pictures folder. It uses the DirectoryInfo class to obtain an enumerable collection of FileInfo objects that represent files that have a .jpg or .png extension. That collection is used to construct a List<T> collection so that an index can be used to select a file that corresponds to the random number.

The example then creates a bitmap image by using the FileStream class and sets it as the source for an Image control (named MyImage).

For example code and information about how to create an application that runs outside the browser, see Out-of-Browser Support.

private void LoadImage()
{

	if (Application.Current.HasElevatedPermissions)
	{
		DirectoryInfo di = new DirectoryInfo(Environment.GetFolderPath(
		   Environment.SpecialFolder.MyPictures));

		var files = from f in di.EnumerateFiles()
					where f.Extension.ToLower() == ".jpg" || 
						f.Extension == ".png"
					select f;

		int max = files.Count() + 1;

		Random rnd = new Random();
		int r = rnd.Next(0, max);

		List<FileInfo> pics = new List<FileInfo>(files);

		string randpic = pics[r].FullName;

		BitmapImage img = new BitmapImage();
		img.SetSource(new FileStream(randpic, FileMode.Open));

		MyImage.Source = img;

	}
}

Silverlight

Silverlight for Windows Phone

XNA Framework

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Reference

Other Resources