private async void Find_Click(object sender, RoutedEventArgs e)
{
ContentTextOutput.Text = "";
if (FindQueryText.Text == "")
{
return;
}
List <string> propertyNames = new List <string>();
propertyNames.Add("System.FileName");
var queryOptions = new Windows.Storage.Search.QueryOptions();
queryOptions.IndexerOption = Windows.Storage.Search.IndexerOption.OnlyUseIndexer;
queryOptions.UserSearchFilter = FindQueryText.Text;
queryOptions.SetPropertyPrefetch(Windows.Storage.FileProperties.PropertyPrefetchOptions.DocumentProperties, propertyNames);
// Query the Pictures library.
StorageFolder picturesLibrary = await KnownFolders.GetFolderForUserAsync(null /* current user */, KnownFolderId.PicturesLibrary);
StorageFileQueryResult queryResult = picturesLibrary.CreateFileQueryWithOptions(queryOptions);
IReadOnlyList <StorageFile> files = await queryResult.GetFilesAsync(0, 20); // limit to 20 results
foreach (StorageFile file in files)
{
IDictionary <String, IReadOnlyList <Windows.Data.Text.TextSegment> > fileRangeProperties = queryResult.GetMatchingPropertiesWithRanges(file);
if (fileRangeProperties.ContainsKey("System.FileName"))
{
IReadOnlyList <Windows.Data.Text.TextSegment> ranges;
fileRangeProperties.TryGetValue("System.FileName", out ranges);
rootPage.HighlightRanges(ContentTextOutput, file.DisplayName, ranges);
}
// Note: You can continue looking for other properties you would like to highlight on the file here.
}
if (files.Count == 0)
{
ContentTextOutput.Text = "There were no matching files in your Pictures Library";
}
}