private static async Task Clear(this StorageFolder folder, List <FileMetaData> list, ulong maxSize)
{
if (list == null || !list.Any())
{
return;
}
var total = (ulong)list.Sum(x => (long)x.Size);
if (total > maxSize)
{
try
{
var file = await folder.GetFileAsync(list.First().Name);
await file.DeleteAsync(StorageDeleteOption.PermanentDelete);
}
catch (FileNotFoundException)
{
//Already deleted
}
catch (UnauthorizedAccessException)
{
//File might be in use. Ignore it and continue with the other files
}
finally
{
list.RemoveAt(0);
}
//Recursive
await folder.Clear(list, maxSize).ConfigureAwait(false);
}
}
public static async Task Clear(this StorageFolder folder, ulong maxSize)
{
var files = await folder.GetFilesAsync();
var list = new List <FileMetaData>();
foreach (var file in files)
{
var props = await file.GetBasicPropertiesAsync();
list.Add(new FileMetaData {
Name = file.Name, Size = props.Size, Modified = props.DateModified
});
}
//Order list by Modified date so it deletes old files first
list = list.OrderBy(x => x.Modified).ToList();
await folder.Clear(list, maxSize).ConfigureAwait(false);
}