c# - UWP GetFilesAsync

Question

我正在尝试获取 LocalState 文件夹中的所有“*.csv”文件。并得到以下错误。

System.ArgumentException: '参数不正确。

这是我的代码:

        StorageFolder appInstalledFolder = ApplicationData.Current.LocalFolder;
        StorageFolder assets = await appInstalledFolder.GetFolderAsync("*.csv");
        var files = await assets.GetFilesAsync();

Answer 1

您可以使用文件查询来实现:

//this may be any folder you want.
StorageFolder folder = ApplicationData.Current.LocalFolder;
var options = new QueryOptions();
options.FileTypeFilter.Add(".csv");//this will add .csv files to query options 
options.FolderDepth = FolderDepth.Deep;//optional
StorageFileQueryResult query = folder.CreateFileQueryWithOptions(options);
IReadOnlyList<StorageFile> fileList = await query.GetFilesAsync();

MSDN - StorageFileQueryResult

希望这有帮助..