上次我检查你必须捕获一个异常:(可能已更改)

Last time I checked you had to catch an exception: (might have changed)

这是一种方法:)

像这样:

    static async Task<bool> DoesFileExistAsync(string fileName)
    {
        try
        {
            await ApplicationData.Current.LocalFolder.GetFileAsync(fileName);
            return true;
        }
        catch
        {
            return false;
        }
    }