windows-10 – UWP应用程序从系统上的随机位置访问文件

public async static Task<byte[]> ToByteArray(this StorageFile file)
    {
        byte[] fileBytes = null;
        using (IRandomAccessStreamWithContentType stream = await file.OpenReadAsync())
        {
            fileBytes = new byte[stream.Size];

            using (DataReader reader = new DataReader(stream))
            {
                await reader.LoadAsync((uint)stream.Size);
                reader.ReadBytes(fileBytes);
            }
        }

        return fileBytes;
    }

这个班..

public class AppFile
    {
        public string FileName { get; set; }
        public byte[] ByteArray { get; set; }
    }

而这个变量

List<AppFile> _appFiles = new List<AppFile>();

只是..

var fileOpenPicker = new FileOpenPicker();
    IReadOnlyList<StorageFile> files = await fileOpenPicker.PickMultipleFilesAsync();

    foreach (var file in files)
    {
        var byteArray = await file.ToByteArray();
        _appFiles.Add(new AppFile { FileName = file.DisplayName,ByteArray = byteArray });
    }

UPDATE

using Newtonsoft.Json;
using System.Linq;
using Windows.Security.Credentials;
using Windows.Storage;

namespace Your.Namespace
{
    public class StateService
    {
        public void SaveState<T>(string key,T value)
        {
            var localSettings = ApplicationData.Current.LocalSettings;
            localSettings.Values[key] = JsonConvert.SerializeObject(value);
        }

        public T LoadState<T>(string key)
        {
            var localSettings = ApplicationData.Current.LocalSettings;
            if (localSettings.Values.ContainsKey(key))
                return JsonConvert.DeserializeObject<T>(((string)    localSettings.Values[key]));
            return default(T);
        }

        public void RemoveState(string key)
        {
            var localSettings = ApplicationData.Current.LocalSettings;
            if (localSettings.Values.ContainsKey(key))
                localSettings.Values.Remove((key));
        }

        public void Clear()
        {
            ApplicationData.Current.LocalSettings.Values.Clear();
        }
    }
}