Windows 通用应用程序错误 System.IO.FileSystem - Cordova

Question

我正在尝试在 Windows 10 cordova 应用程序中使用两个不同的 Windows UWP 项目。两个项目都产生相同的错误。其中一个项目的代码如下：

using System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
using System.Threading.Tasks;
using Windows.Foundation;
using Windows.Storage;

namespace DiskSpaceLibrary
{
    public sealed class DiskSpace
    {

        internal static readonly StorageFolder[] APP_FOLDERS = {
            ApplicationData.Current.LocalFolder,
            ApplicationData.Current.RoamingFolder,
            ApplicationData.Current.TemporaryFolder
        };

        [DataContract]
        internal class Result
        {
            [DataMember]
            internal ulong app = 0;
            [DataMember]
            internal ulong total = 0;
            [DataMember]
            internal ulong free = 0;
        }

        // Manually compute total size of the given StorageFolder
        private static ulong sizeFolder(StorageFolder folder)
        {
            ulong folderSize = 0;
            try
            {
                DirectoryInfo dirInfo = new DirectoryInfo(folder.Path);

                // Get back a prefilled (with size) list of files contained in given folder
                foreach (var fileInfo in dirInfo.EnumerateFiles("*", SearchOption.AllDirectories))
                {
                    folderSize += (ulong)fileInfo.Length;
                }
            }
            catch (Exception e)
            {
                System.Diagnostics.Debug.WriteLine(e.ToString());
                return 0;
            }
            return folderSize;
        }

        // Return the system FreeSpace and Capacity properties
        private async static Task<IDictionary<string, object>> getExtraProperties()
        {
            var basicProperties = await Windows.Storage.ApplicationData.Current.LocalFolder.GetBasicPropertiesAsync();
            return await basicProperties.RetrievePropertiesAsync(new string[] { "System.FreeSpace", "System.Capacity" });
        }

        // Class Entry point 
        public static IAsyncOperation<string> info(string args)
        {
            // Entry point in WinRT can not return Task<T> - so here is a trick to convert IAsyncOperation (WinRT) into classic C# async
            return infoTask().AsAsyncOperation();
        }

        // The real disk space work is done here within some asynchronous stuff
        private async static Task<string> infoTask()
        {
            Result result = new Result();

            // Run folder discovery into another Thread to not block UI Thread
            await Task.Run(() => {

                foreach (var folder in APP_FOLDERS)
                {
                    result.app += sizeFolder(folder);
                }
            });

            await getExtraProperties().ContinueWith(propertiesTask =>
            {
                result.free = (ulong)propertiesTask.Result["System.FreeSpace"];
                result.total = (ulong)propertiesTask.Result["System.Capacity"];
            });

            // Return JSON Result
            DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(Result));
            MemoryStream outputMs = new MemoryStream();
            serializer.WriteObject(outputMs, result);

            outputMs.Position = 0;
            StreamReader sr = new StreamReader(outputMs);

            return sr.ReadToEnd();

        }
    }
}

此项目来自https://github.com/sqli/sqli-cordova-disk-space-plugin

它只是查找已用磁盘空间，并使用 System.IO.DirectoryInfo 和异步方法报告已用和可用空间，以获取可用空间和容量。

当我构建时，它生成 winmd 文件没有问题，我已在我的 cordova (Visual Studio 2017) 项目中正确注册并加载这些文件，构建 Windows 10 并运行 - 当我在主 cordova 项目中运行此代码时

DiskSpacePlugin.info({}, function (ok) { console.log(ok); }, function (err) { console.log(err); });

我在控制台中得到这个结果

WinRTError: The system cannot find the file specified.

System.IO.FileNotFoundException: Could not load file or assembly 'System.IO.FileSystem, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
   at DiskSpaceLibrary.DiskSpace.sizeFolder(StorageFolder folder)
   at DiskSpaceLibrary.DiskSpace.<>c__DisplayClass5_0.<infoTask>b__0()
   at System.Threading.Tasks.Task.Execute()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.Ex
console-via-logger.js (173,15)
   {
      [functions]: ,
      __proto__: { },
      asyncOpCausalityId: 461,
      asyncOpSource: { },
      asyncOpType: "Windows.Foundation.IAsyncOperation`1<String>",
      description: "The system cannot find the file specified.

System.IO.FileNotFoundException: Could not load file or assembly 'System.IO.FileSystem, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
   at DiskSpaceLibrary.DiskSpace.sizeFolder(StorageFolder folder)
   at DiskSpaceLibrary.DiskSpace.<>c__DisplayClass5_0.<infoTask>b__0()
   at System.Threading.Tasks.Task.Execute()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.Ex",
      message: "The system cannot find the file specified.

System.IO.FileNotFoundException: Could not load file or assembly 'System.IO.FileSystem, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
   at DiskSpaceLibrary.DiskSpace.sizeFolder(StorageFolder folder)
   at DiskSpaceLibrary.DiskSpace.<>c__DisplayClass5_0.<infoTask>b__0()
   at System.Threading.Tasks.Task.Execute()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.Ex",
      name: "WinRTError",
      number: -2147024894
   }

我还尝试了另一个模块来解压缩cordova windows 10项目中的文件（我没有这个的源，但是它来自https://github.com/Culture22/cordova-windows10-zip），当我尝试时它会出现完全相同的错误消息在应用程序中运行它。

在过去的 4 天里，我在谷歌上搜索并寻找了这个问题，但我无法取得进展，所使用的方法都得到了框架的支持，显然正在查看 (msdn.microsoft.com/en-us/library/windows /apps/mt185496.aspx) - 有没有人有任何见解？

Answer 1

您引用的库似乎引用了 System.IO.FileSystem.dll，但无论出于何种原因，它都没有与您的应用程序一起部署。我建议尝试向您的应用程序添加对 System.IO.FileSystem.dll 的 nuget 引用。