Windows 8中使用C#的WinRT中的磁盘空间

我有两种解决方案，但都对我没有用。

解决方案1:kernel32.dll（其工作代码）

注意：但我不想在我的应用程序中导入任何dll。b/c市场提交的问题

[DllImport("kernel32.dll", SetLastError = true)]
static extern bool GetDiskFreeSpaceEx(
    string lpDirectoryName,
    out ulong lpFreeBytesAvailable,
    out ulong lpTotalNumberOfBytes,
    out ulong lpTotalNumberOfFreeBytes);


static void TestDiskSpace()
{
    IStorageFolder appFolder = ApplicationData.Current.LocalFolder;
    ulong a, b, c;
    if(GetDiskFreeSpaceEx(appFolder.Path, out a, out b, out c))
        Debug.WriteLine(string.Format("{0} bytes free", a));
}

解决方案2：使用DriveInfo类（不适用于WinRT的工作代码）

注意：WinRT开发中缺少命名空间。WinRT for windows 8开发不支持此类

DriveInfo[] allDrives = DriveInfo.GetDrives();

    foreach (DriveInfo d in allDrives)
    {
        Console.WriteLine("Drive {0}", d.Name);
        Console.WriteLine("  File type: {0}", d.DriveType);
        if (d.IsReady == true)
        {
            Console.WriteLine("  Volume label: {0}", d.VolumeLabel);
            Console.WriteLine("  File system: {0}", d.DriveFormat);
            Console.WriteLine(
                "  Available space to current user:{0, 15} bytes", 
                d.AvailableFreeSpace);

            Console.WriteLine(
                "  Total available space:          {0, 15} bytes",
                d.TotalFreeSpace);

            Console.WriteLine(
                "  Total size of drive:            {0, 15} bytes ",
                d.TotalSize);
        }
    }

因此，请为我提供一个不同的解决方案或任何替代方案

哪个对winrt for windows 8开发有用？

试试这个（它是用JavaScript编写的，但很容易翻译成C）：

您可以按照最初的要求，用任何其他StorageFolder替换appdata文件夹，例如音乐库文件夹。

这是Kraig所说的C版本，并使用一些代码将其转换为字符串，以便更好地测量：

using System;
using System.Threading.Tasks;
using Windows.Storage;

namespace WinRTXamlToolkit.IO.Extensions
{
    public static class StorageItemExtensions
    {
        public static async Task<UInt64> GetFreeSpace(this IStorageItem sf)
        {
            var properties = await sf.GetBasicPropertiesAsync();
            var filteredProperties = await properties.RetrievePropertiesAsync(new[] { "System.FreeSpace" });
            var freeSpace = filteredProperties["System.FreeSpace"];
            return (UInt64)freeSpace;
        }

        public static string GetSizeString(this ulong sizeInB, double promoteLimit = 1024, double decimalLimit = 10, string separator = " ")
        {
            if (sizeInB < promoteLimit)
                return string.Format("{0}{1}B", sizeInB, separator);

            var sizeInKB = sizeInB / 1024.0;

            if (sizeInKB < decimalLimit)
                return string.Format("{0:F1}{1}KB", sizeInKB, separator);

            if (sizeInKB < promoteLimit)
                return string.Format("{0:F0}{1}KB", sizeInKB, separator);

            var sizeInMB = sizeInKB / 1024.0;

            if (sizeInMB < decimalLimit)
                return string.Format("{0:F1}{1}MB", sizeInMB, separator);

            if (sizeInMB < promoteLimit)
                return string.Format("{0:F0}{1}MB", sizeInMB, separator);

            var sizeInGB = sizeInMB / 1024.0;

            if (sizeInGB < decimalLimit)
                return string.Format("{0:F1}{1}GB", sizeInGB, separator);

            if (sizeInGB < promoteLimit)
                return string.Format("{0:F0}{1}GB", sizeInGB, separator);

            var sizeInTB = sizeInGB / 1024.0;

            if (sizeInTB < decimalLimit)
                return string.Format("{0:F1}{1}TB", sizeInTB, separator);

            return string.Format("{0:F0}{1}TB", sizeInTB, separator);
        }
    }
}

---

看起来像是的副本，是的，我们看到了该解决方案，但我们无法在WinRT开发b/c中导入dll文件，这是市场认证的问题。感谢添加该翻转！

using System;
using System.Threading.Tasks;
using Windows.Storage;

namespace WinRTXamlToolkit.IO.Extensions
{
    public static class StorageItemExtensions
    {
        public static async Task<UInt64> GetFreeSpace(this IStorageItem sf)
        {
            var properties = await sf.GetBasicPropertiesAsync();
            var filteredProperties = await properties.RetrievePropertiesAsync(new[] { "System.FreeSpace" });
            var freeSpace = filteredProperties["System.FreeSpace"];
            return (UInt64)freeSpace;
        }

        public static string GetSizeString(this ulong sizeInB, double promoteLimit = 1024, double decimalLimit = 10, string separator = " ")
        {
            if (sizeInB < promoteLimit)
                return string.Format("{0}{1}B", sizeInB, separator);

            var sizeInKB = sizeInB / 1024.0;

            if (sizeInKB < decimalLimit)
                return string.Format("{0:F1}{1}KB", sizeInKB, separator);

            if (sizeInKB < promoteLimit)
                return string.Format("{0:F0}{1}KB", sizeInKB, separator);

            var sizeInMB = sizeInKB / 1024.0;

            if (sizeInMB < decimalLimit)
                return string.Format("{0:F1}{1}MB", sizeInMB, separator);

            if (sizeInMB < promoteLimit)
                return string.Format("{0:F0}{1}MB", sizeInMB, separator);

            var sizeInGB = sizeInMB / 1024.0;

            if (sizeInGB < decimalLimit)
                return string.Format("{0:F1}{1}GB", sizeInGB, separator);

            if (sizeInGB < promoteLimit)
                return string.Format("{0:F0}{1}GB", sizeInGB, separator);

            var sizeInTB = sizeInGB / 1024.0;

            if (sizeInTB < decimalLimit)
                return string.Format("{0:F1}{1}TB", sizeInTB, separator);

            return string.Format("{0:F0}{1}TB", sizeInTB, separator);
        }
    }
}

var freeSpace = await ApplicationData.Current.LocalFolder.GetFreeSpace();
Debug.WriteLine(freeSpace.GetSizeString());