See the AvailableFreeSpace of drives via IP-Address

Question

I know that, AvailableFreeSpace is possible to use for local drives such as "C:/", "D:/" etc. It also works on network drives.

But now my question is:

Is it possible to view the AvailableFreeSpace of a "Folder" on another IP? I connect to the local drives with this code:

System.IO.DriveInfo _DriveInfo = new DriveInfo(SaveLocation);

When "SaveLocation" is a local drive like "C:\Temp\Folder", than it works fine.

But when there is an IP inside "SaveLocation" it doesn't work. SaveLocation looks like this in that case: "192.168.200.10\c\Data"

This doesn't work and that is the reason for my question. The Exceptionmessage is: {"Object must be a root directory (\"C:\\") or a drive letter (\"C\")."}

I hope you can help me.

Answer 1

As seen in Get available disk free space for a given path on Windows :

Use the winapi function GetDiskFreeSpaceEx to determine free space on a UNC (network) path. For example, create a new VS Project called FreeSpace and paste this as Program.cs:

    using System;
    using System.Runtime.InteropServices;

    namespace FreeSpace
    {
        class Program
        {
            [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
            [return: MarshalAs(UnmanagedType.Bool)]
            static extern bool GetDiskFreeSpaceEx(string lpDirectoryName,
                                        out ulong lpFreeBytesAvailable,
                                        out ulong lpTotalNumberOfBytes,
                                        out ulong lpTotalNumberOfFreeBytes);

            static void Main(string[] args)
            {
                ulong FreeBytesAvailable;
                ulong TotalNumberOfBytes;
                ulong TotalNumberOfFreeBytes;

                bool success = GetDiskFreeSpaceEx(@"\\NETSHARE\folder",
                                              out FreeBytesAvailable,
                                              out TotalNumberOfBytes,
                                              out TotalNumberOfFreeBytes);
                if (!success)
                    throw new System.ComponentModel.Win32Exception();

                Console.WriteLine("Free Bytes Available:      {0,15:D}", FreeBytesAvailable);
                Console.WriteLine("Total Number Of Bytes:     {0,15:D}", TotalNumberOfBytes);
                Console.WriteLine("Total Number Of FreeBytes: {0,15:D}", TotalNumberOfFreeBytes);
                Console.ReadKey();
            }
        }
    }

As you can see, this is the exact same code as in the Question linked above, just factored into a class plus the correct using directives to compile without error. All credits go to https://stackoverflow.com/users/995926/rekire

WMI doesn't seem to handle free space on network shares. But for local disks, Windows Management Interface is the way to go: https://msdn.microsoft.com/en-us/library/aa394592(v=vs.85).aspx