using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace getdiskfreespaceC
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
comboBox1.SelectedIndex = 2;
}
private void Form1_Load(object sender, EventArgs e)
{
}
ulong ConvertBytesToMegabytes(ulong bytes)
{
return (bytes / 1024) / 1024;
}
public ulong GetDiskSizeTotal(string volumeName, out ulong avail, out ulong total, out ulong totalfree)
{
MyClass.GetDiskFreeSpaceEx(volumeName, out avail, out total, out totalfree);
return total;
}
public ulong GetDiskSize(string volumeName)
{
ulong avail = 0;
ulong total = 0;
ulong totalfree = 0;
MyClass.GetDiskFreeSpaceEx(volumeName, out avail, out total, out totalfree);
return total;
}
private void button1_Click(object sender, EventArgs e)
{
ulong avail = 0, total = 0, totalfree = 0;
// read size
GetDiskSizeTotal(comboBox1.SelectedItem.ToString(), out avail, out total, out totalfree);
// write size in label
label1.Text = "Avaliable disk space (for this user): " + ConvertBytesToMegabytes(avail).ToString() + " MB";
label2.Text = "Total disk space: " + ConvertBytesToMegabytes(GetDiskSizeTotal(comboBox1.SelectedItem.ToString(), out avail, out total, out totalfree)) + " MB";
label3.Text = "Free disk space: " + ConvertBytesToMegabytes(avail).ToString() + " MB";
}
}
public class MyClass
{
// import from kernel32.dll function GetDiskFreeSpaceEx (total amount)
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
[return: MarshalAs(UnmanagedType.Bool)]
internal static extern bool GetDiskFreeSpaceEx(string lpDirectoryName,
out ulong lpFreeBytesAvailable,
out ulong lpTotalNumberOfBytes,
out ulong lpTotalNumberOfFreeBytes);
// import from kernel32.dll function GetDiskFreeSpaceEx
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
[return: MarshalAs(UnmanagedType.Bool)]
internal static extern bool GetDiskFreeSpace(ulong GetDiskFreeSpace, out ulong lpSectorsPerCluster, out ulong lpBytesPerSector, out ulong lpNumberOfFreeClusters, out ulong lpTotalNumberOfClusters);
}
}
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