Ricavare l’icona di sistema dato il percorso di un file

ImageList imageList1 = new ImageList();

IntPtr hImgSmall; //the handle to the system image list

IntPtr hImgLarge; //the handle to the system image list

string fName; // 'the file name to get icon from

SHFILEINFO shinfo = new SHFILEINFO();

OpenFileDialog openFileDialog1 = new OpenFileDialog();

openFileDialog1.InitialDirectory = "c:\\temp\\";

openFileDialog1.Filter = "All files (*.*)|*.*";

openFileDialog1.FilterIndex = 2;

openFileDialog1.RestoreDirectory = true;

            listView1.SmallImageList = imageList1;

listView1.LargeImageList = imageList1;

if (openFileDialog1.ShowDialog() == DialogResult.OK)

{

fName = openFileDialog1.Filename;

//Use this to get the small Icon

hImgSmall = Win32.SHGetFileInfo(fName, 0, ref shinfo,

(uint)Marshal.SizeOf(shinfo),

Win32.SHGFI_ICON |

Win32.SHGFI_SMALLICON);

//Use this to get the large Icon

//hImgLarge = SHGetFileInfo(fName, 0,

//ref shinfo, (uint)Marshal.SizeOf(shinfo),

//Win32.SHGFI_ICON | Win32.SHGFI_LARGEICON);

//The icon is returned in the hIcon member of the shinfo

//struct

System.Drawing.Icon myIcon =

System.Drawing.Icon.FromHandle(shinfo.hIcon);

imageList1.Images.Add(myIcon);

//Add file name and icon to listview

ListView1.Items.Add(fName, nIndex++);

}

public struct SHFILEINFO

{

public IntPtr hIcon;

public IntPtr iIcon;

public uint dwAttributes;

[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]

public string szDisplayName;

[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]

public string szTypeName;

};

class Win32

{

public const uint SHGFI_ICON = 0x100;

public const uint SHGFI_LARGEICON = 0x0; // 'Large icon

public const uint SHGFI_SMALLICON = 0x1; // 'Small icon

[DllImport("shell32.dll")]

public static extern IntPtr SHGetFileInfo(string pszPath,

uint dwFileAttributes,

ref SHFILEINFO psfi,

uint cbSizeFileInfo,

uint uFlags);

}