C#でアイコン取得(フォルダ)

やりたいこと

フォルダやドライブのアイコンを取得したいと思い、

ググってたところ、こちらのページにたどりつきました。

http://support.microsoft.com/kb/319350/ja

記載の通りに書いたところアイコンがとれました。

こんなのができる。

コード

参考のページの通りに書いてみたもの。

view plainprint?

1. using System;  
2. using System.Collections.Generic;  
3. using System.ComponentModel;  
4. using System.Data;  
5. using System.Drawing;  
6. using System.Text;  
7. using System.Windows.Forms;  
8. using System.Runtime.InteropServices;  
9.   
10. namespace GetIconSample  
11. {  
12.     public partial class Form1 : Form  
13.     {  
14.         private int nIndex = 0;  
15.   
16.         public Form1()  
17.         {  
18.             InitializeComponent();  
19.         }  
20.   
21.         private void button1_Click(object sender, EventArgs e)  
22.         {  
23.             IntPtr hImgSmall; //the handle to the system image list  
24.             IntPtr hImgLarge; //the handle to the system image list  
25.             string fName; //  'the file name to get icon from  
26.             SHFILEINFO shinfo = new SHFILEINFO();  
27.   
28.             OpenFileDialog openFileDialog1 = new OpenFileDialog();  
29.             openFileDialog1.InitialDirectory = "c:\\temp\\";  
30.             openFileDialog1.Filter = "All files (*.*)|*.*";  
31.             openFileDialog1.FilterIndex = 2;  
32.             openFileDialog1.RestoreDirectory = true;  
33.   
34.             listView1.SmallImageList = imageList1;  
35.             listView1.LargeImageList = imageList1;  
36.   
37.             if (openFileDialog1.ShowDialog() == DialogResult.OK)  
38.             {  
39.                 fName = openFileDialog1.FileName;  
40.                 //Use this to get the small Icon  
41.                 hImgSmall = Win32.SHGetFileInfo(fName, 0, ref shinfo, (uint)Marshal.SizeOf(shinfo), Win32.SHGFI_ICON | Win32.SHGFI_SMALLICON);  
42.   
43.                 //Use this to get the large Icon  
44.                 //hImgLarge = Win32.SHGetFileInfo(fName, 0,   
45.                 //    ref shinfo, (uint)Marshal.SizeOf(shinfo),   
46.                 //    Win32.SHGFI_ICON | Win32.SHGFI_LARGEICON);  
47.   
48.                 //The icon is returned in the hIcon member of the shinfo struct  
49.                 System.Drawing.Icon myIcon = System.Drawing.Icon.FromHandle(shinfo.hIcon);  
50.   
51.                 imageList1.Images.Add(myIcon);  
52.   
53.                 //Add file name and icon to listview  
54.                 listView1.Items.Add(fName, nIndex++);  
55.             }  
56.         }  
57.     }  
58.   
59.     [StructLayout(LayoutKind.Sequential)]  
60.     public struct SHFILEINFO  
61.     {  
62.         public IntPtr hIcon;  
63.         public IntPtr iIcon;  
64.         public uint dwAttributes;  
65.         [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]  
66.         public string szDisplayName;  
67.         [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]  
68.         public string szTypeName;  
69.     };  
70.   
71.     class Win32  
72.     {  
73.         public const uint SHGFI_ICON = 0x100;  
74.         public const uint SHGFI_LARGEICON = 0x0; // 'Large icon  
75.         public const uint SHGFI_SMALLICON = 0x1; // 'Small icon  
76.   
77.         [DllImport("shell32.dll")]  
78.         public static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbSizeFileInfo, uint uFlags);  
79.     }  
80. }  

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace GetIconSample
{
    public partial class Form1 : Form
    {
        private int nIndex = 0;

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            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 = Win32.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++);
            }
        }
    }

    [StructLayout(LayoutKind.Sequential)]
    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);
    }
}