How To Get File Icon(CSharp)

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TOPIC: How To Get File Icon(CSharp)

How To Get File Icon(CSharp) 29 Jun 2010 21:26 #379

Introduction
In this article we will see how to Get File Icon.

Let’s get started:
Step 1:Start Visual studio and create a new Windows Forms Application
Step 2: Add Button,PictureBox and lable Control in Form
Step 3:Right Click the project and add a ‘Class’ , Rename Class To "GetFileIcon" and follow code's:

        public const uint SHGFI_ICON = 0x100;
        public const uint SHGFI_LARGEICON = 0x0; //Larg Icon
        public const uint SHGFI_SMALLICON = 0x1; //Small icon
 
        [DllImport("shell32.dll")]
        public static extern IntPtr SHGetFileInfo(String pszpath,
            uint dwFileAttibutes,
            ref SHFILEINFO psfi,
            uint cbSizeFileInfo,
            uint uFlags);
 
        [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;
        }
        //
        //Get larg Icon
        //
        public static System.Drawing.Icon GetLargIcon(String filename)
        {
            SHFILEINFO shinfo = new SHFILEINFO();
            IntPtr hImagelarg = SHGetFileInfo(filename, 0, ref shinfo,
                (uint)Marshal.SizeOf(shinfo),
                GetFileIcon.SHGFI_ICON | GetFileIcon.SHGFI_LARGEICON);
            return System.Drawing.Icon.FromHandle(shinfo.hIcon);
        }
 
        //
        //Get Small Icon
        //
        public static System.Drawing.Icon GetSmallIcon(String filename)
        {
            SHFILEINFO shinfo = new SHFILEINFO();
            IntPtr hImagesmall = SHGetFileInfo(filename, 0, ref shinfo,
                (uint)Marshal.SizeOf(shinfo), GetFileIcon.SHGFI_ICON|
                GetFileIcon.SHGFI_SMALLICON);
            return System.Drawing.Icon.FromHandle(shinfo.hIcon);
        }

Step 4: Add the following code to the Button’s Click Event

   using (OpenFileDialog op = new OpenFileDialog())
            {
                if (op.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {
                    System.Drawing.Icon icon = GetFileIcon.GetLargIcon(op.FileName);
                    this.piclargicon.Image = (Image)icon.ToBitmap();
                    this.label1.Text = GetFileIcon.GetLargIcon(op.FileName).Width +
                        " X " +
                        GetFileIcon.GetLargIcon(op.FileName).Height;
                }
            }

5. Run project.

APPLIES TO

Microsoft Visual C# .NET 2002 Standard Edition
Microsoft Visual C# 2005 Express Edition
Microsoft Visual C# 2008 Express Edition
Microsoft Visual C# 2010 Express Edition

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