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.NET Shell Extensions - Shell Drop Handlers

, 19 Jan 2013 CPOL
Rapidly create Shell Drop Handler Extensions using .NET
SharpShell.dll
SharpShell Source Code
Dependencies
Apex
Apex.WinForms.dll
SharpShell
packages
Apex.1.5.0
Apex.1.5.0.nupkg
lib
net35
Apex.dll
net40
Apex.dll
sl30
Apex.Silverlight.dll
sl3-wp
Apex.WP7.dll
sl40
Apex.Silverlight4.dll
sl4-wp71
Apex.WP7.dll
sl50
Apex.Silverlight.dll
NUnit.2.6.2
lib
nunit.framework.dll
NUnit.2.6.2.nupkg
Samples
ContextMenu
CountLinesExtension
CountLinesExtension.csproj.vspscc
Key.snk
Properties
Resources
CountLines.bmp
DropHandler
XsdDropHandler
ExampleFiles
Key.snk
Properties
XsdDropHandler.csproj.vspscc
IconHandler
DllIconHandler
DllIconHandler.csproj.vspscc
Key.snk
Properties
Resources
ManagedDll.ico
NativeDll.ico
IconOverlayHandler
ReadOnlyFileIconOverlayHandler
Key.snk
Properties
ReadOnlyFileIconOverlayHandler.csproj.vspscc
Resources
ReadOnly.ico
InfoTipHandler
FolderInfoTipHandler
FolderInfoTipHandler.csproj.vspscc
Key.snk
Properties
PropertySheet
DrivePropertySheet
DrivePropertySheet.csproj.vspscc
Key.snk
Properties
TextFilePropertySheet
Key.snk
Properties
TextFilePropertySheet.csproj.vspscc
SharpShell
Attributes
Diagnostics
Extensions
Interop
Key.snk
NativeBridge
SharpShellNativeBridge32.dll
SharpShellNativeBridge64.dll
Properties
ServerRegistration
SharpContextMenu
SharpDropHandler
SharpIconHandler
SharpIconOverlayHandler
SharpInfoTipHandler
SharpPropertySheet
SharpShell.csproj.vspscc
SharpShellNativeBridge
SharpShellNativeBridge.vcxproj.filters
SharpShellNativeBridge.vcxproj.user
SharpShellNativeBridge.vcxproj.vspscc
Tools
ServerInspector
Properties
ServerInspector.csproj.vspscc
Servers
ServerManager
About
LogView
Properties
Resources
ChangeYourView.png
ContextMenu.png
Icon.png
openHS.png
PlayHS.png
PropertySheet.png
View_Details.png
View_LargeIcons.png
View_List.png
View_SmallIcons.png
View_Tiles.png
ServerDetails
ServerManager.csproj.vspscc
SharpShell.ico
TestShell
ShellExtensionManager
Properties
ShellExtensionManager.csproj.vspscc
SharpShell Tools
Apex.dll
Apex.WinForms.dll
ServerInspector.exe
ServerManager.exe
SharpShell.dll
System.Windows.Interactivity.dll
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using SharpShell.Attributes;
using SharpShell.Diagnostics;
using SharpShell.SharpIconHandler;

namespace DllIconHandler
{
    /// <summary>
    /// The DllIconHandler is a Shell Icon Handler exception that
    /// shows different icons for native and managed dlls.
    /// </summary>
    [ComVisible(true)]
    [COMServerAssociation(AssociationType.ClassOfExtension, ".dll")]
    public class DllIconHandler : SharpIconHandler
    {
        /// <summary>
        /// Gets the icon.
        /// </summary>
        /// <param name="smallIcon">if set to <c>true</c> provide a small icon.</param>
        /// <param name="iconSize">Size of the icon.</param>
        /// <returns>
        /// The icon for the file.
        /// </returns>
        protected override Icon GetIcon(bool smallIcon, uint iconSize)
        {
            //  The icon we'll return.
            Icon icon = null;

            //  Check the assembly name. If it's a native dll, this'll throw an exception.
            try
            {
                //  SelectedItemPath is provided by 'SharpIconHandlder' and contains the path of the file.
                AssemblyName.GetAssemblyName(SelectedItemPath);
            }
            catch (BadImageFormatException)
            {
                //  The file is not an assembly.
                icon = Properties.Resources.NativeDll;
            }
            catch (Exception)
            {
                //  Some other eception occured, so assume we're native.
                icon = Properties.Resources.NativeDll;
            }

            //  If we haven't determined that the dll is native, use the managed icon.
            if (icon == null)
                icon = Properties.Resources.ManagedDll;
            
            //  Return the icon with the correct size. Use the SharpIconHandler 'GetIconSpecificSize'
            //  function to extract the icon of the required size.
            return GetIconSpecificSize(icon, new Size((int)iconSize, (int)iconSize));
        }
    }
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Dave Kerr
Software Developer
United Kingdom United Kingdom
Follow my blog at www.dwmkerr.com and find out about my charity at www.childrenshomesnepal.org.

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Web01 | 2.8.170118.1 | Last Updated 19 Jan 2013
Article Copyright 2013 by Dave Kerr
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