Working with GAC from code

Posted by on October 25, 2008 · Leave a Comment 

For some day ago I was working on testing an installer that did add some files to the GAC during installation. To ensure that the installer was working correct I needed some code that could check if some files did exist, add files and remove files from the GAC. I did need this for mainly 3 test cases; files already exist in GAC, files are installed correct and repair scenario when some files are deleted. I did find a good API wrapper on Junfena Zhana’s blog that did wrap the needed COM interactions. Based on this wrapper I did create a small class that did solve my problem.

Install assembly example

public static void InstallAssembly(string assemblyPath)
{
  if (String.IsNullOrEmpty(assemblyPath))
  {
    throw new ArgumentNullException("assemblyPath");
  }
 
  AssemblyCache.InstallAssembly(assemblyPath, null, AssemblyCommitFlags.Force);
}

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Working with windows firewall from code

Posted by on October 23, 2008 · Leave a Comment 

Quite recently I did some automation for an installation program that was changing the firewalls rules. So to be able to test that the installation was working as expected I need a way to access information about the firewall from code and also a way to change the information to verify that the installer was able to repair the rules. I found a lot of smaller code snippets mostly in VB on the net with random quality. Since I’m big fan of C# I did decide to create my one snippet’s in C#

The basic functionality is found in the COM object hnetcfg.dll. So the first thing to-do is to get a firewall manager.

private const string CLSIDFireWallManager = "{304CE942-6E39-40D8-943A-B913C40C9CD4}";
private static NetFwTypeLib.INetFwMgr GetFirewallManager()
{
    Type objectType = Type.GetTypeFromCLSID(new Guid(CLSIDFireWallManager));
    INetFwMgr manager = Activator.CreateInstance(objectType) as NetFwTypeLib.INetFwMgr;
    if (manager == null)
    {
        throw new NotSupportedException("Could not load firewall manager");
    }
 
    return manager;
}

Getting the current profile The profile is used for all firewall rules interactions.

private static INetFwProfile GetCurrentProfile()
{
    INetFwProfile profile;
    try
    {
        profile = GetFirewallManager().LocalPolicy.CurrentProfile;
    }
    catch (System.Runtime.InteropServices.COMException e)
    {
        throw new NotSupportedException("Could not get the current profile (COMException)", e);
    }
    catch (System.Runtime.InteropServices.InvalidComObjectException e)
    {
        throw new NotSupportedException("Could not get the current profile (InvalidComObjectException)", e);
    }
 
    return profile;
}

Is firewall on or of?

public static bool IsWindowsFirewallOn
{
    get
    {
        return GetCurrentProfile().FirewallEnabled;                
    }
 
    set
    {
        GetCurrentProfile().FirewallEnabled = value;
    }
}

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My new blog

Posted by on October 20, 2008 · Leave a Comment 

Finally I have reach the point in time when I decided to start blogging. And here is the result.

Filed under Uncategorized · Tagged with