Register a COM DLL programatically in c# without Administrator previlege....

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Hi All,

I have a COM DLL which has to be registered at run time when my application starts.

I have used the below code...

C++

Assembly asm = Assembly.LoadFile (@"D:Test\TestCOM.dll");
RegistrationServices regAsm = new RegistrationServices();
bool bResult = regAsm.RegisterAssembly(asm, AssemblyRegistrationFlags.SetCodeBase);

The problem is, It is getting registered when the user is a power user or administrator. Its not getting register in registry when the user have a normal user previlege.

Any other way to register the COM DLL with the normal user previlege in runtime through c#?

Thanks in advance..
Mydeen.

Posted 22-Mar-10 21:15pm

PeerMohamedMydeen

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Christian Graus · Answer 1 · 2010-03-22T21:16:00

You could try to run regsvr32, but I suspect you'll find you'll have the same issue. Given that a non admin is often limited in access to the registry, I suspect you will find you need your user to log in as admin to install your program because you used COM. There is no reason to use COM for your C# dlls, unless you need them to work with other languages.

Eugen Podsypalnikov · Answer 2 · 2010-03-22T21:29:00

Solution 2

A service started by user SYSTEM
could perform such tasks for its "non SYSTEM" clients... :)

Posted 22-Mar-10 21:29pm

Eugen Podsypalnikov

x-fuego · Answer 3 · 2015-05-04T02:37:00

My simple solution works with some restrictions. Do not calls methods marked by [ComRegisterFunction]. Also works only for "Any CPU" assemlies.

C#

Assembly assembly = Assembly.LoadFile("drive:\\my.dll");
Type[] Types = assembly.GetExportedTypes();

foreach (Type type in Types)
{
    ComVisibleAttribute[] attributes = (ComVisibleAttribute[])type.GetCustomAttributes(typeof(ComVisibleAttribute), false);

    if (attributes.Length > 0 && attributes[0].Value)
    {
        Register(type);
    }

}

C#

static void Register(Type type)
{
    string ProgID = type.FullName;
    string Version = type.Assembly.GetName().Version.ToString();
    string GUIDstr = "{" + type.GUID.ToString() + "}";
    string keyPath = @"Software\Classes\";


    RegistryKey regularx86View = RegistryKey.OpenBaseKey(RegistryHive.CurrentUser, RegistryView.Registry32);

    RegistryKey regularx64View = RegistryKey.OpenBaseKey(RegistryHive.CurrentUser, RegistryView.Registry64);
 
    RegistryKey[] keys = {regularx86View.OpenSubKey(keyPath, RegistryKeyPermissionCheck.ReadWriteSubTree, System.Security.AccessControl.RegistryRights.FullControl),
                    regularx64View.OpenSubKey(keyPath, RegistryKeyPermissionCheck.ReadWriteSubTree, System.Security.AccessControl.RegistryRights.FullControl)};

            
    ProgIdAttribute[] attributes = (ProgIdAttribute[])type.GetCustomAttributes(typeof(ProgIdAttribute), false);

    if (attributes.Length > 0)
        ProgID = attributes[0].Value;

    foreach(RegistryKey RootKey in keys)
    {
        //[HKEY_CURRENT_USER\Software\Classes\Prog.ID]
        //@="Namespace.Class"
                
        RegistryKey keyProgID = RootKey.CreateSubKey(ProgID);
        keyProgID.SetValue(null, type.FullName);

        //[HKEY_CURRENT_USER\Software\Classes\Prog.ID\CLSID]
        //@="{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}"
        keyProgID.CreateSubKey(@"CLSID").SetValue(null, GUIDstr);


        //[HKEY_CURRENT_USER\Software\Classes\CLSID\{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}]
        //@="Namespace.Class
        //
        RegistryKey keyCLSID = RootKey.OpenSubKey(@"CLSID", RegistryKeyPermissionCheck.ReadWriteSubTree, System.Security.AccessControl.RegistryRights.FullControl).CreateSubKey(GUIDstr);
        keyCLSID.SetValue(null, type.FullName);


        //[HKEY_CURRENT_USER\Software\Classes\CLSID\{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}\ProgId]
        //@="Prog.ID"
        keyCLSID.CreateSubKey("ProgId").SetValue(null, ProgID);


        //[HKEY_CURRENT_USER\Software\Classes\CLSID\{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}\InprocServer32]
        //@="mscoree.dll"
        //"ThreadingModel"="Both"
        //"Class"="Namespace.Class"
        //"Assembly"="AssemblyName, Version=1.0.0.0, Culture=neutral, PublicKeyToken=71c72075855a359a"
        //"RuntimeVersion"="v4.0.30319"
        //"CodeBase"="file:///Drive:/Full/Image/Path/file.dll"
        RegistryKey InprocServer32 = keyCLSID.CreateSubKey("InprocServer32");
        SetInprocServer(InprocServer32, type, false);

        //[HKEY_CURRENT_USER\Software\Classes\CLSID\{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}\InprocServer32\1.0.0.0]
        //"Class"="Namespace.Class"
        //"Assembly"="AssemblyName, Version=1.0.0.0, Culture=neutral, PublicKeyToken=71c72075855a359a"
        //"RuntimeVersion"="v4.0.30319"
        //"CodeBase"="file:///Drive:/Full/Image/Path/file.dll"
        SetInprocServer(InprocServer32.CreateSubKey("Version"), type, true);

        //[HKEY_CURRENT_USER\Software\Classes\CLSID\{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}\Implemented Categories\{62C8FE65-4EBB-45E7-B440-6E39B2CDBF29}]
        keyCLSID.CreateSubKey(@"Implemented Categories\{62C8FE65-4EBB-45E7-B440-6E39B2CDBF29}");

        keyCLSID.Close();
    }

}

C#

static void SetInprocServer(RegistryKey key, Type type, bool versionNode)
{

    if (!versionNode)
    {
        key.SetValue(null, "mscoree.dll");
        key.SetValue("ThreadingModel", "Both");
    }

    key.SetValue("Class", type.FullName);
    key.SetValue("Assembly", type.Assembly.FullName);
    key.SetValue("RuntimeVersion", type.Assembly.ImageRuntimeVersion);
    key.SetValue("CodeBase", type.Assembly.CodeBase);
}

Register a COM DLL programatically in c# without Administrator previlege....

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