C#: DLL is registered but COM error 80040154 still appear

问题

When I debug my Windows Form Application I get this error:

Retrieving the COM class factory for component with CLSID {27526253-6119-4B38-A1F9-2DC877E72334} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))

and because of it, my WFA can't interface with the software Solidworks installed on my computer; the only library that WFA needs to interface with Solidworks is SolidWorks.Interop.sldworks.dll (native position in the Solidworks directory C:\Program Files\SOLIDWORKS Corp 2017\SOLIDWORKS\SolidWorks.Interop.sldworks.dll).

Other informations below.

Compiler: Microsoft Visual C# 2010 Express
Operating system: Microsoft Windows 7 64 bit (updated)
Logged account: Administrator
Framework of destination of WFA: Microsoft .NET Framework 4.0 Client Profile
Architecture of WFA: x86 (32 bit)
Architecture of the library: x86 (32 bit)

When I added the library SolidWorks.Interop.sldworks.dll into my project references, through Visual Studio, there wasn't the CLSID

{27526253-6119-4B38-A1F9-2DC877E72334}

into the Windows registry, so I tried to register that library in these ways:

- Pasted SolidWorks.Interop.sldworks.dll into directory C:\Windows\SysWOW64
- Ran Command Prompt as Administrator, than typed C:\Windows\SysWOW64>regsvr32 C:\Windows\SysWOW64\SolidWorks.Interop.sldworks.dll
- Pressed Enter
- Read this message:

The module C:\Windows\SysWOW64\SolidWorks.Interop.sldworks.dll was loaded but the call to DllRegisterServer failed...

So, the library was not registered.

- Pasted SolidWorks.Interop.sldworks.dll into the directory C:\Windows\Microsoft.NET\Framework\v4.0.30319
- Ran Command Prompt as Administrator, than typed C:\Windows\Microsoft.NET\Framework\v4.0.30319>regasm SolidWorks.Interop.sldworks.dll
- Pressed Enter
- Read this message:

The types were registered.

So, I think, now the library is registered, in fact I see the CLSID

{27526253-6119-4B38-A1F9-2DC877E72334}

into the Windows registry.

The problem, however, persists.

In my C# code I created a new Guid; this is the code:

using System;
using System.Diagnostics;
using System.Windows.Forms;
using SolidWorks.Interop.sldworks;

namespace CreateModelSW
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    //Create interface
    SldWorks swApp;

    private void buttonCreateModel_Click(object sender, EventArgs e)
    {
        //Kill Solidworks processes
        Process[] processes = Process.GetProcessesByName("SLDWORKS");
        foreach (Process process in processes)
        {
            process.CloseMainWindow();
            process.Kill();
        }

        //Create new GUID
        Guid myGuid1 = new Guid("27526253-6119-4B38-A1F9-2DC877E72334");
        object processSW = System.Activator.CreateInstance(System.Type.GetTypeFromCLSID(myGuid1));

        //Create new SOLIDWORKS Part
        swApp = (SldWorks)processSW;
        swApp.Visible = true;
        swApp.NewPart();
    }
}
}

The problem persists.

Can you please help me? Thanks.

回答1:

You should be using version agnostic progId, try this :

SldWorks swApp = (SldWorks)Activator.CreateInstance(System.Type.GetTypeFromProgID("SldWorks.Application"));

来源：https://stackoverflow.com/questions/44618287/c-dll-is-registered-but-com-error-80040154-still-appear

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