How Can I Create My C# Com Class From JavaScript Using ActiveXObject

Question

I wrote C# class to COM but I could not use it from JavaScript. Example

[ComVisible(true)]
[ClassInterface(ClassInterfaceType.None)]
[ComSourceInterfaces(typeof(ICommandsEvents))]
[ProgId("Scripting.Commands")]
public class Commands : ICommands
{
    public Commands()
    {

    }
    public int CreateChannel(string channelName)
    {
        return 0;
    }

    public int GetChannelID(string channelName)
    {
        return CreateChannel(channelName);
    }

     public event ChannelEventsHandler OnChannelEvents;
}

[ComVisible(false)]
public delegate void ChannelEventsHandler(string a);

[ComVisible(true)]
[Guid("E2147768-8BA8-400b-8602-A1FDC31E6AA5")]
[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
public interface ICommands
{
    [DispId(5)]
    int CreateChannel(string channelName);

    [DispId(6)]
    int GetChannelID(string channelName);
}

[ComVisible(true)]
[Guid("22316373-A8DF-4ace-B48C-EA9953BD73FF")]
[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
public interface ICommandsEvents
{
    [DispId(1)]
    void OnChannelEvents(string a);
}

and I checked "Register for COM interop" checkbox of project property.

when I want to Create this from JavaScript like this.

var a = ActiveXObject("Scripting.Commands");

I am getting "Automation Server Can't create object" exception. What is my wrong.

Thank you

Richard · Accepted Answer · 2009-07-04 10:11:39Z

1

There are a large number of reasons for this kind of error.

Ensure you have an assembly level GuidAttribute for the type library
First check the registry that interface, type library and coclass registration are correct.
Use Process Monitor to check the registration is being read correctly.
Attach a debugger to the process, so you can add breakpoints to your code.
Does a C# client (using COM, so you'll need to import tge typelib to create a PIA) work?

But I notice your class does not have a GuidAttribute, so coclass registration will have failed.

answered Jul 4, 2009 at 10:11

Richard

110k21 gold badges214 silver badges279 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Petey B · Accepted Answer · 2010-09-02 14:59:10Z

0

Make sure that your site is in 'Trusted Sites' on the client's machine.

answered Sep 2, 2010 at 14:59

Petey B

11.6k27 gold badges84 silver badges102 bronze badges

Collectives™ on Stack Overflow

How Can I Create My C# Com Class From JavaScript Using ActiveXObject

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related