C # compile COM components and call them in Silverlight

C # compile COM components

1. Create a Windows class library ApplicationProgramIn the assemblyinfo file of the properties directory, set comvisible (false) to comvisible (true ).

2. Select register for com InterOP in the Project Properties and build option.

3. Compile comCode(Sensorevents defines the event interface ).

As follows:

Code

  Namespace  Imdcom
{
  ///     <Summary>  
 ///  Event Interface
  ///     </Summary>  
  [Interfacetype (cominterfacetype. interfaceisidispatch)]
  Public     Interface  Icomevents
{
  ///     <Summary>  
  /// Define the event to be exposed
  ///     </Summary>  
    Void  Onhellobegin (  Object  Sender, eventargs E );
}

  Public     Class  Helloevents: eventargs
{}

  ///    <Summary>  
  ///  Custom Delegation
  ///     </Summary>  
    Public     Delegate     Void  Comdel (  Object Sender, eventargs E );

[Comvisible (  True  )]
[Comsourceinterfaces (  Typeof  (Icomevents)]
  Public     Class  Imdcomtest
{
  Public     String  Hello ()
{
  If  (Onhellobegin ! =  Null  )
Onhellobegin (  This  ,  New  Helloevents ());
  Return     "  Asdasdasd  "  ;
}

  ///     <Summary>  
 ///  Implement event interfaces
  ///     </Summary>  
    Public     Event  Comdel onhellobegin;
}
} 

4. Compile the DLL and use the command c: \ windows \ Microsoft. NET \ framework \ v4.0.30319 \ regasm.exe sensorscom. DLL to register COM.

Now C # Write COM is OK!

Call COM in Silverlight

1. Set the Silverlight program to the highest permission in OOB mode. Otherwise, Silverlight cannot call COM.

2. Call Code

As follows:

Code

  Using  (Dynamic imdcom  =  Automationfactory. Createobject (  "  Imdcom. imdcomtest  "  ))
{
Automationevent Eve  =  Automationfactory. getevent (imdcom, "  Onhellobegin  "  );
Eve. eventraised  + =  New  Eventhandler  <  Automationeventargs  >  (S, E1)  =>  {
MessageBox. Show (e1.arguments [  0 ]. Tostring ());
});

Dynamic sensorlist  =  Imdcom. Hello ();
MessageBox. Show (sensorlist );
}