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8.4

Handling events thrown by using Reflection

Asked by Ready1 in C# Programming Language

Tags: reflection, event, using

I have a class that is instantiated dynamically using reflection. This is class inherits from a base class that contains the event handler. There could be 10 or more classes that inherits from this base class.

How can I subscribe to the event of a class that is created using reflection. Each of the class can be instantiated at any time but they all trigger the same event which is called OnOutputCreated. I want to subscribe to that event at the point i instantiate the class.

this is how i invoke the class using reflection i can invoke methods i just cant subscribe to its events.

                              Assembly cmdAssembly = Assembly.LoadFrom(script);
                              try
                              {
                                    // We need to use reflection to use the correct handler
                                    string cmdType = "CCScript."+clRow.CmdDLL.Substring(0,clRow.CmdDLL.Length-4);
                                    System.Type theType = cmdAssembly.GetType(cmdType);

                                    if(theType != null &&
                                          theType.GetInterface ("Commander.IUI") != null &&
                                          theType.GetInterface ("Commander.INonUI") != null
                                          )
                                    {

                                          // subscribe to the OutputCreated event handler

                                          // create the constructor arguments
                                          object[] args = {cmd};

                                          // create the messageHandler object
                                          object msgHandler = Activator.CreateInstance(theType);

                                          // invoke the ExecuteCommand method of the handler
                                          theType.InvokeMember ("ExecuteCommand",
                                                BindingFlags.Default | BindingFlags.InvokeMethod,
                                                null,
                                                msgHandler,
                                                args);
                                    }
                              }
                              catch(Exception ex)
                              {
                                    // there is a problem
                                    returnCode = -1;
                              }

Regards,
Ready1
[+][-]08/06/06 09:22 PM, ID: 17261268Accepted Solution

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About this solution

Zone: C# Programming Language
Tags: reflection, event, using
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Solution Provided By: _Katka_
Participating Experts: 3
Solution Grade: A
 
[+][-]08/06/06 06:36 AM, ID: 17258826Expert Comment

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[+][-]08/06/06 07:10 AM, ID: 17258898Author Comment

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[+][-]08/06/06 11:18 AM, ID: 17259598Expert Comment

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[+][-]08/06/06 11:21 AM, ID: 17259608Expert Comment

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[+][-]08/06/06 05:53 PM, ID: 17260744Author Comment

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[+][-]08/06/06 09:28 PM, ID: 17261287Author Comment

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[+][-]08/06/06 09:40 PM, ID: 17261324Expert Comment

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