模块通信在DNN中不起作用

Question

I am using DNN6 and i creted two modules and tried to connect between them using module communicator, here is my code:

#region IntermoduleCommunication
ModuleCommunicationEventArgs oArgs = new ModuleCommunicationEventArgs();
oArgs.Value = Session["ShoppingCart"];
if (ModuleCommunication != null)
 ModuleCommunication(this, oArgs);
#endregion

but i am getting 'null' in the ModuleCommunication variable?

Answer 1

Are you wrapping the modules in an update panel, (have the supports partial rendering option enabled) in the DNN manifest?

If I recall correctly, IMC won't work via UpdatePanels.

Answer 2

From whatever code you have provided, it should work. In order to get help you need to provide code for both IModuleCommunicator and IModuleListener implementation. But you can review Example implementation here . Let me know if you need more help.

Also if you are not using latest version of dnn, please try testing it by creating of latest dnn instance. Let me know if you need more help.

Answer 3

The answer here is simple, you've forgotten exactly how events work, they are just like any other object, you have to instantiate them. aka.

public event ModuleCommunicationEventHandler ModuleCommunication = new ModuleCommunicationEventHandler(SomeStaticMethodThatWillBeCalledByDefault);

Answer 4

To get this working you need to implement the IModuleCommunicator interface. Right click on the IModuleCommunicator as showed below and extract the interface.

public partial class MyClass: PortalModuleBase, IModuleCommunicator

once extracted the following will be generated

 public event ModuleCommunicationEventHandler ModuleCommunication;

I call it from a button click event

protected void btn1_Click(Object sender, EventArgs e)
        {
    if (ModuleCommunication == null) return;

                ModuleCommunicationEventArgs args = new ModuleCommunicationEventArgs();
                args.Sender = this.GetType().ToString(); ;
                args.Target = "MyTarget";

}

wrap the whole thing in a try catch block to catch exceptions......hope this helps