I have seen a few examples of how to handle associate/disassociate messages in the plugins, and I have done it myself multiple times; however, some of those examples don’t work as is, and, more often than not, I have to spend more time than I’d like to on this kind of plugins.
The code below is fresh from the Visual Studio, having been tested in CRM 2013 just now (yes, it is not the latest version.. keep that in mind if something there does not work when you copy-paste it to your plugin and try to use for CRM 2015/2016).
Once the code has been compiled, use PluginRegistrationTool to register the plugin and to create a step for “Associate” and/or for “Disassociate” messages. You won’t be able to define an entity for those messages, so it’s important to verify the name of the relationships in the plugin code before doing anything else.
public class AssociateDisassociate : IPlugin
{
public void Execute(IServiceProvider serviceProvider)
{
IPluginExecutionContext context = (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext));
if (context.MessageName == “Associate” || context.MessageName == “Disassociate”)
{
if (context.InputParameters.Contains(“Relationship”))
{
Relationship rel = (Relationship)context.InputParameters[“Relationship”];
if (rel.SchemaName != “{RELATIONSHIP NAME}”)
{
return;
}
if (context.InputParameters.Contains(“Target”) && context.InputParameters[“Target”] is EntityReference)
{
targetEntity = (EntityReference)context.InputParameters[“Target”];
if (context.InputParameters.Contains(“RelatedEntities”) && context.InputParameters[“RelatedEntities”] is EntityReferenceCollection)
{
relatedEntities = context.InputParameters[“RelatedEntities”] as EntityReferenceCollection;
relatedEntity = relatedEntities[0];
}
//check both relatedEntity and targetEntity – they might switch sides depending on what message is being handled and from where it came from
}
}
}
}
}
targetEntity = (EntityReference)context.InputParameters[“Target”];
In the above code, is that possible to retrieve the targetEntity Id. I tried your code and getting the Entity Logical Name but i can get the Id of the record.
targetEntity = (EntityReference)context.InputParameters[“Target”];
I cant able to reterive the targetEntity Id, though i get the logical name of the entity.
targetEntity.Id should give you the id. Do you mean you are getting an empty guid for some reason?
What will be target entity and what will be related entity in N:N relationship?? Is it message dependent?? Or CRM configuration??
It’s neither message dependent nor configuration. What you have to do in the plugin is check the relationship name, and, if it’s the one you are interested in, check what’s in the target and what’s in the RelatedEntities. They may switch sides depending on where and how the user is associating the entities. Not sure if that was the question or if you are asking about how N:N work in general?
Hi ,
If we associate multiple records at a time with an entity A and there is a plugin on Association. Does that mean the plugin will have multiple instances running at the same time because of multiple records selected for the association ?
Hi, it should be one plugin run per “associate request” (https://docs.microsoft.com/en-us/dotnet/api/microsoft.xrm.sdk.messages.associaterequest?view=dynamics-general-ce-9)
Thanks Alex!
Hi,
If we need to filter the related entity records based on target entity Id, then how can we do that? It would be really helpful if you can share a code snippet for same.