Dynamics CRM Trigger plugin for N:N relationships

      博客原文：https://demystifyingcrm.wordpress.com/2014/12/17/trigger-plugin-for-nn-relationships-in-dynamics-crm/

wordpress在国内访问有点困难，怎么访问作为技术的你应该懂的

    下面分享个我的示例，有助于你的理解，parameters总共有3个，Relationship(用来表示当前n:n关系的关系名称，见下面截图)，Target和RelatedEntities分别对应的是两个实体，具体的还是看下面的代码就好

 public void Execute(IServiceProvider serviceProvider)
        {
            IPluginExecutionContext context = (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext));
            IOrganizationServiceFactory factory = (IOrganizationServiceFactory)serviceProvider.GetService(typeof(IOrganizationServiceFactory));
            IOrganizationService service = factory.CreateOrganizationService(context.UserId);
            if (context.MessageName == "Associate")
            {
                if (context.Depth > 1)
                {
                    return;
                }
                Relationship entityRelationShip = (Relationship)context.InputParameters["Relationship"];
                if (entityRelationShip.SchemaName == "ubg_branch_product")//产品与分公司N:N的关联
                {
                    EntityReferenceCollection RelatedEntity = (EntityReferenceCollection)context.InputParameters["RelatedEntities"];
                    Entity product = service.Retrieve(RelatedEntity[0].LogicalName, RelatedEntity[0].Id, new ColumnSet("ubg_approvestate"));
                    if (product.Attributes.Contains("ubg_approvestate") && ((OptionSetValue)product["ubg_approvestate"]).Value != 1)
                    {
                        throw new InvalidPluginExecutionException("非草稿状态的产品不允许关联分公司!");
                    }
                }
                if (entityRelationShip.SchemaName == "ubg_product_ubg_datalist")//产品与资料列表N:N的关联
                {
                    EntityReference TargetEntity = (EntityReference)context.InputParameters["Target"];
                    Entity product = service.Retrieve(TargetEntity.LogicalName, TargetEntity.Id, new ColumnSet("ubg_approvestate"));
                    if (product.Attributes.Contains("ubg_approvestate") && ((OptionSetValue)product["ubg_approvestate"]).Value != 1)
                    {
                        throw new InvalidPluginExecutionException("非草稿状态的产品不允许资料!");
                    }
                }
            }
        }

    为了方便那些确实没办法访问wordpress的，我这里把注册的图也给贴出来