Get data from to field in new activity in CRM 2011

Question

I create a new plugin for dynamic CRM 2011 for a costume Activity Entity.

this new activity have "to" field like Email and some other activities.

plugin are working on Create and Update steps for activity.

my problem is when i want to get "to" field value the below line of code return false value and i don't know what i have done. in fact i can fetch other custom field and just the "to" field does not work.

if (entity3.Attributes.Contains("to"))

and this is whole code:

public void Execute(IServiceProvider serviceProvider)
{
    if (serviceProvider == null)
    {
        throw new ArgumentNullException("serviceProvider");
    }

    IPluginExecutionContext context = (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext));
    if (context.InputParameters.Contains("Target") && (context.InputParameters["Target"] is Entity))
    {
            Entity entity2 = (Entity)context.InputParameters["Target"];
            if (entity2.LogicalName == "EntityAtivity")
            {
                QueryExpression expression3 = new QueryExpression("EntityAtivity");
                ColumnSet set2 = new ColumnSet();
                set2.AllColumns = true;
                expression3.ColumnSet = set2;
                ConditionExpression item = new ConditionExpression();
                item.AttributeName = "activityid";
                CurrentGuid = (Guid)entity2.Attributes["activityid"];
                item.Values.Add(this.CurrentGuid);
                FilterExpression expression5 = new FilterExpression();
                expression5.Conditions.Add(item);
                expression3.Criteria = expression5;
                EntityCollection entitys2 = service.RetrieveMultiple(expression3);
                foreach (Entity entity3 in entitys2.Entities)
                {
                    this.dbGuid = (Guid)entity3.Attributes["activityid"];
                    if (entity3.Attributes.Contains("to"))
                    {
                        try
                        {
                            foreach (Entity entity10 in ((EntityCollection)entity3.Attributes["to"]).Entities)
                            {
                                this.dbTo.Add(((EntityReference)entity10.Attributes["partyid"]).LogicalName);
                                this.dbToId.Add(((EntityReference)entity10.Attributes["partyid"]).Id);
                            }
                        }
                        catch (Exception)
                        {
                            this.dbTo.Clear();
                        }
                    }
                } // foreach
            }//if (entity2.LogicalName == "EntityAtivity")
    }//if (context.InputParameters.Contains("Target") && (context.InputParameters["Target"] is Entity))
}

any know what i should done to correct plugin?

EntityAtivity isn't a valid name for the entity. When coding it uses the logical name which is all lower case and starts with your prefix like 'new_'. When retrieving values from the record the plugin is firing on you should use the Target input parameter, or register Pre & Post entity images. — Andy Meyers
EntityActivity is just a sample name. i use preimage but i face new error: Entity preEntity = (Entity)context.PreEntityImages.["PreImage"]; is it correct? — Aqil
The PreImage and PostImage names are registered via the plugin tool. You can choose which images you want, what the name is, and what fields are available in them. — Andy Meyers

Daryl Daryl · Accepted Answer · 2013-11-04T13:17:26

Your question and answer is hard to understand because your English could use some work, but I believe your issue is that you're looking for an attribute in the target of a value that hasn't been set. If an attribute hasn't been set or updated, it will not show up in the target of the the plugin. As @AndyMeyers says, you should use the PreImage and PostImage images to define what attributes you always want to be included in the processing of your plugin.

Get data from to field in new activity in CRM 2011

2 Answers