CDS Calculate Rollup

CdsCalculateRollup.cs

using System;
using System.ServiceModel;
using Microsoft.Crm.Sdk.Messages;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Query;

namespace QuotationCalculateSum
{
    public class CalculatorPlugin : IPlugin
    {
        public void Execute(IServiceProvider serviceProvider)
        {
            // Obtain the tracing service
            ITracingService tracingService =
            (ITracingService)serviceProvider.GetService(typeof(ITracingService));

            // Obtain the execution context from the service provider.  
            IPluginExecutionContext context = (IPluginExecutionContext)
                serviceProvider.GetService(typeof(IPluginExecutionContext));

            tracingService.Trace("test");
            // The InputParameters collection contains all the data passed in the message request.  
            if (context.InputParameters.Contains("Target") &&
                context.InputParameters["Target"] is Entity)
            {

                // Obtain the target entity from the input parameters.  
                Entity entity = (Entity)context.InputParameters["Target"];

                // Obtain the organization service reference which you will need for  
                // web service calls.  
                IOrganizationServiceFactory serviceFactory =
                    (IOrganizationServiceFactory)serviceProvider.GetService(typeof(IOrganizationServiceFactory));
                IOrganizationService service = serviceFactory.CreateOrganizationService(context.UserId);

                entity = service.Retrieve(entity.LogicalName, entity.Id, new ColumnSet("hx_parent_quote"));
            
                try
                {

                    var quoteRef = entity.GetAttributeValue<EntityReference>("hx_parent_quote");
                    // Entity quote = null;
                    if (quoteRef != null)
                    {
                        // quote = service.Retrieve(quoteRef.LogicalName, quoteRef.Id, new ColumnSet("hx_quote_total"));

                        var crfrRequested = new CalculateRollupFieldRequest
                        {
                            Target = new EntityReference(quoteRef.LogicalName, quoteRef.Id),
                            FieldName = "hx_quote_total"
                        };

                        var responseRequested = (CalculateRollupFieldResponse)service.Execute(crfrRequested);

                        tracingService.Trace("New Rollupfield Value = " + responseRequested.Entity.GetAttributeValue<decimal>("hx_parent_quote"));
                    }

                }

                catch (FaultException<OrganizationServiceFault> ex)
                {
                    throw new InvalidPluginExecutionException("An error occurred in FollowUpPlugin.", ex);
                }

                catch (Exception ex)
                {
                    tracingService.Trace("FollowUpPlugin: {0}", ex.ToString());
                    throw;
                }
            }
        }

    }

}