Overriding Records per page count for Microsoft Dynamics CRM 4.0

I've decided to use idea and code from one of my previous posts.

Idea:
1. Add field to user entity which will contain count of records to show.
2. Replace system-defined count of records with value from 1 trough catching and handling Execute message.

Field:





Code of the plugin:

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Crm.Sdk;
using System.Xml;
using Microsoft.Crm.SdkTypeProxy;
using Microsoft.Crm.Sdk.Query;

namespace RecordPerPage
{
    public class RecordCounterExtender : IPlugin
    {
        #region IPlugin Members

        public void Execute(IPluginExecutionContext context)
        {
            if (context.MessageName == "Execute" && context.InputParameters.Contains("FetchXml"))
            {
                //I create a crmservice instance
                ICrmService crmservice = context.CreateCrmService(true);
                
                //I form a query to retrieve field with count of records
                TargetRetrieveDynamic target = new TargetRetrieveDynamic();
                target.EntityId = context.UserId;
                target.EntityName = EntityName.systemuser.ToString();
                
                RetrieveRequest request = new RetrieveRequest();
                request.ColumnSet = new ColumnSet(new string[] { "new_recordscount" });
                request.Target = target;
                request.ReturnDynamicEntities = true;
                
                //I retrieve field
                DynamicEntity currentuser = (DynamicEntity)((RetrieveResponse)crmservice.Execute(request)).BusinessEntity;
                
                //If the field is empty it would not be in response
                //and this must be handled
                if (currentuser.Properties.Contains("new_recordscount"))
                {
                    //I create document to manipulate request query
                    XmlDocument indoc = new XmlDocument();
                    indoc.LoadXml((string)context.InputParameters["FetchXml"]);
                    
                    //There can not be such attribute
                    //and this must be handled
                    if (indoc.DocumentElement.Attributes["count"] != null)
                    {
                        //I replace standard value with field from user form
                        indoc.DocumentElement.Attributes["count"].Value = ((CrmNumber)currentuser["new_recordscount"]).Value.ToString();
                        //and return modified request to the context
                        context.InputParameters["FetchXml"] = indoc.OuterXml;
                    }
                }
            }
        }

        #endregion    
    }
}

Step registration:



Demonstration:






And source code and customization: