using System;
    using System.IO;
    using System.Xml;
    using Microsoft.Xrm.Sdk;
    using Microsoft.Xrm.Sdk.Query;
    using Microsoft.Xrm.Sdk.Messages; 

    public class FetchPagingWithCookieHelper
    {
        public void Retrieve(IOrganizationService service)
        {
            //单次查询的个数
            int fetchCount = 15;
            //第几页
            int pageNumber = 1;  
            string pagingCookie = null;
            int sumCount = 0;

            string fetchXml = @"<fetch version=‘1.0‘ output-format=‘xml-platform‘ mapping=‘logical‘ distinct=‘false‘>
                                  <entity name=‘new_supplyaccount‘>
                                    <attribute name=‘new_supplyaccountid‘ />
                                    <attribute name=‘new_name‘ />
                                    <filter type=‘and‘>
                                      <condition attribute=‘statecode‘ operator=‘eq‘ value=http://www.mamicode.com/‘0‘ />
                                    </filter>
                                  </entity>
                                </fetch>";
            while(true)
            {
                string xml = CreateXml(fetchXml, pagingCookie, pageNumber, fetchCount);

                RetrieveMultipleRequest retrieveRequest = new RetrieveMultipleRequest();
                retrieveRequest.Query = new FetchExpression(xml);

                EntityCollection returnCollection = ((RetrieveMultipleResponse)service.Execute(retrieveRequest)).EntityCollection;
                sumCount += returnCollection.Entities.Count;

                foreach (var c in returnCollection.Entities)
                {
                    DisplayEntity(c, "new_supplyaccount");
                }

                if (returnCollection.MoreRecords)
                { 
                    //如果还要更多记录，继续查询
                    pageNumber++;
                }
                else
                { 
                    //没有，则退出
                    break;
                }
            }
            System.Console.WriteLine("sumCount: " + sumCount);

        }

        public string CreateXml(string xml, string cookie, int page, int count)
        {
            StringReader stringReader = new StringReader(xml);
            XmlTextReader reader = new XmlTextReader(stringReader);

            XmlDocument doc = new XmlDocument();
            doc.Load(reader);

            return CreateXml(doc, cookie, page, count);
        }

        public string CreateXml(XmlDocument doc, string cookie, int page, int count)
        {
            XmlAttributeCollection attrs = doc.DocumentElement.Attributes;

            if (cookie != null)
            {
                XmlAttribute pagingAttr = doc.CreateAttribute("paging-cookie");
                pagingAttr.Value = http://www.mamicode.com/cookie;
                attrs.Append(pagingAttr);
            }

            XmlAttribute pageAttr = doc.CreateAttribute("page");
            pageAttr.Value = http://www.mamicode.com/System.Convert.ToString(page);
            attrs.Append(pageAttr);

            XmlAttribute countAttr = doc.CreateAttribute("count");
            countAttr.Value = http://www.mamicode.com/System.Convert.ToString(count);
            attrs.Append(countAttr);

            System.Text.StringBuilder sb = new System.Text.StringBuilder(1024);
            StringWriter stringWriter = new StringWriter(sb);

            XmlTextWriter writer = new XmlTextWriter(stringWriter);
            doc.WriteTo(writer);
            writer.Close();

            return sb.ToString();
        }

        private void DisplayEntity(Entity entity, string label)
        {
            System.Console.WriteLine("display" + label + "start_________________________________");
            var keyArray = entity.Attributes.Keys;
            foreach (string name in keyArray)
            {
                System.Console.WriteLine("attributeName: " + name + ",attributeValue: " + entity.Attributes[name]);
            }
            System.Console.WriteLine("display" + label + "end!_________________________________");
        }
    }