Code Snippet
using System;
using System.Diagnostics;
using System.IO;
using System.Xml;
using WorkingWithCrm.Callout.CrmSdk;
using WorkingWithCrm.Callout.MetadataServiceSdk;
using Microsoft.Crm.Callout;
namespace WorkingWithCrm.Callout
{
///
/// This Sample shows how to log various events with callouts
///
public class LeadCallout: CrmCalloutBase
{
public LeadCallout()
{
}
// This Sample shows how to log an object creation using a precallout
public override PreCalloutReturnValue PreCreate(CalloutUserContext userContext, CalloutEntityContext entityContext, ref string entityXml, ref string errorMessage)
{
// Call the helper function NextLeadNumber() to return the next highest lead number value
string nextLeadNumber = NextLeadNumber();
// Create an xml document in order to work with the xml stream
XmlDocument entityDoc = new XmlDocument();
entityDoc.LoadXml(entityXml);
// Create the appropriate xml node
XmlNodeList propertyList = entityDoc.GetElementsByTagName("Property");
XmlElement leadNumberValue = null;
XmlElement properties = (XmlElement) entityDoc.GetElementsByTagName("Properties")[0];
XmlElement leadNumberElement = entityDoc.CreateElement("Property");
XmlAttribute typeAttrib = entityDoc.CreateAttribute("type");
// Set the values for our new_leadnumber field
leadNumberElement.SetAttribute("type", "http://www.w3.org/2001/XMLSchema-instance", "StringProperty");
leadNumberElement.SetAttribute("Name", "new_leadnumber");
leadNumberValue = entityDoc.CreateElement("Value");
leadNumberValue.InnerText = NextLeadNumber();
leadNumberElement.AppendChild(leadNumberValue);
properties.AppendChild(leadNumberElement);
// Add back to the entityXml
StringWriter output = new StringWriter();
entityDoc.Save(output);
entityXml = output.ToString();
// Remove the extra XML that will confuse CRM
entityXml = entityXml.Replace("xmlns=\"\"", "");
entityXml = entityXml.Replace("", "");
return PreCalloutReturnValue.Continue;
}
#region Helpers
public bool IsTextIncluded( string InputString, string ValueToCheck )
{
return (InputString.IndexOf(ValueToCheck) > -1);
}
public string NextLeadNumber()
{
// Standard CRM Service Setup
CrmService service = new CrmService();
service.Credentials = System.Net.CredentialCache.DefaultCredentials;
// We need a user that has global read access to the lead record so that we
// have the absolute maximum lead number. If all roles have global read privileges to
// the read value of the Lead, then this wouldn't be necessary.
// For production, access this guid in a config file.
Guid callerid = new Guid("0686EE2A-FC46-DA11-B935-0003FF07CD51");
// Impersonate our global read user
service.CallerIdValue = new CallerId();
service.CallerIdValue.CallerGuid = callerid;
// Create a set of columns to return
ColumnSet cols = new ColumnSet();
cols.Attributes = new string [] {"leadid", "new_leadnumber"};
// Set the order of the bring back the highest new_leadnumber value at the top
OrderExpression order = new OrderExpression();
order.AttributeName = "new_leadnumber";
order.OrderType = OrderType.Descending;
// To improve performance, we will only pass back the top record
// This will return only 1 page with 1 record per page
PagingInfo pages = new PagingInfo();
pages.PageNumber = 1;
pages.Count = 1;
// Create a query expression and set the query parameters
QueryExpression query = new QueryExpression();
query.EntityName = EntityName.lead.ToString();
query.ColumnSet = cols;
query.Orders = new OrderExpression[] {order};
query.PageInfo = pages;
// Retrieve the values from CRM
BusinessEntityCollection retrieved = service.RetrieveMultiple(query);
string nextNumber = "1";
// Check to see if we have any records
if (retrieved.BusinessEntities.Length > 0)
{
// Cast to results lead object and only retrieve first record
lead results = (lead)retrieved.BusinessEntities[0];
// Return the next value lead number. If there are records, but none have a number (the result will be null), so just pass back 1
nextNumber = (results.new_leadnumber != null) ? (results.new_leadnumber.Value + 1).ToString() : "1";
}
return nextNumber;
}
#endregion
}
}
