PreEntity and PostEntity Images in CRM 4.0

Hi ,

When writing callouts for CRM 3.0, we were provided with PreEntityImageXml and PostEntityImageXml as a parameter to methds being overrided by us.

We could specify the fields for the same in the callout.config as prevalue and postvalue tag.

But the things have changed a bit in CRM 4.0.

Here we have to implement the Execute method found in the interface IPlugin.

public void Execute(IPluginExecutionContext context)

Here first we will register our assembly using Plugin Registration Tool

Than we will register a new step and specify the message against which we want to run our plugin.

After this comes the step where we will Register  new image.

In Register New Image dialog box

We can specify Pre Image and Post Image depending upon pre or post event. (Only for post event we can have both pre and post image)

Parameters -Here we can either specify certain fields or can select all attributes.

Entity Alias – Give a name to our image which we will refer in our code. (eg. say we gave LeadImage)

Now to access these values within our plugin we need  to do the following:-

Cast it into a DynamicEntity
DynamicEntity preLead = (DynamicEntity)context.PreEntityImages[“LeadImage”];
DynamicEntity postLead = (DynamicEntity)context.PostEntityImages[“LeadImage”];

For getting the id of the entity ( unlike crm 3.0 we don;t have entity context over here )

Key keyLeadId = (Key)postLead.Properties[“leadid”];
string leadId = keyLeadId.Value.ToString();

For lookup field use this line of code

Lookup lkpLobPre = (Lookup)preLead.Properties[“new_linesofbusinessid”];
strPreLobGuid = lkpLobPre.Value.ToString();
Lookup lkpLobPost = (Lookup)postLead.Properties[“new_linesofbusinessid”];
strPostLobGuid = lkpLobPost .Value.ToString();

For owner field

Owner ownerLead = (Owner)postLead.Properties[“ownerid”];
strPostOwnerGuid = ownerLead.Value.ToString();

For money field

CrmMoney estimatedvalue = (CrmMoney)postLead[“new_expectedrevenue”];
strExpectedRevenue = estimatedvalue.Value.ToString();

For string field

String geoName = (String)postLead[“new_geographyidname”];

For picklist field

Picklist leadqualitycode = (Picklist)postLead[“leadqualitycode”];
strRating =;


CRM 4.0 – Exception: Unhandled Exception: System.Net.WebException: The request failed with HTTP status 401: Unauthorized.


I was facing this error when i was writing a plugin that was using CrmService.

After searching on internet i found out this

The problem was because Friendly name and Organization name were different.

The solution for it was

1. Launch Deployment Manager on the Web server
2. Select the Organization, Right Click -> Disable
3. RightClick Again and Click Edit Organization
4. Change the Organization Name and FriendlyName to be the same
5. Click Next and Finish.



Invalid action error-Microsoft Dynamics CRM 4.0

I was getting the Invalid Action error when trying to open Microsoft CRM 4.0.

And in the event log i could see the following entry.

Event Type:    Error
Event Source:    MSCRMKeyGenerator
Event Category:    None
Event ID:    18949
Date:        6/11/2008
Time:        4:59:35 PM
User:        N/A
Computer:    D-4526
Current active key (KeyType : CrmWRPCTokenKey) is expired.  This can indicate that a key is not being regenerated properly.  Current Active Key : CrmKey(Id:6e254808-b21d-dd11-9041-001d7d22e1af, ScaleGroupId:00000000-0000-0000-0000-000000000000, KeyType:CrmWRPCTokenKey, Expired:True, ValidOn:05/09/2008 10:23:58, ExpiresOn:06/11/2008 10:23:58, CreatedOn:05/09/2008 10:23:58, CreatedBy:NT AUTHORITY\NETWORK SERVICE.  Key Setting :

Starting the Microsoft CRM Asynchronous Processing Service on the server solved the problem for me!!!

Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly ‘Microsoft.Crm.Sdk….’

I created a simple plugin and when I was trying to register the plugin through the plugin registration tool I was getting the follwing error

Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly ‘Microsoft.Crm.Sdk, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ or one of its dependencies. The system cannot find the file specified.

at System.Reflection.Assembly._GetExportedTypes()

at System.Reflection.Assembly.GetExportedTypes()

at PluginRegistrationTool.AssemblyReader.RetrievePluginsFromAssembly(String path) in C:\Documents and Settings\arvinds1\Desktop\PluginRegistration\AssemblyReader.cs:line 59

at PluginRegistrationTool.AssemblyReader.RetrievePluginsFromAssembly(String path)

at PluginRegistrationTool.RegistrationHelper.RetrievePluginsFromAssembly(String pathToAssembly) in C:\Documents and Settings\arvinds1\Desktop\PluginRegistration\RegistrationHelper.cs:line 49

at PluginRegistrationTool.PluginRegistrationForm.btnLoadAssembly_Click(Object sender, EventArgs e) in C:\Documents and Settings\arvinds1\Desktop\PluginRegistration\PluginRegistrationForm.cs:line 127


The way I resolved the issue was by adding the microsoft.crm.sdk.dll to my machine’s GAC !!

I hope it works for others as well !!!

Many to many relationship in CRM 4.0 and Fetch XML

We have a custom entity called line of business (lob) for different line of business’s in our organization.

In CRM 3.0 there was no way we could have associated the lob custom entity with the system entity Team as there was no way of creating relationship between them.

But in CRM 4.0 we can now create a many to many relationship between the two.

Creating a many to many relationship between the two creates a new entity


Now say we want to write a custom code to retrieve all the teams associated with a given line of business, we can write something like below ( If we use query expression and retrieve multiple request it gives the error message saying that RetrieveMultiple is not supported on this entity)

This is the custom code for that

// setting the authentication token

CrmAuthenticationToken token = new CrmAuthenticationToken();

// 0- refers active directory

token.AuthenticationType = 0;

token.OrganizationName = “organizationname”;


CrmService crmService = new CrmService();

crmService.Url = http://servername/mscrmservices/2007/CrmService.asmx”;

crmService.Credentials = System.Net.CredentialCache.DefaultCredentials;

crmService.CrmAuthenticationTokenValue = token;


string fetch2= @”<fetch mapping=’logical’>

<entity name=’new_team_new_lineofbusiness’>

<attribute name=’teamid’ />


<condition attribute=’new_lineofbusinessid’ operator=’eq’ value=’C4BE129E-9B3C-DB11-8CBA-001185E68627′ />





// Fetch the results.



String result2 = crmService.Fetch(fetch2);


XmlDocument doc = new XmlDocument();


XmlNodeList xnodlist = doc.GetElementsByTagName(“teamid”);

string teamID = “”;

if (xnodlist.Count != 0)


for (int i = 0; i < xnodlist.Count; i++)


XmlNode xnodRoot = xnodlist.Item(i);

teamID = xnodRoot.InnerText;




catch (SoapException ex)