.NET FOLLOWER

    One of the most frequently used operation with OrganizationServiceProxy is to get information about the current user. For simplicity such operation could be implemented as an extension to the OrganizationServiceProxy class. So, let’s put the following code somewhere in a project:

using Microsoft.Crm.Sdk.Messages;
using Microsoft.Xrm.Sdk.Client;

namespace dotNetFollower
{
    public static class OrganizationServiceProxyExtensions
    {
        public static WhoAmIResponse GetCurrentUser(this OrganizationServiceProxy proxy)
        {
            return (WhoAmIResponse)proxy.Execute(new WhoAmIRequest());
        }
    }
}

How to use the extension is shown below:

var serverConnection = new ServerConnectionEx();
serverConnection.DoInOrganizationServiceProxyContext(crmConfiguration, proxy =>
{
	Guid userId = proxy.GetCurrentUser().UserId;

	// do something else
});

The code above supposes that you use the ServerConnection helper class in your project. The ServerConnectionEx class, in turn, is derived from ServerConnection and described in the article Dynamics CRM: How to connect to CRM through the code.

More elegant way, as for me, is to add a lazy-loading property to a class derived from OrganizationServiceProxy. But in this case we have to make a lot of small changes within the ServerConnection class as the class creates and operates the instance of OrganizationServiceProxy. So, the derived class in this case looks like the following:

using System;
using System.ServiceModel.Description;
using Microsoft.Crm.Sdk.Messages;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Client;

namespace dotNetFollower
{
  public class OrganizationServiceProxyEx : OrganizationServiceProxy
  {
    private WhoAmIResponse _whoAmIResponse;

    public WhoAmIResponse CurrentUser
    {
      get { return _whoAmIResponse ?? 
              (_whoAmIResponse = (WhoAmIResponse) Execute(new WhoAmIRequest())); }
    }

    public OrganizationServiceProxyEx(IServiceConfiguration<IOrganizationService> serviceConfiguration, 
                             ClientCredentials clientCredentials)
        : base(serviceConfiguration, clientCredentials)
    {            
    }
    public OrganizationServiceProxyEx(IServiceConfiguration<IOrganizationService> serviceConfiguration,
                                    SecurityTokenResponse securityTokenResponse)
        : base(serviceConfiguration, securityTokenResponse)
    {            
    }
    public OrganizationServiceProxyEx(IServiceManagement<IOrganizationService> serviceManagement,
                                    ClientCredentials clientCredentials)
        : base(serviceManagement, clientCredentials)
    {            
    }
    public OrganizationServiceProxyEx(IServiceManagement<IOrganizationService> serviceManagement,
                                    SecurityTokenResponse securityTokenResponse)
        : base(serviceManagement, securityTokenResponse)
    {            
    }
    public OrganizationServiceProxyEx(Uri uri, Uri homeRealmUri, ClientCredentials clientCredentials,
                                    ClientCredentials deviceCredentials)
        : base(uri, homeRealmUri, clientCredentials, deviceCredentials)
    {            
    }
  }
}

The next step is to open CrmServiceHelpers.cs and replace all mentions of OrganizationServiceProxy with OrganizationServiceProxyEx. Then do the same for ServerConnectionEx in case you use it. Or you can just take the demonstration project, where all required changes are applied. Download it here – ConnectToCrm2.zip.

Below is how to use the CurrentUser property exposed by the custom proxy class:

var serverConnection = new ServerConnectionEx();
serverConnection.DoInOrganizationServiceProxyContext(SampleCrmConfiguration, proxy =>
{
	Guid userId = proxy.CurrentUser.UserId;
	
	// do something else
});