Custom Workflow Activity: Date Checker

Server\FullSample\CustomWorkflowActivity\CS\DateChecker.cs
Server\FullSample\CustomWorkflowActivity\VB\DateChecker.cs

using System;
using System.IO;
using System.Net;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Collections;
using System.Workflow.ComponentModel.Compiler;
using System.Workflow.ComponentModel.Serialization;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Design;
using System.Workflow.Runtime;
using System.Workflow.Activities;
using System.Workflow.Activities.Rules;
using Microsoft.Crm.Sdk;
using Microsoft.Crm.SdkTypeProxy;
using Microsoft.Crm.Workflow;
using Microsoft.Crm.Workflow.Activities;

namespace CustomWorkflowActivity
{
   [CrmWorkflowActivity("Date Checker", "Custom")]
   public class DateChecker : SequenceActivity
   {
      protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
      {
         // If the opportunity's "Est. Close Date" is greater than 10 days, send an e-mail to the  
         // administrator so that he or she can verify the close date with the owner of the opportunity.
         DateTime todayPlusTen = DateTime.Now.AddDays(10.0);

            if (DateTime.Compare(this.estCloseDate.UserTime, todayPlusTen) > 0)
         {
            IContextService contextService = (IContextService)executionContext.GetService(typeof(IContextService));
            IWorkflowContext context = contextService.Context;

            ICrmService crmService = context.CreateCrmService();

            // Need system user id for activity party.
            WhoAmIRequest systemUserRequest = new WhoAmIRequest();
            WhoAmIResponse systemUser = (WhoAmIResponse)crmService.Execute(systemUserRequest);

            // Create an activity party for the e-mail.
                DynamicEntity[] parties = new DynamicEntity[1];
                parties[0] = new DynamicEntity();
                parties[0].Name = EntityName.activityparty.ToString();
                PropertyCollection party = new PropertyCollection();
                party.Add(new LookupProperty("partyid", new Lookup(EntityName.systemuser.ToString(), systemUser.UserId)));
                parties[0].Properties = party;
                
            // Create an e-mail message.
                DynamicEntity emailDE = new DynamicEntity();
                emailDE.Name = EntityName.email.ToString();
            
            // Set e-mail properties.
                PropertyCollection emailProperties = new PropertyCollection();
                emailProperties.Add(new DynamicEntityArrayProperty("to", parties));
                emailProperties.Add(new DynamicEntityArrayProperty("from", parties));
                emailProperties.Add(new StringProperty("subject", "Warning: Close date has been extended more than 10 days."));
                emailProperties.Add(new StringProperty("description", "Verify close date is correct."));
                emailProperties.Add(new CrmBooleanProperty("directioncode", new CrmBoolean(true)));
                emailDE.Properties = emailProperties;
                
            Guid emailID = crmService.Create(emailDE);

            // Create a SendEmail request.
            SendEmailRequest emailRequest = new SendEmailRequest();
            emailRequest.EmailId = emailID;
            emailRequest.TrackingToken = "";
            emailRequest.IssueSend = true;

            // Send the e-mail message.
            SendEmailResponse emailResponse = (SendEmailResponse)crmService.Execute(emailRequest);
         }
         else
         {
            // Est. Close Date is <= 10 days from today.  No action required.
         }

         return ActivityExecutionStatus.Closed;
      }

      public static DependencyProperty estCloseDateProperty = DependencyProperty.Register("estCloseDate", typeof(CrmDateTime), typeof(DateChecker));

      [CrmInput("The estimated close date")]
      public CrmDateTime estCloseDate
      {
         get
         {
            return (CrmDateTime)base.GetValue(estCloseDateProperty);
         }
         set
         {
            base.SetValue(estCloseDateProperty, value);
         }
      }
   }
}