Exception Logging in K2

public class K2ExceptionHandler

    {

            System.Net.Mail.MailMessage expMail = null;

            System.Net.Mail.SmtpClient smtpClient = null;

            System.Net.Mail.MailAddress mailAddressFrom = null;

            Exception ex = null;

            object exContext = null;             

            string emailBody = string.Empty;

            bool bFlag = true;

            public void SendExceptionEmail(SourceCode.KO.ExceptionContext K2)

            {

            try

            {

                smtpClient = new System.Net.Mail.SmtpClient();

                expMail = new System.Net.Mail.MailMessage();

                //Mail To Address

                string mailTO = System.Configuration.ConfigurationManager.AppSettings["ExceptionEmailTo"]; // Get it from K2HostServer.exe.config file, located at "C:\Program Files (x86)\K2 blackpearl\Host Server\Bin"

                expMail.To.Add(mailTO);

                //Email From Address - Get it from String tabble

                string fromAddress = K2.StringTable["From Address"];

                mailAddressFrom = new System.Net.Mail.MailAddress(fromAddress);

                expMail.From = mailAddressFrom;

                //Email Subject

                expMail.Subject = "K2 Error: ProcessID " + K2.ProcessInstance.ID.ToString() + " for the Process, '" + K2.ProcessInstance.Process.FullName + "' is in error state";

                //Send HTML Email

                expMail.IsBodyHtml = true;

                expMail.Priority = System.Net.Mail.MailPriority.High;

                // Basic Message

                emailBody += "";

                emailBody += "";

                emailBody += "";

                emailBody += "";

                emailBody += "";

                emailBody += "

";

                emailBody += "";

                emailBody += "" ;

                emailBody += "
Dear Administrator,
";

                emailBody += "

";

                emailBody += "
"
+ " Error occurred in the K2 workflow, '" + K2.ProcessInstance.Process.FullName + "

' for the Process Intstance ID, '" + K2.ProcessInstance.ID.ToString() + "'. Below is a detailed extraction of the error and the process instance.";

                emailBody += "

";

                #region Process Instance Details

                emailBody += "
Process Intstance Details
";

                              

                emailBody += " " ;

                emailBody += "
"
;

                emailBody += "" ;

                emailBody += " " ;

                emailBody += "
ID:
";

                emailBody += "
"
+ K2.ProcessInstance.ID.ToString() + "

";

                emailBody += "

";

                emailBody += " " ;

                emailBody += "
Process Name:
";

                emailBody += "
"
+ K2.ProcessInstance.Process.FullName + "

";

                emailBody += "

";

               

                emailBody += " " ;

                emailBody += "
Folio:
";

                emailBody += "
"
+ K2.ProcessInstance.Folio + "

";

                emailBody += "

";

              

                emailBody += " " ;

                emailBody += "
Originator:
";

                emailBody += "
"
+ K2.ProcessInstance.Originator.DisplayName + "

";

                emailBody += "

";

                emailBody += " " ;

                emailBody += "
Start Date:
";

                emailBody += "
"
+ K2.ProcessInstance.StartDate.ToString() + "

";

                emailBody += "

";

                emailBody += "

";

                emailBody += "

";

                emailBody += "

";

                emailBody += "

";

                #endregion

                #region Process Data Fields

                emailBody += "
Data Field Values
";

                emailBody += " " ;

                emailBody += "
"
;

                emailBody += "" ;

                foreach (SourceCode.KO.DataField _dataField in K2.ProcessInstance.DataFields)

                {

                    emailBody += " " ;

                    emailBody += "
"
+ _dataField.Name + " [" + _dataField.FieldType.ToString() + "]

";

                    emailBody += "
"
+ _dataField.Value.ToString() + "

";

                    emailBody += "

";

                emailBody += "

";

                emailBody += "

";

                emailBody += "

";

                emailBody += "

";

                #endregion

                #region Failure Details

                emailBody += "
Failure Details
";

                emailBody += " " ;

                emailBody += "
"
;

                emailBody += "" ;

                //Check where the error happened

                switch (K2.ContextType)

                {

                    case SourceCode.KO.ContextType.ClientEvent:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Activity Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.ClientEventContext)exContext).ActivityInstanceDestination.Activity.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Event Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.ClientEventContext)exContext).Event.Name + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.DestinationRule:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Activity Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.DestinationRuleContext)exContext).ActivityInstance.Activity.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Destinations:
";

                            emailBody += "
"
;

                            foreach (SourceCode.KO.Destination _dest in ((SourceCode.KO.DestinationRuleContext)exContext).Destinations)

                            {

                                emailBody += " " + _dest.Name + " [" + _dest.Type.ToString() + "];";

                            }

                            emailBody += "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Slot Data:
";

                            emailBody += "
"
;

                            foreach (string _slotdata in ((SourceCode.KO.DestinationRuleContext)exContext).SlotInstanceData)

                            {

                                emailBody += " " + _slotdata + ";";

                            }

                            emailBody += "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Dynamic Queues:
";

                            emailBody += "
"
+ ((SourceCode.KO.DestinationRuleContext)exContext).DynamicQueues.ToString() + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Resolve queues to users:
";

                            emailBody += "
"
+ ((SourceCode.KO.DestinationRuleContext)exContext).ResolveQueuesToUsers.ToString() + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Single instance:
";

                            emailBody += "
"
+ ((SourceCode.KO.DestinationRuleContext)exContext).SingleInstance.ToString() + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Number of slots:
";

                            emailBody += "
"
+ ((SourceCode.KO.DestinationRuleContext)exContext).Slots.ToString() + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.EscalationAction:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Activity Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.EscalationActionContext)exContext).ActivityInstance.Activity.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Redirect:
";

                            emailBody += "
"
+ ((SourceCode.KO.EscalationActionContext)exContext).Redirect.ToString() + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.EscalationRule:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Activity Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.EscalationRuleContext)exContext).ActivityInstance.Activity.Name + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.EventEscalationAction:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Activity Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.EventEscalationActionContext)exContext).EventInstance.ActivityInstanceDestination.Activity.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Event Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.EventEscalationActionContext)exContext).EventInstance.Event.Name + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.EventEscalationRule:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Activity Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.EventEscalationRuleContext)exContext).EventInstance.ActivityInstanceDestination.Activity.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Event Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.EventEscalationRuleContext)exContext).EventInstance.Event.Name + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.EventSucceedingRule:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Activity Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.EventSucceedingRuleContext)exContext).EventInstance.ActivityInstanceDestination.Activity.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Event Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.EventSucceedingRuleContext)exContext).EventInstance.Event.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Succeeding rule:
";

                            emailBody += "
"
+ ((SourceCode.KO.EventSucceedingRuleContext)exContext).SucceedingRule.ToString() + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.IPCEvent:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Activity Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.IPCEventContext)exContext).ActivityInstanceDestination.Activity.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Event Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.IPCEventContext)exContext).Event.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
IPC process:
";

                            emailBody += "
"
+ ((SourceCode.KO.IPCEventContext)exContext).Process + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
IPC connection string:
";

                            emailBody += "
"
+ ((SourceCode.KO.IPCEventContext)exContext).ConnectionString + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Synchronous:
";

                            emailBody += "
"
+ ((SourceCode.KO.IPCEventContext)exContext).Synchronous + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.LineRule:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Start activity name:
";

                            emailBody += "
"
+ ((SourceCode.KO.LineRuleContext)exContext).LineInstance.StartActivityInstance.Activity.Name + "

";

                            emailBody += "

";

                            //The folllowing throws error as it does not have finish activity details

                            //_emailBody += " ";

                            //_emailBody += "
Finish activity:
";

                            //_emailBody += "
" + ((SourceCode.KO.LineRuleContext)_exContext).LineInstance.FinishActivityInstance.Activity.Name + "
";

                            //_emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Line name:
";

                            emailBody += "
"
+ ((SourceCode.KO.LineRuleContext)exContext).LineInstance.Line.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Line rule:
";

                            emailBody += "
"
+ ((SourceCode.KO.LineRuleContext)exContext).LineRule.ToString() + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.PrecedingRule:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Activity name:
";

                            emailBody += "
"
+ ((SourceCode.KO.PrecedingRuleContext)exContext).ActivityInstance.Activity.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Preceeding rule:
";

                            emailBody += "
"
+ ((SourceCode.KO.PrecedingRuleContext)exContext).PrecedingRule.ToString() + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.ProcessEscalationAction:

                    case SourceCode.KO.ContextType.ProcessEscalationRule:

                    case SourceCode.KO.ContextType.ProcessFinishRule:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.ProcessStartRule:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Message:
";

                            emailBody += "
"
+ ((SourceCode.KO.ProcessStartRuleContext)exContext).Message + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Start rule:
";

                            emailBody += "
"
+ ((SourceCode.KO.ProcessStartRuleContext)exContext).Start.ToString() + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.ServerEvent:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Activity Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.ServerEventContext)exContext).ActivityInstanceDestination.Activity.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Event Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.ServerEventContext)exContext).Event.Name + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.StartRule:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Activity Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.StartRuleContext)exContext).ActivityInstance.Activity.Name + "

";

                            emailBody += "

";

                            break;

                        }

                    case SourceCode.KO.ContextType.SucceedingRule:

                        {

                            emailBody += " " ;

                            emailBody += "
Error thrown by:
";

                            emailBody += "
"
+ K2.ContextType.ToString() + "

";

                            emailBody += "

";

                            exContext = K2.ContextObject;

                            emailBody += " " ;

                            emailBody += "
Activity Name:
";

                            emailBody += "
"
+ ((SourceCode.KO.SucceedingRuleContext)exContext).ActivityInstance.Activity.Name + "

";

                            emailBody += "

";

                            emailBody += " " ;

                            emailBody += "
Succeeding rule:
";

                            emailBody += "
"
+ ((SourceCode.KO.SucceedingRuleContext)exContext).SucceedingRule.ToString() + "

";

                            emailBody += "

";

                            break;

                        }

                    default:

                        {

                            emailBody += "
colspan=\"2\">No details available
";

                            break;

                        }

                }

                emailBody += "

";

                emailBody += "

";

                emailBody += "

";

                emailBody += "

";

                #endregion

                #region Exception Details

                emailBody += "
Exception Details
";

                emailBody += " " ;

                emailBody += "
"
;

                emailBody += "" ;

                ex = new Exception("NOTHING");

                ex = (Exception)K2.ExceptionObject;

                bFlag = true;

                while (bFlag == true)

                {

                    if (ex.InnerException != null)

                    {

                        ex = ex.InnerException;

                    }

                    else

                    {

                        emailBody += " " ;

                        emailBody += "
Message:
";

                        emailBody += "
"
+ ex.Message + "

";

                        emailBody += "

";

                        emailBody += " " ;

                        emailBody += "
Stack Trace:
";

                        emailBody += "
"
+ ex.StackTrace + "

";

                        emailBody += "

";

                        bFlag = false;

                    }

                }

               

                emailBody += "

";

                emailBody += "

";

                emailBody += "

";

              

                #endregion

                

                #region View Flow link

                string K2ServerName = string.Empty;

                //Workflow Management Server

                string strWorkflowServer = K2.StringTable["Workflow Server"]; //Integrated=True;IsPrimaryLogin=True;Authenticate=True;EncryptedPassword=False;Host=dlx;Port=5252

                string[] workflowServerDetails = strWorkflowServer.Split(';');

                foreach (string strWorkflowServerDetail in workflowServerDetails)

                {

                    if (strWorkflowServerDetail.Contains("Host"))

                    {

                        K2ServerName = strWorkflowServerDetail.Substring(strWorkflowServerDetail.IndexOf('=') + 1);

                    }

                }

                string strViewFlowURL = @"http://###K2Server###:81/ViewFlow/ViewFlow.aspx?ViewTypeName=ProcessView&K2Server=###K2Server###:5252&HostServerName=###K2Server###&HostServerPort=5555&ProcessID=###ProcinstID###";

                strViewFlowURL = strViewFlowURL.Replace("###K2Server###", K2ServerName);

                strViewFlowURL = strViewFlowURL.Replace("###ProcinstID###", K2.ProcessInstance.ID.ToString());

                string strViewFlowLink = "<" + "a href='" + strViewFlowURL + "' target=_blank>Click Here

";

                emailBody += "

";

                emailBody += "
To open the K2 View Flow, "
+ strViewFlowLink + ".

";

                emailBody += "

";

                #endregion

                emailBody += "
Regards,
";

                emailBody += "
K2 Exception Handler
";

                emailBody += "

";

                emailBody += "

";

                emailBody += "

";

                expMail.Body = emailBody;

                #region Send Email

                string smtpMailServer = K2.StringTable["Mail Server"]; //Get mail server from String table

                using (smtpClient as IDisposable)

                {

                    if (smtpMailServer.IndexOf(":") == -1)

                    {

                        smtpClient.Host = smtpMailServer;

                    }

                    else

                    {

                        string[] connection = smtpMailServer.Split(new Char[] { ':' });

                        Int32 I = 0;

                        if (string.IsNullOrEmpty(connection[0]) || string.IsNullOrEmpty(connection[1]))

                        {

                            throw new Exception("Invalid SMTP Server / Port arguments supplied.");

                        }

                        // PORT 2ND PARM ONLY!

                        if (Int32.TryParse(connection[1], out I))

                        {

                            smtpClient.Host = connection[0];

                            smtpClient.Port = Int32.Parse(connection[1]);

                        }

                        else

                        {

                            throw new Exception("Invalid SMTP Server / Port arguments supplied.");

                        }

                    }

                    using (expMail)

                    {

                        smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;

                        smtpClient.UseDefaultCredentials = true;

                        smtpClient.Send(expMail);                       

                    }

                }

                #endregion

            }

            catch (Exception expMail)

            {

                //Console.WriteLine("[Process Error Notify] Error sending email: " + exMail.Message); //todo Log error to Sharepoint Logs

            }

            finally

            {

                expMail = null;

                smtpClient = null;

                mailAddressFrom = null;

                throw ((Exception)K2.ExceptionObject);

            }

        }

    }