Web Forms :: NullReference Error / Running Windows Service
Mar 29, 2011
Hello all. I created a class that runs fine when using it with web forms, however when i create a Windows service and try to run it I recieve a NullReference error. Im not sure what else to do since the class works fine.Here is a snippet.
The service
public partial class Service1 : ServiceBase
{
//Timer object
Timer RunTime;
QBridge bridge_object = new QBridge()
double test_interval = 40000; //test value
public Service1()
{
InitializeComponent();
}
protected override void OnStart(string[] args)
{
//Send email notification that intakes were pushed
//bridge_object.SendNotification(bridge_object.service_startedtext);
RunTime = new Timer(30000);
//set the elapsed event
RunTime.Elapsed += new ElapsedEventHandler(RunTime_Elapsed);
//RunTime.Interval = SetInterval(); //calculated interval
RunTime.Interval = test_interval; // test interval
RunTime.Enbled = true; //set timer to true
//QBridge bridge_object = new QBridge();
//bridge_object.SendNotification("start");
//SendNotification("start");
}
protected override void OnStop()
{
RunTime.Enabled = false; RunTime.Dispose();
try
{
bridge_object.SendNotification("stop");
}
catch (NullReferenceException nre) { System.Windows.Forms.MessageBox.Show("Error " + nre); }
catch (Exception er) { System.Windows.Forms.MessageBox.Show("Error " + er); }
//SendNotification("end");
}
//Included this to test locally. works fine when just calling the method
protected void RunTime_Elapsed(object source, ElapsedEventArgs e)
{
//SendNotification("run");
try
{
bridge_object.SendNotification(run);
}
catch (NullReferenceException nre) { System.Windows.Forms.MessageBox.Show("Error " + nre); }
catch (Exception er) { System.Windows.Forms.MessageBox.Show("Error " + er); }
}
public void SendNotification(string email_text)
{
MailMessage initial = new MailMessage();
initial.Bcc.Add(new MailAddress(""));
initial.From = new MailAddress("");
initial.Subject = "Web notification";
initial.IsBodyHtml = true;
initial.Body = email_text;
SmtpClient mailClient = new SmtpClient("192.168.1.1");
try
{
mailClient.Send(initial);
}
catch (Exception ex) { }
}
}
Class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Net.Mail;
using System.IO;
using System.Configuration;
using System.Data.SqlClient;
using System.Data;
namespace Intake
{
public class QBridge
{
SqlConnection con =
new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
private string login_error;
public QBridge()
{
}
public void SendNotification(string email_text)
{
MailMessage initial = new MailMessage();
initial.Bcc.Add(new MailAddress(""));
initial.From = new MailAddress("");
initial.Subject = "Web notification";
initial.IsBodyHtml = true;
initial.Body = email_text;
SmtpClient mailClient = new SmtpClient("192.168.1.1");
try
{
mailClient.Send(initial);
}
catch (Exception ex) { }
}
}
}
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