Infopath Time Off Request For on Sharepoint Coding in C#

Question

So I have created a Time Off Request form to put up on our internal company intranet sharepoint site. 
I am trying to get this form to do several things.
First of all, after the user fills out the form they can click the submit button and it will email it to their manager.  That part is working fine.
The other button is the one that I am having trouble with.
Once the Manager receives the request I want them to be able to click a 2nd "approve" button and make the following happen:
A calendar entry is automatically created in the managers calendar for the day/days requested off.  It needs to be created as an All Day Event and Marked Private.
An appointment invitation needs to be sent to the requester so they can accept and the day/days will be added to their calendar as well.
An email needs to be sent to the Requester telling them their request has been approved.
Here is the code I have so far.  It is in C#
using Microsoft.Office.InfoPath;
using System;
using System.Windows.Forms;
using System.Xml;
using System.Xml.XPath;
using mshtml;
using Outlook = Microsoft.Office.Interop.Outlook;
using System.Reflection;
using System.Net;
using System.Net.Mail;
namespace ITTimeOffRequest
    public partial class FormCode
        public void InternalStartup()
            ((ButtonEvent)EventManager.ControlEvents["CTRL10_2"]).Clicked += new            ClickedEventHandler(CTRL10_2_Clicked);
        public void CTRL10_2_Clicked(object sender, ClickedEventArgs e)
            // Get a reference to the Main datasource
            XPathNavigator root = MainDataSource.CreateNavigator();
            // Create an Outlook application
            Outlook.Application outlookApp = new Outlook.Application();
            // Get NameSpace and Logon
            Outlook.NameSpace outlookNS = outlookApp.GetNamespace("mapi");
            outlookNS.Logon("arochelle", Missing.Value, false, true);
            // Create a new AppointmentItem
            Outlook.AppointmentItem appointmentItem =
          (Outlook.AppointmentItem)outlookApp.CreateItem(Microsoft.Office.Interop.Outlook.OlItemType.olAppointmentItem);
            appointmentItem.Sensitivity = Microsoft.Office.Interop.Outlook.OlSensitivity.olPrivate;
            appointmentItem.AllDayEvent = true;
            appointmentItem.ReminderSet = true;
            appointmentItem.ReminderMinutesBeforeStart = 5;
            appointmentItem.BusyStatus = Outlook.OlBusyStatus.olBusy;
            appointmentItem.IsOnlineMeeting = false;
            appointmentItem.OptionalAttendees = root.SelectSingleNode("//my:field2", NamespaceManager).Value;
            appointmentItem.Subject = ("Time Off Request");
            appointmentItem.Body = ("Date of request") + root.SelectSingleNode("//my:field4", NamespaceManager).Value;
            appointmentItem.Location = root.SelectSingleNode("//my:field13", NamespaceManager).Value;
            //appointmentItem.Start.Day.ToString = root.SelectSingleNode("//my:field10", NamespaceManager).Value;
            //appointmentItem.End.Day.ToString = root.SelectSingleNode("//my:field10", NamespaceManager).Value;
            //appointmentItem.Start = DateTimePicker.("//my:field10");
            //appointmentItem.End = DateTimePicker("//my:field10");
            appointmentItem.Start = DateTime.Parse("//my:field10");
            // Save to Calendar
            appointmentItem.Save();
            // Logoff
            outlookNS.Logoff();
            // Clean up
            appointmentItem = null;
            outlookNS = null;
            outlookApp = null;
            // Send Email Confirmation.
            SmtpClient client = new SmtpClient();
            client.Port = 25;
            client.Host = "sw-exchange";
            client.EnableSsl = false;
            client.Timeout = 10000;
            client.DeliveryMethod = SmtpDeliveryMethod.Network;
            client.UseDefaultCredentials = false;
            MailMessage mm = new MailMessage("<manager email address here", "//my:field2", "Your Time Off Has Been
                Approved", "Your Time Off Has Been Approved");
            mm.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
            client.Send(mm);
Obviously i'm trying to get the code to pull in a lot of the information from the fields people have filled on on the form.  For example in the send email confirmation section Field 2 is the choose emplayee email drop down box on the form.  CTRL10_2
is the approve button.  Field 10 is the day requested off.  The form has five lines to request days off on it and each line has a date picker to choose the day.  A text field for number of hours requested off, a Time field for Start Time, a
Time field for End Time and a Drop down box to pick Sick Leave or Annual Leave.
I'm having a problem with creating the appointment on the appropriate day in the managers calendar and then sending the appointment request to the requester.  That is where the code errors out.  This is only the coding for the first line of time
off requests as well, i'm not sure how to change the code so that it will include all 5 request lines unless I have to use some kind of Matrix or something.
I'm trying to get the appointmentitem.start and .end to pull from the date(s) that have been requested off but what happens so far is that when the approve button is clicked it just crates a private all day calendar entry for the current day on the managers
calendar and doesn't generate the appointment request for the requester or send the confirmation email.
Any help would be greatly greatly appreciated.

Answer 1

for the electronic form:
since you're on Standard edition, I wouldn't recommend InfoPath... I'd start with standard SharePoint list (using attachments for scanned images)... if it needs to be customized, I'd use web dev approaches (HTML+JavaScript), since we've found this approach
to be VERY upgradable.
For the process:
Assuming the process is LINEAR, I'd use SharePoint Designer with an approval process activity and a task activity (for AP). If the process is NOT linear, I'd look into a third party component like Nintex or K2 (you may find some people who say "just build
it with Visual Studio"... don't. You'll regret it later, and the business will too).
Scott Brickey
MCTS, MCPD, MCITP
www.sbrickey.com
Strategic Data Systems - for all your SharePoint needs