- •About the Authors
- •Contents at a Glance
- •Contents
- •Introduction
- •Goal of the Book
- •How to Use this Book
- •Introduction to the .NET Framework
- •Common Language Runtime (CLR)
- •Class Library
- •Assembly
- •Versioning
- •Exceptions
- •Threads
- •Delegates
- •Summary
- •Introduction to C#
- •Variables
- •Initializing Variables
- •Variable Modifiers
- •Variable Data Types
- •Types of Variables
- •Variable Scope
- •Types of Data Type Casting
- •Arrays
- •Strings
- •Initializing Strings
- •Working with Strings
- •Statements and Expressions
- •Types of Statements
- •Expressions
- •Summary
- •Classes
- •Declaring Classes
- •Inheritance
- •Constructors
- •Destructors
- •Methods
- •Declaring a Method
- •Calling a Method
- •Passing Parameters to Methods
- •Method Modifiers
- •Overloading a Method
- •Namespaces
- •Declaring Namespaces
- •Aliases
- •Structs
- •Enumerations
- •Interfaces
- •Writing, Compiling, and Executing
- •Writing a C# Program
- •Compiling a C# Program
- •Executing a C# Program
- •Summary
- •Arrays
- •Single-Dimensional Arrays
- •Multidimensional Arrays
- •Methods in Arrays
- •Collections
- •Creating Collections
- •Working with Collections
- •Indexers
- •Boxing and Unboxing
- •Preprocessor Directives
- •Summary
- •Attributes
- •Declaring Attributes
- •Attribute Class
- •Attribute Parameters
- •Default Attributes
- •Properties
- •Declaring Properties
- •Accessors
- •Types of Properties
- •Summary
- •Introduction to Threads
- •Creating Threads
- •Aborting Threads
- •Joining Threads
- •Suspending Threads
- •Making Threads Sleep
- •Thread States
- •Thread Priorities
- •Synchronization
- •Summary
- •Case Study
- •Project Life Cycle
- •Analyzing Requirements
- •High-Level Design
- •Primary and Foreign Keys
- •Referential Integrity
- •Normalization
- •Designing a Database
- •Low-Level Design
- •Construction
- •Integration and Testing
- •User Acceptance Testing
- •Implementation
- •Operations and Maintenance
- •Summary
- •Creating a New Project
- •Console Application
- •Windows Applications
- •Creating a Windows Application for the Customer Maintenance Project
- •Creating an Interface for Form1
- •Creating an Interface for WorkerForm
- •Creating an Interface for CustomerForm
- •Creating an Interface for ReportsForm
- •Creating an Interface for JobDetailsForm
- •Summary
- •Performing Validations
- •Identifying the Validation Mechanism
- •Using the ErrorProvider Control
- •Handling Exceptions
- •Using the try and catch Statements
- •Using the Debug and Trace Classes
- •Using the Debugging Features of Visual Studio .NET
- •Using the Task List
- •Summary
- •Creating Form1
- •Connecting WorkerForm to the Workers Table
- •Connecting CustomerForm to the tblCustomer Table
- •Connecting the JobDetails Form
- •to the tblJobDetails Table
- •Summary
- •Introduction to the Crystal Reports Designer Tool
- •Creating the Reports Form
- •Creating Crystal Reports
- •Creating the Windows Forms Viewer Control
- •Creating the Monthly Worker Report
- •Summary
- •Introduction to Deploying a Windows Application
- •Deployment Projects Available in Visual Studio .NET
- •Deployment Project Editors
- •Summary
- •Case Study
- •Project Life Cycle
- •Analyzing Requirements
- •High-Level Design
- •Low-Level Design
- •Summary
- •Populating the TreeView Control
- •Displaying Employee Codes in the TreeView Control
- •Event Handling
- •Displaying Employee Details in the ListView Control
- •Summary
- •Case Study
- •Project Life Cycle
- •Analyzing Requirements
- •High-Level Design
- •Low-Level Design
- •Summary
- •Adding the Programming Logic to the Application
- •Adding Code to the Form Load() Method
- •Adding Code to the OK Button
- •Adding Code to the Exit Button
- •Summary
- •The Created Event
- •Adding Code to the Created Event
- •Overview of XML
- •The XmlReader Class
- •The XmlWriter Class
- •Displaying Data in an XML Document
- •Displaying an Error Message in the Event Log
- •Displaying Event Entries from Event Viewer
- •Displaying Data from the Summary.xml Document in a Message Box
- •Summary
- •Airline Profile
- •Role of a Business Manager
- •Role of a Network Administrator
- •Role of a Line-of-Business Executive
- •Project Requirements
- •Creation and Deletion of User Accounts
- •Addition of Flight Details
- •Reservations
- •Cancellations
- •Query of Status
- •Confirmation of Tickets
- •Creation of Reports
- •Launch of Frequent Flier Programs
- •Summarizing the Tasks
- •Project Design
- •Database Design
- •Web Forms Design
- •Enabling Security with the Directory Structure
- •Summary
- •Getting Started with ASP.NET
- •Prerequisites for ASP.NET Applications
- •New Features in ASP.NET
- •Types of ASP.NET Applications
- •Exploring ASP.NET Web Applications
- •Introducing Web Forms
- •Web Form Server Controls
- •Configuring ASP.NET Applications
- •Configuring Security for ASP.NET Applications
- •Deploying ASP.NET Applications
- •Creating a Sample ASP.NET Application
- •Creating a New Project
- •Adding Controls to the Project
- •Coding the Application
- •Summary
- •Creating the Database Schema
- •Creating Database Tables
- •Managing Primary Keys and Relationships
- •Viewing the Database Schema
- •Designing Application Forms
- •Standardizing the Interface of the Application
- •Common Forms in the Application
- •Forms for Network Administrators
- •Forms for Business Managers
- •Forms for Line-of-Business Executives
- •Summary
- •The Default.aspx Form
- •The Logoff.aspx Form
- •The ManageUsers.aspx Form
- •The ManageDatabases.aspx Form
- •The ChangePassword.aspx Form
- •Restricting Access to Web Forms
- •The AddFl.aspx Form
- •The RequestID.aspx Form
- •The Reports.aspx Form
- •The FreqFl.aspx Form
- •Coding the Forms for LOB Executives
- •The CreateRes.aspx Form
- •The CancelRes.aspx Form
- •The QueryStat.aspx Form
- •The ConfirmRes.aspx Form
- •Summary
- •Designing the Form
- •The View New Flights Option
- •The View Ticket Status Option
- •The View Flight Status Option
- •The Confirm Reservation Option
- •Testing the Application
- •Summary
- •Locating Errors in Programs
- •Watch Window
- •Locals Window
- •Call Stack Window
- •Autos Window
- •Command Window
- •Testing the Application
- •Summary
- •Managing the Databases
- •Backing Up the SkyShark Airlines Databases
- •Exporting Data from Databases
- •Examining Database Logs
- •Scheduling Database Maintenance Tasks
- •Managing Internet Information Server
- •Configuring IIS Error Pages
- •Managing Web Server Log Files
- •Summary
- •Authentication Mechanisms
- •Securing a Web Site with IIS and ASP.NET
- •Configuring IIS Authentication
- •Configuring Authentication in ASP.NET
- •Securing SQL Server
- •Summary
- •Deployment Scenarios
- •Deployment Editors
- •Creating a Deployment Project
- •Adding the Output of SkySharkDeploy to the Deployment Project
- •Deploying the Project to a Web Server on Another Computer
- •Summary
- •Organization Profile
- •Project Requirements
- •Querying for Information about All Books
- •Querying for Information about Books Based on Criteria
- •Ordering a Book on the Web Site
- •Project Design
- •Database Design
- •Database Schema
- •Web Forms Design
- •Flowcharts for the Web Forms Modules
- •Summary
- •Introduction to ASP.NET Web Services
- •Web Service Architecture
- •Working of a Web Service
- •Technologies Used in Web Services
- •XML in a Web Service
- •WSDL in a Web Service
- •SOAP in a Web Service
- •UDDI in a Web Service
- •Web Services in the .NET Framework
- •The Default Code Generated for a Web Service
- •Testing the SampleWebService Web Service
- •Summary
- •Creating the SearchAll() Web Method
- •Creating the SrchISBN() Web Method
- •Creating the AcceptDetails() Web Method
- •Creating the GenerateOrder() Web Method
- •Testing the Web Service
- •Securing a Web Service
- •Summary
- •Creating the Web Forms for the Bookers Paradise Web Site
- •Adding Code to the Web Forms
- •Summary
- •Case Study
- •Project Life Cycle
- •Analyzing Requirements
- •High-Level Design
- •Low-Level Design
- •Summary
- •Overview of Mobile Applications
- •The Microsoft Mobile Internet Toolkit
- •Overview of WAP
- •The WAP Architecture
- •Overview of WML
- •The Mobile Web Form
- •The Design of the MobileTimeRetriever Application
- •Creating the Interface for the Mobile Web Forms
- •Adding Code to the MobileTimeRetriever Application
- •Summary
- •Creating the Forms Required for the MobileCallStatus Application
- •Creating the frmLogon Form
- •Creating the frmSelectOption Form
- •Creating the frmPending Form
- •Creating the frmUnattended Form
- •Adding Code to the Submit Button in the frmLogon Form
- •Adding Code to the Query Button in the frmSelectOption Form
- •Adding Code to the Mark checked as complete Button in the frmPending Form
- •Adding Code to the Back Button in the frmPending Form
- •Adding Code to the Accept checked call(s) Button in the frmUnattended Form
- •Adding Code to the Back Button in the frmUnattended Form
- •Summary
- •What Is COM?
- •Windows DNA
- •Microsoft Transaction Server (MTS)
- •.NET Interoperability
- •COM Interoperability
- •Messaging
- •Benefits of Message Queues
- •Limitations
- •Key Messaging Terms
- •Summary
- •Pointers
- •Declaring Pointers
- •Types of Code
- •Implementing Pointers
- •Using Pointers with Managed Code
- •Working with Pointers
- •Compiling Unsafe Code
- •Summary
- •Introduction to the Languages of Visual Studio .NET
- •Visual C# .NET
- •Visual Basic .NET
- •Visual C++ .NET
- •Overview of Visual Basic .NET
- •Abstraction
- •Encapsulation
- •Inheritance
- •Polymorphism
- •Components of Visual Basic .NET
- •Variables
- •Constants
- •Operators
- •Arrays
- •Collections
- •Procedures
- •Arguments
- •Functions
- •Adding Code to the Submit Button
- •Adding Code to the Exit Button
- •Summary
- •Introduction to Visual Studio .NET IDE
- •Menu Bar
- •Toolbars
- •Visual Studio .NET IDE Windows
- •Toolbox
- •The Task List Window
- •Managing Windows
- •Customizing Visual Studio .NET IDE
- •The Options Dialog Box
- •The Customize Dialog Box
- •Summary
- •Index
514 Project 4 CREATING AN AIRLINE RESERVATION PORTAL
lstClass.SelectedIndex=0; Cal1.SelectedDate=DateTime.Today; txtTNo.Text=””;
txtFare.Text=””; txtStatus.Text=””; txtOrg.Text=””; txtDest.Text=””; txtDepTime.Text=””; txtName.Text=””; txtEMail.Text=””; txtFltNo.Enabled=true; lstClass.Enabled=true; Cal1.Enabled=true;
Response.Redirect(“Ticket.aspx?TNo=” + TicketNo);
}
catch (Exception ex)
{
lblMessage.Text=ex.Message; sqlConnection1.Close(); txtFltNo.Enabled=true; lstClass.Enabled=true; Cal1.Enabled=true;
}
}
The CancelRes.aspx Form
The CancelRes.aspx form is used to perform cancellation of reservations. When a ticket is cancelled, the status of the flight needs to be updated in the dtFltStatus table. You also need to update the status of the passengers on the flight who are in the waiting list. In addition, you also need to compute the refund amount that is applicable to the passenger.
To perform cancellations, I have used a combination of stored procedures and programming logic. The steps to cancel a reservation are given as follows:
1.Retrieve the fare that the passenger had paid.
2.Compute the refund applicable to the customer, depending upon whether or not the flight has departed.
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3.Update status of other passengers who might have been confirmed because of the cancellation of ticket.
4.Create a record in the dtCancellations table and delete the reservation of the passenger from the dtReservations table.
The first two tasks are performed by programming logic, the code for which is given as follows:
lblMessage.Text=””; dataSet51.Clear(); sqlConnection1.Open();
sqlDataAdapter1.SelectCommand.Parameters[0].Value=txtTNo.Text.Trim(); sqlDataAdapter1.Fill(dataSet51, “TicketDetails”); sqlConnection1.Close();
if (dataSet51.Tables[“TicketDetails”].Rows.Count==0)
{
lblMessage.Text=”Invalid ticket number”; return;
}
else
{
string ticketno, user, cancdate, journeydate; int refund, fare; ticketno=txtTNo.Text.Trim();
journeydate=dataSet51.Tables[“TicketDetails”].Rows[0][2].ToString(); fare=Convert.ToInt32(dataSet51.Tables[“TicketDetails”]. Rows[0][6].ToString()); if (Convert.ToDateTime(journeydate)<=DateTime.Today)
{
refund=fare-10;
}
else
{
refund=Convert.ToInt32(fare*0.8);
}
After the refund amount has been calculated, the details of the ticket that needs to be cancelled are passed to a stored procedure that updates the status of other customers booked on the flight and also deletes the customer record from the
516 Project 4 CREATING AN AIRLINE RESERVATION PORTAL
dtReservations database. The code for the DeleteReservations stored procedure, which accomplishes these tasks, is given as follows:
CREATE PROCEDURE DeleteReservations
@ticketno char(10), @user char(15), @cancdate datetime, @refund int AS
Declare @fltno char(10)
Declare @date datetime
Declare @class char(10)
Declare @status int
select @fltno=FltNo, @date=DateOfJourney, @class=ClassOfRes , @status=Status from dtReservations where TicketNo=@ticketno
Update dtReservations
set Status=Status+1 where FltNo=@fltno and DateOfJourney=@date and ClassOfRes=@class and Status<@status
Update dtFltStatus
set Status=Status+1 where FltNo=@fltno and StatusDate=@date and StatusClass=@class
INSERT into dtCancellations
values (@ticketno, @refund, @user, @cancdate) Delete dtReservations where TicketNo=@ticketno GO
The QueryStat.aspx Form
The QueryStat.aspx page is used for querying the status of flights and tickets. LOB executives can either use the flight number to query the status of a flight or use the ticket number to query the status of a ticket. In both the cases, an error message is displayed if the number specified is invalid. Otherwise, the status of the flight or ticket is retrieved and displayed to the user.
The following code is used for querying the status of a flight:
private void Button2_Click(object sender, System.EventArgs e)
{
dataSet41.Clear(); lblMessage.Text=””; lblStatus.Text=””;
if (txtFltNo.Text==”” || txtFltNo.Text==null)
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{
lblMessage.Text=”Invalid flight number”; return;
}
else
{
sqlConnection1.Open(); sqlDataAdapter1.SelectCommand.Parameters[0].Value=txtFltNo.Text.Trim(); sqlDataAdapter1.SelectCommand.Parameters[1].Value=Cal1. SelectedDate
.ToShortDateString(); sqlDataAdapter1.SelectCommand.Parameters[2].Value= lstClass.SelectedItem
.Text;
sqlDataAdapter1.Fill(dataSet41, “FltStatus”); sqlConnection1.Close();
if (dataSet41.Tables[“FltStatus”].Rows.Count==0)
{
lblStatus.Text=”Status: Available”;
}
else
{
string strStatus; int status;
strStatus=dataSet41.Tables[“FltStatus”].Rows[0][0].ToString(); status=Convert.ToInt32(strStatus);
if (status >= 0)
{
lblStatus.Text=”Status: Available”;
}
else
{
lblStatus.Text=”Status: Overbooked (“ + strStatus + “)”;
}
}
}
}