504 Project 4 CREATING AN AIRLINE RESERVATION PORTAL

The Reports.aspx Form

The Reports.aspx form is used for generating reports. The SkyShark Airlines application supports three reports.I have added three SqlDataAdapter controls on the form; one for each report. To add three SqlDataAdapter controls to the form,

drag the dtPassengerDetails and dtDepartedFlights tables to the form. I have

added the dtPassengerDetails table to the Component Designer twice so that I can configure two sqlDataAdapter controls for the application. The SelectCommand queries associated with each sqlDataAdapter control are given as follows:

sqlDataAdapter1. SELECT FltNo, SUM(Fare) AS Fare FROM dtDepartedFlights WHERE (DateOfJourney > @date) GROUP BY FltNo

sqlDataAdapter2. SELECT FltNo, DateOfJourney, SUM(Fare) AS Revenue FROM dtDepartedFlights GROUP BY DateOfJourney, FltNo

sqlDataAdapter3. SELECT TOP 100 EMail, FareCollected, TotalTimesFlown FROM dtPassengerDetails ORDER BY TotalTimesFlown

In the preceding list, the sqlDataAdapter1 control is used for generating the total revenue report. The total revenue report displays the total revenue generated by each flight after a specified date. The sqlDataAdapter2 control is used for generating the flight usage report for all flights flown by the airline. The flight usage report displays the total daily revenue generated by each flight. Finally, the sqlDataAdapter3 control is used for identifying the top 100 customers who have flown the airline most frequently.

For generating the total revenue report, you need to specify a date from which the report should be generated. After you select the date and click on Generate, the following sequence of steps generates the report:

1.The date is constructed by retrieving the month and year selected by the user and appending 01 to the date. Therefore, if the user has selected the month 07 and the year 2003, the date generated will be 07/01/2003, in the mm/dd/yyyy format.

2.The generated date is passed to the SelectCommand query of sqlDataAdapter1 as a parameter and the result is retrieved in a dataset.

3.The table in the dataset is associated with an object of the DataView class, which is bound to the DataGrid1 control to display the output report to the user.

The code to generate the total revenue report is given as follows:

private void Button4_Click(object sender, System.EventArgs e)

{

dataSet21.Clear(); DataGrid1.DataSource=””; string month, date, year;

month=lstMonth.SelectedItem.Text; year=lstYear.SelectedItem.Text; date=month + “/01/” + year; sqlConnection1.Open();

sqlDataAdapter1.SelectCommand.Parameters[0].Value=date; sqlDataAdapter1.Fill(dataSet21,”Revenue”); sqlConnection1.Close();

DataView source=new DataView(dataSet21.Tables[“Revenue”]);

DataGrid1.DataSource=source;

DataGrid1.DataBind();

}

The flight usage report does not accept any information from the user because it generates a report for all the flights.The code for this report is straightforward, as given here:

private void Button1_Click(object sender, System.EventArgs e)

{

dataSet21.Clear(); DataGrid1.DataSource=””; sqlConnection1.Open(); sqlDataAdapter2.Fill(dataSet21,”Usage”);

DataView source=new DataView(dataSet21.Tables[“Usage”]);

DataGrid1.DataSource=source;

DataGrid1.DataBind(); sqlConnection1.Close();

}

506 Project 4 CREATING AN AIRLINE RESERVATION PORTAL

Finally, the code of the customer affinity report, which queries the top 100 customers who have flown the airline, is given as follows:

private void Button3_Click(object sender, System.EventArgs e)

{

dataSet21.Clear(); DataGrid1.DataSource=””; sqlConnection1.Open(); sqlDataAdapter3.Fill(dataSet21,”FreqFl”);

DataView source=new DataView(dataSet21.Tables[“FreqFl”]);

DataGrid1.DataSource=source;

DataGrid1.DataBind();

sqlConnection1.Close();

}

The FreqFl.aspx Form

The FreqFl.aspx form is used for enabling the frequent flier program. This form is very similar to the Reports.aspx form in its appearance and functionality. The FreqFl.aspx form enables two types of frequent flier programs. In the first program, customers who have flown the airline more than a predetermined number of times are given discounts. In the second program, customers who have paid more than a specified fare are given discounts.

To create the frequent flier programs, I have added an SqlConnection1 control to the form. Next, I have written the following function for enabling discounts to customers based on the number of times that they have flown the airline:

private void Button2_Click(object sender, System.EventArgs e)

{

lblMessage.Text=””; DataGrid1.DataSource=””;

SqlCommand Command1= new SqlCommand(“INSERT INTO dtFrequentFliers Select

EMail, Discount=”+lstDisc1.SelectedItem.Text+ “ from dtPassengerDetails where TotalTimesFlown > “+ lstTimesFlown.SelectedItem.Text, sqlConnection1);

sqlConnection1.Open(); Command1.ExecuteNonQuery(); lblMessage.Text=”Done.”;

SqlDataAdapter DataAdapter = new SqlDataAdapter(“SELECT * from dtFrequentFliers”, sqlConnection1);

DataSet ds= new DataSet();

DataAdapter.Fill(ds);

DataView source = new DataView(ds.Tables[0]);

DataGrid1.DataSource=source;

DataGrid1.DataBind();

sqlConnection1.Close();

}

In the preceding code, I have assigned an SQL query to an object of the SqlDataAdapter class.The query is run and the rows returned are stored in an object of the DataSet class. These rows are displayed on the form by using the DataGrid1 control.

The code for the second frequent fliers program is very similar to the code for the frequent flier program already shown. However, the query that is used for retrieving the records from the database is different. The complete code of the function that retrie ves passengers for the frequent fliers program on the basis of the fare that they have paid is given as follows:

private void Button1_Click(object sender, System.EventArgs e)

{

lblMessage.Text=””;

if (txtFare.Text==”” || txtFare.Text==null)

{

lblMessage.Text=”Invalid parameter for fare collected.”; return;

}

DataGrid1.DataSource=””;

SqlCommand Command1= new SqlCommand(“INSERT INTO dtFrequentFliers Select EMail, Discount=”+lstDisc2.SelectedItem.Text+ “ from dtPassengerDetails where FareCollected > “+ txtFare.Text, sqlConnection1);

sqlConnection1.Open(); Command1.ExecuteNonQuery(); lblMessage.Text=”Done.”;

SqlDataAdapter DataAdapter = new SqlDataAdapter(“SELECT * from dtFrequentFliers”, sqlConnection1);

DataSet ds= new DataSet();

DataAdapter.Fill(ds);