BIS 311 DeVry Week 7 I Lab

BIS 311 DeVry Week 7 I Lab
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Question Description
BIS 311 DeVry Week 7 iLab
BIS311
BIS 311 DeVry Week 7 iLab
iLAB OVERVIEW
Scenario/Summary
In this lab, you will create a two-tier application that retrieves the name and price of a product from a Microsoft Access
database.
Product Lookup Business Requirements
The user enters the product ID for a product. The application searches the Products table of a Microsoft Access
database named Inventory.accdb for the specified product. If a matching product is found, its name and price are
displayed. If the product is not found, the message "Product ID not found" is displayed.
TOE Chart for Product Lookup User Interface
Task Object Event
Get the following inputs from the user:
Product ID
txtProductID
Perform the following processing:
Retrieve product data from database using product ID
Display the following output to the user:
If the product ID was found: Product name and price
If the product ID was not found: "Product ID not found"
btnFindProduct
dataSvc
lblProductName,
lblProductPrice
lblMessage
Click
Pseudocode for Product Lookup User Interface
Start button-click event handler
Instantiate dataSvc object from DataService class
Declare Boolean variable ProductFound
Get ProductID property of dataSvc from user

ProductFound= result of GetProduct() method of dataSvc
if ProductFound is True
Display Product name and Product price
Else Display "Product ID not found"
Stop button-click event handler
Class Diagram for DataService Class
DataService
+numeric ProductID
+string ProductName
+string ProductPrice
GetProduct()
Pseudocode for GetProduct() Method of DataService Class
Boolean GetProduct()
Instantiate DataSet object for the Inventory database
Instantiate TableAdapter object for the Products table in the Inventory database
Declare Boolean variable Found
Use the Products TableAdapter object to retrieve the Products record matching ProductID into the Inventory DataSet
object
If the count of Products records in the Inventory DataSet > 0
Set ProductName=ProductName field of the first retrieved record
Set ProductPrice=ProductPrice field of the first retrieved record
Set Found=True
Else
Set Found = False
Return Found
End GetProduct()
Remember This
In a true client-server application running on a network, the code in the DataService class would be executed on the
server (the data-services tier), and the form would be executed on the client (the user-interface tier). In this lab, both
the DataService class and the form will be executed on the same computer.
Deliverables
Submit a Word document named Lab7YourFirstLastName.docx (where YourFirstLastName = your first and last name;
e.g., Lab7JohnSmith.docx) containing the following.
Screenshot of form showing the application running, with a valid product ID entered and the corresponding
product name and price displayed
Screenshot of form showing the application running, with an invalid product ID entered and the message
"Product ID not found" displayed
Copy of code for button-click event
Copy of code for DataService class

Category Points % Description
Create and rename form,
add controls, and set 15 30%
properties
Create
database
connection, dataset, and 10 20%
query function
Code data service class 5 10%
Windows form was created and named ProductLookup.vb. Form text
property was set to Lab 7 Your Name (where Your Name = your full
name). The following controls were added to the form: Identifying
label and text box for entry of product ID; button to perform product
lookup; and labels for display of product name, product price, and
error message. Name and text properties of all controls were set
appropriately, with no typos or spelling errors.
A connection to the Inventory database and an associated dataset
containing the Products table were created. A FillByProductID()
method using an SQL query to retrieve a product record with a
specified product ID has been added to the Products table adapter.
A DataService class was created with code that corresponds to the
given class diagram and pseudocode, with no errors. Class includes
public properties for the product ID, product name, and product price,
and a GetProduct() method that retrieves the product name and price
for a specified product ID and returns a Boolean value indicating
success or failure. Code button-click event 5 10% Button-click event
code was entered that corresponds to the given pseudocode, with no
syntax errors. An object of the DataService class is instantiated and
used to retrieve the product name and price for the product ID entered
by the user. The name and price are displayed if the product record
was found, or the "Product ID not found" message otherwise.
Test-run
successfully
application
15 30%
Application is shown running successfully with screenshots for each
of the 4 cases: cases 1–3 each show a valid product ID entered with
correct name and price displayed; case 4 shows an invalid product ID
entered with "Product ID not found" message displayed.
Total 50 100%
Required Software
Visual Studio 2012
Access the software at.devry.edu/">https://lab.devry.edu.
Steps: all
iLAB STEPS Step 1: Create Project and Form
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(a) Important: Before beginning this lab, download the Microsoft Access database file Inventory.accdb from Doc Sharing
and save it to your Downloads folder or on your computer desktop. Don't open the file from Doc Sharing, just save it
and make a note of where it is located. If it downloads automatically when you click on it in Doc Sharing, it is most likely
saved in your Downloads folder, but check to make sure. You will need to be able to locate this file to create a data
connection to it in Step 2.
(b) Log in to the Citrix iLab site as you did in the previous labs. Click the Microsoft Visual Studio 2012 icon to launch
Visual Studio.
(c) Pull down the File menu and select New Project . . .
(d) In the New Project dialog, ensure that under Templates in the left column, Visual Basic is selected, and that in the
center column, Windows Form Application is selected. In the Name field at the bottom of the dialog, enter
ProductLookup. Click OK.

(e) In the Solution Explorer pane on the right side of the screen, right-click on Form1.vb, select Rename, and change
the name to ProductLookup.vb. Press Enter after entering the new form name.
(f) Change the Text property of the form to Lab 7 Your Name (where Your Name = your full name), as you have done
in previous labs.
(g) Drag the following controls from the ToolBox onto the form, arrange them in a logical fashion, and set their properties
as indicated in the table below.
Control Name Property Text Property
Label Label1 Product ID:
TextBox
txtProductID
Button btnFindProduct Find Product
Label Label2 Product name:
Label lblProductName ????????
Label Label3 Product price:
Label lblProductPrice ????????
Label lblMessage Ready
(h) Ensure that the controls are positioned and sized so that the form has a neat, professional appearance and none
of the text is cut off. Your completed form should look like the following.
Step 2: Create Database Connection and Dataset
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(a) Pull down the Project menu and select Add New Data Source.
(b) The Data Source Configuration Wizard should appear. On the first screen, select Database and click Next.
(c) On the next screen, select Dataset and click Next.
Step 3: Create SQL Query Method
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(a) In the Solution Explorer pane on the right, double-click the InventoryDataSet.xsd file to open it in the dataset design
window. Right-click on ProductsTableAdapter, select Add, then select Query.
(b) The TableAdapter Query Configuration Wizard appears. On the Choose a Command Type screen, ensure that the
Use SQL Statements option is selected, and click Next.
(c) On the Choose a Query Type screen, ensure that the option "SELECT which returns rows" is selected, and click
Next.
(d) On the Specify an SQL SELECT statement screen, add the clause WHERE ProductID=? at the end of the displayed
SQL statement. This enables your query to retrieve a Product record with a specific ProductID, rather than returning all
the records. Click Next.
(e) On the Choose Methods to Generate screen, ensure that the checkbox next to Fill a DataTable is checked, and
uncheck the checkbox next to Return a DataTable. Change the Method name under Fill a DataTable to FillByProductID.
Click Next.
(f) The Wizard Results screen should confirm that the SELECT statement and Fill method were generated with no
errors. Click Finish.
(g) Pull down the File menu and select Save All. If a Save Project dialog appears, ensure that the project is saved to
the My DocumentsVisual Studio 2012Projects folder under your DSI number. Click Save.

(h) Click the X on the right of the InventoryDataSet.xsd tab to close the dataset design window.
Step 4: Create DataService Class
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(a) Pull down the Project menu, select Add Class, and add a new class file named DataService.vb to your project.
(b) Starting where the cursor is positioned, in between the Public Class Order and the End Class statements, enter the
following code.
Code for DataService Class
'Data access services class
Public Property ProductID As Integer
Public Property ProductName As String
Public Property ProductPrice As Decimal
Public Function GetProduct() As Boolean
'Get product data from database for product matching ProductID
Dim productsTA As New InventoryDataSetTableAdapters.ProductsTableAdapter
Dim inventoryDS As New InventoryDataSet
Dim blnFound As Boolean
productsTA.FillByProductID(inventoryDS.Products,ProductID)
If inventoryDS.Products.Count > 0 Then
ProductName = inventoryDS.Products(0).ProductName
ProductPrice = inventoryDS.Products(0).ProductPrice
blnFound = True
Else
ProductName = ""
ProductPrice = 0
blnFound = False
End If
Return blnFound
End Function
(c) After entering the above code, your code editor window should look like this.
Step 6: Test, Debug, and Submit
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(a) Run the application by doing one of the following: click the Start button; pull down the Debug menu and select Start
Debugging; or press the F5 key.
(b) Your form should appear. Test your application by entering the following test cases. For each test case, enter the
indicated value for Product ID; click the Find Product button; and check that the result displayed is correct. Capture a
screenshot of each correct test case and paste it into a Word document. Remember, use CTRL+ALT+PrintScreen to
capture a screenshot.
Test case # Product ID Product name Product price Message

1 123 Road bike $499.95 Product ID found
2 456 Mountain bike $359.95 Product ID found
3 789 Town bike $579.95 Product ID found
4 999 Product ID not found
As an example, your screenshot for test case #1 should look like the following.
(c) If your application does not work correctly, debug the application and try again. Post in the Q & A Forum or contact
your professor for assistance, if needed.
(d) When your application works correctly for all test cases, select and copy all the code for the button-click event
handler and the DataService class and paste it into your Word document below the test case screenshots. Save the
Word document as Lab7YourFirstLastName.docx (where YourFirstLastName = your first and last name; e.g.,
JohnSmith) and submit it to the appropriate dropbox.