CS 2340 Programming in VB.NET Instructor: Dr. Qi Yang Office: 213 Ullrich Phone: YangQ 1

Web Sites

Three VB.NET Courses CS 2340: Programming in VB.NET Prerequisite: CS 1430 CS 3340: Windows Programming Prerequisite: CS 2340 & CS 2430 or CS 2630 CS 3870: Web Protocols, Technologies and Applications Prerequisite: CS 3340 Co-requisite: CS 3630 (Database) 3

CS 2340: Course Description An introduction to event driven, object oriented programming techniques in VB.NET. Students will design, code, and debug Graphic User Interface (GUI) programs and apply the techniques to business applications. 4

CS 2340: Course Outcomes Upon completion of this course, students should be able to Design and develop Graphical User Interfaces; Understand and code Event-Driven procedures; Program Visual Basic controls proficiently; Access database from VB.NET programs; and Design, develop and test Visual Basic programs. 5

CS 2340: Textbook Beginning VB.NET, 2 nd Edition, Wrox Not.NET

CS 2340: Course Work 8 Labs 160 (10 – 30 each) 6 Tests 200 (20 – 40 each) 1 Project 40 Total 400 7

Course Grading Course Grade Points Percentage Grade Points A % 4.0 A % 3.7 B % 3.3 B % 3.0 B % 2.7 C % 2.3 C % 2.0 C % 1.7 D % 1.3 D % 1.0 F below No Curve 8

Hands-on Tests In all three VB courses Paper published in Journal of Information Systems Education Volume 16, Number 2, Summer

CS 2340 Programming in VB.NET Different Backgrounds If you have a very good background You should get an A You may not get an A Else If you have a good background You do not want to get a D Else (Don’t have any background in VB) You can get an A! Come to class every day and do your work! 10

CS 2340 Programming in VB.NET Every one could get an A! That has never happened! Every one should pass CS 2340! That has never happened either! Our Slogan: Just Do It! 11

Lab 1 10 points Due 9 PM, Monday, September 10, 2012 No Grace Time! 12

MS Visual Studio 2010 Every PC in Ullrich Free Copy on your PC Will receive about it Follow instructions to get your copy 13

Create a VB.NET Solution Start MS Visual Studio 2010 New Project… Visual Basic Windows Windows Form Application Name: YangQ_Lab1 Create directory for solution: Uncheck 14

Save Project and Solution Make sure you know where is your program! Save all Create Solution folder: Uncheck Browse location Could change project / solution names Check program location 15

MS Visual Studio IDE (Integrated Development Environment) Title Bar Menu Bar Tool Bars Solution Explorer Properties Window ToolBox Auto Hide... 16

Form Properties Form - Window Text Size FormBorderStyle StartPosition WindowState... 17

Properties Window Properties Events Alphabetical Categorized 18

ToolBox Most controls available on ToolBox Tabs on ToolBox All Windows Forms Common Controls Putting a control on form Double Click Drag and Drop 19

Windows Controls TextBox Get Input Display Output Label Display Information / Output Button User action... 20

Click Event The button’s Click Event Users click a button when they want to do something. Event Procedure VB function that will be called when the event happens We will write the event procedure Click Event procedure template Double click the button 21

Declaring Variables Dim theName As String theName = txtName.Text ‘ This is comment ‘ To remove spaces from both ends theName = txtName.Text.Trim() We should get variable values from controls at the beginning, then use the variables, not the controls, in the code. 22

Class MessageBox Method Show MessageBox.Show(“Please Enter Your Name”) Caption (Title), MessageBoxButtons and MessageBoxIcon MessageBox.Show("Enter Your Name Please!", _ "Lab 1", MessageBoxButtons.OK, _ MessageBoxIcon.Exclamation) Line continuation char: “ _” VB has NO statement terminator 23

String Operations ‘ Operators “&” and “+” append strings MessageBox.Show("Hello, " & theName + "!”) MessageBox.Show("Hello, " & theName + "!", "Lab 1”, _ MessageBoxButtons.OK, _ MessageBoxIcon.Information) 24

If Statement If theName = "" Then MessageBox.Show("Enter Your Name Please!", "Lab 1", _ MessageBoxButtons.OK, _ MessageBoxIcon.Exclamation) Else MessageBox.Show("Hello, " & theName + "!", "Lab 1", _ MessageBoxButtons.OK, _ MessageBoxIcon.Information) End If 25

The Click Event Procedure Pseudo Code Private Sub btnHello_Click(...) Handles btnHello.Click ‘ Declare variable(s) ‘ Get input ‘ If empty input ‘ Display a message ‘ Else ‘ Display a different message End Sub 26

The Click Event Procedure Private Sub btnHello_Click(...) Handles btnHello.Click Dim theName As String theName = txtName.Text.Trim() If theName = "" Then MessageBox.Show("Enter Your Name Please!", "Lab 1", _ MessageBoxButtons.OK, _ MessageBoxIcon.Exclamation) Else MessageBox.Show("Hello, " & theName + "!", "Lab 1", _ MessageBoxButtons.OK, _ MessageBoxIcon.Information) End If End Sub 27