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Visual Basic

Introduction to VB.NET

.NET Framework

VS2008 IDE

How VB is Compiled

Start Visual Studio


Windows Form App


Save Your Work

VB OOP Programming

Visual Basic Code


Exit Code


Button Event Code

Coding Recommendations

If/Then/Else

Error List Window

Comment Syntax

Help Window

Language Essentianl

Built-In Data Types


Declare Variables

Declare Constants

Code Arithmetic Expressions

Assignment Statements

Operator Precedence

Type Casting


Math Class

String Declaration

Conversion Functions

Conversion Methods

Formatting Functions

String Formatting


Variable Scope

Enumerations

Nullable Types


Loop Constructs

For Next Loop

Do While Loop


Do Until Loop

Do...Loop-While

Do...Loop-Until


Exit Do | Exit For

Do...Loop


Nested Loops


Arrays

Array Declaration


Rnd( ) Function

Listbox Control


KeyPressEventArgs


Parallel Arrays

Key Event Args


Dynamic Arrays

Redimension Array

Set Breakpoint

Start Debugger


ReDim Preserve


MultiDimensional Arrays

DataGridView Control


Length and Sort Methods


Structures

Pad Right

Split Method

IsNumeric Function


Multiform Projects


Add Form To Project

Form Object Methods

Form Show Method

ShowDialog Method

Form Close Method

Form Accept Button

Multiform Project Example


ASP.NET Web Programming

Create Data Source


Configure Access Data Source


Add Product Class


Extract Local Database Data

Order PageLoad VB Code

Add New Web Page


Set Start Page

Display Cart Aspx Code

Display Cart Design View

Sorted List Definition

VB.NET Session State


Create CartItem Class

GetCartContents Function


Add To Cart Event Handler

Remove Cart Item Event


Clear Cart Event Handler



How to Design a Windows Forms Application

From the Microsoft Visual Studio Start Page, select File → New Project as indicated in the diagram below:

File → New Project

Figure VB-7: Visual Studio File → New Project


Visual Studio will bring up the New Project Template Selector as illustrated in the diagram below:

VB Form App

Figure VB-8: Microsoft Visual Basic New Project Form Application


As indicated in Figure VB-8 perform the following 5 steps:

  1. Select Visual Basic as the project language.
  2. Select Windows as the project type.
  3. Select Windows Forms Application as the Visual Studio Installed Template.
  4. Change the Name: to InvoiceTotal1 in the Project Name TextBox.
  5. Press OK.

After performing the preceding steps - the Visual Basic Design View window will appear on your screen as illustrated in the diagram below:

Design View

Figure VB-9: Visual Basic Design View Screen


Some terms that we will be referencing at a later point in the guide illustrated in Figure VB-9 are:

  • File Selection Menu: Menu options performing system actions such as Save Project
  • Debug Program: Icon to test our Visual Basic program.
  • Design Tabs: Selectors to move between Source code and Forms
  • Design Form: User Interface.
  • Control Toolbox: Templates for control to be placed on the form.

Select Toolbox → Common Controls as indicated in the diagram below:

Toolbox Common Controls

Figure VB-10: Visual Basic Toolbox Common Controls


  1. Left-Click the Toolbox: to make it visible.
  2. Left-Click the '+' on Common Controls: to expand the Common Control Toolbox Menu.

After the Common Controls Toolbox subsection is opened the Visual Studio Integrated Development Environment should appear as illustrated in the diagram below:

Select Toolbox

Figure VB-11: Visual Basic Common Controls Toolbox Selecting TextBox Control


A Textbox Control needs to be placed on the Design Form in the approximate location indicated in Figure VB-11. The procedure for placing a control on the Design Form, which is located in the Toolbox is as follows:

  1. Position Mouse Pointer over the desired control in the Toolbox.
    • Windows will highlight the currently selectable control.
  2. Press and Hold the left mouse button once the desired control has been highlighted.
    • Windows will give a short description of the features of the control with a pop-up message.
    • In this case the messsage says: "Enables the user to enter text, ...
  3. Drag Control to the approximate location on the design form.
    • More precise positioning can be performed after the toolbox control is placed on the Design Form.
  4. Release Left Mouse Button to complete the initial control placement procedure.

Once the TextBox control is placed on the Design Form. We can faciliate placement of the remaining controls by locking the Toolbox menu in the Open Position by Left-Clicking on the Thumb Tack and having the needle point downward as illustrated in the diagram below:

Lock Toolbox

Figure VB-12: Lock Visual Studio Toolbox in Open Position


Once you have locked the toolbox in the open position, you are ready to finish placement of your controls. Press Next to continue the Windows Forms Application development guide:


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