Chapter 2: Intro to Visual C#

Question 1

A visual C# application project starts with creating its GUI with:

Answer 1

1) Designer
2) Toolbox
3) Properties window

Question 2

In the Designer, an empty form is automatically created

Answer 2

1) An application’s GUI is made of forms and controls
2) Each form and control in the application’s GUI must have aname as ID.

Question 3

Each form and control in the application’s GUI must have aname as ID. The default blank form is named

Answer 3

“Form1” automatically

Question 4

The default empty form has a dimension (size) of

Answer 4

Pixels wide by pixels high

Question 5

A form in Designer is enclosed with

Answer 5

Thin dotted lines called the bounding box

Question 6

The bounding box has small sizing handles; you can use them

Answer 6

To resize the form

Question 7

The appearance and the other characteristics of a GUI object are determined by

Answer 7

The object’s properties

Question 8

The Properties window lists all properties

Answer 8

When selecting an object, its properties are displayed in Properties windows

Question 9

Each property has 2 columns

Answer 9

1. Left: Property’s name
2. Right: Property’s value

Question 10

Changing a Property’s Value select an object, such as

Answer 10

The Form, by clicking it once

Question 11

Click View and select Properties if the Properties window is

Answer 11

Not available

Question 12

Find the property’s name in the list and change its value

Answer 12

1) The Text property determines the text to be displayed in the form’s title bar
2) Example: Change the value from “Form1” to “My First Program”

Question 13

Adding Controls to a Form: In the Toolbox, select the Control, then you can either:

Answer 13

1. Double click the Button control
2. Click and drag the button control to the form

Question 14

On the form, you can

Answer 14

1. Resize the control using its bounding box and sizing handles
2. Move the control’s position by dragging it
3. Change its properties in the Properties window

Question 15

Rules for Naming Controls

Answer 15

Control’s names are identifiers of the controls

Question 16

The naming convention are:

Answer 16

1) The first character must be a letter (lower or uppercase, does not matter) or an undercore
2) All other characters can be alphanumerical characters or underscores
3) The name cannot contain spaces

Question 17

Creating the GUI for Your First Visual Application Component:

Answer 17

A form and a Button control

Question 18

Creating the GUI for Your First Visual Application Component purpose:

Answer 18

1) Create the application’s GUI
2) Write the code that causes “Hello World” to appear when the user clicks the button (details are available in)

Question 19

C# code is primarily organized in three ways:

Answer 19

1) Namespace: a container that holds classes
2) Class: a container that holds methods
3) Method: a group of one or more programming statements that perform some operations

Question 20

A file that contains program code is called

Answer 20

A source code file

Question 21

Each time a new project is created the following two source code files are automatically created:

Answer 21

1) Program.cs file
2) Form1.cs file

Question 22

Program.cs file

Answer 22

Contains the application’s start up code to be executed when the application runs

Question 23

Form1.cs file

Answer 23

Contain code that is associated with the Form1 form

Question 24

A sample of Form1.cs:

Answer 24

1. The using directives indicate which namespaces of .NET Framework this program will use
2. The user-defined namespace of the project not .NET Framework namespaces
3. Class declaration
4. A method

Question 25

C# code is organized as

Answer 25

Methods, which are contained inside classes, which are contained inside namespaces

Question 26

GUI applications are event-driven which means they interact with

Answer 26

Users

Question 27

A event is a user’s action such as

Answer 27

Mouse clicking, key pressing, etc.

Question 28

Double clicking a control, such as Button, will link the control to a default Event Handler

Answer 28

1) An event handler is a method that executes when a specific event takes place
2) A code segment similar to the following will be created automatically

Question 29

A message box (aka dialog box)

Answer 29

Displays a message

Question 30

The .NET Framework provides a method named

Answer 30

MessageBox.Show()

Question 31

C# can use it to pop up

Answer 31

A window and display a message

Question 32

Placing it in the “myButton_Click” event handler can display the string in the message box when

Answer 32

The button is clicked

Question 33

Label Controls displays

Answer 33

Text on a form and can be used to display unchanging text or program output

Question 34

Commonly used properties are:

Answer 34

1) Text
2) Name
3) Font
4) BorderStyle
5) AutoSize
6) TextAlign

Question 35

1) Text

Answer 35

Gets or sets the text associated with label control

Question 36

2) Name

Answer 36

Gets or sets the name of label control

Question 37

3) Font

Answer 37

Allows you to set the font, font style, and font size

Question 38

4) BorderStyle

Answer 38

Allow you to display a border around the control’s text

Question 39

5) AutoSize

Answer 39

Controls the way they can be resized

Question 40

6) TextAlign

Answer 40

Set the text alignments

Question 41

Handling Text Alignments

Answer 41

1) The TextAlign property supports the following values
2) You can select them by clicking the down-arrow button of the TextAlign property

Question 42

By adding the bold lines to a button’s event handler, a Label control can display

Answer 42

Output of the application

Question 43

Equal sign (=) is known as

Answer 43

Assignment operator

Question 44

IntelliSense provides automatic code completion as you write

Answer 44

Programming statements

Question 45

It provides an array of options that make language references

Answer 45

Easily accessible

Question 46

PictureBox controls

Answer 46

Displays a graphic image on a form

Question 47

Commonly used properties are:

Answer 47

1) Image
2) SizeMode
3) Visible

Question 48

1) Image

Answer 48

Specifics the image that it will display

Question 49

2) SizeMode

Answer 49

Specifies how the control’s image is to be displayed

Question 50

3) Visible

Answer 50

Determines whether the control is visible on the form at run time

Question 51

Programmers need to carefully arrange the sequence of statements in order to

Answer 51

Generate the correct results

Question 52

Incorrect arrangement of sequence can cause

Answer 52

Logic errors

Question 53

Comment are brief note that are placed in

Answer 53

A program’s source code to explain how parts of the program work

Question 54

A line comment appears on one line in

Answer 54

A program

Question 55

A block comment can

Answer 55

Occupy multiple consecutive lines in a program

Question 56

Programmer frequently use blank lines and identation in their codes

Answer 56

To make the code more human readable

Question 57

Dealing with Syntax Errors

Answer 57

Code editor examines each statement as you type it and report any syntax error that are found

Question 58

If syntax error is found, it is underlined with

Answer 58

A jagged line

Question 59

If syntax error exists and you attempt to

Answer 59

Compile and execute, you will see the following.