3160 Vocab Exam II

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allows you to indicate that the user has entered an invalid value by displaying a blinking error icon next to a specific control.

ErrorProvider Component

a method that you can call to specify which control you want the error to display beside

SetError Method

allows you to create a user interface that is made of multiple pages, with each page containingits own set of controls.

TabControl

controls contained inside the TabControl

TabPage Control

contains data that has not been converted to text.

Binary File

contains data that has been encoded as text, using a scheme such as Unicode.

Text File

A file from which data is read

Input file

A file that data is written to

Output file

question

StreamWriter Object

used to write a line of text to a file.

StreamWriter

used to read data from a text file

StreamReader

used to read a line of text from a file.

ReadLine method

reads only the next character from standard input

Read Method

used to write a line of text to a file using a newline character

WriteLine

writes data to a file without using the newline character

Write Method

signals whether the end of the file has been reached.

EndOfStream

The bin/debug folder

Default file locations

If the user clicked the Open button, this value is returned.

DialogResult.Ok

If the user clicked the Cancel button, this value is returned.

DialogResult.Cancel

The place where the file's path and filename are stored

Filename Property

An object used in order to use random numbers

Random Object

used to get a random integer number.

Next Method

When an application’s form loads into memory

Load Event

Breaks a program into smaller units of code, simplifying it.

Modularization

performs a task and then terminates.

Void Methods

it executes the statements that it contains and then it returns a value back to the statement that called it.

Value Returning Methods

appears at the beginning of a method definition, lists several important things about the method, including the method’s name

Method Header

Calls a method that is then executed.

Method Call

you declare a reference parameter by writing this before the parameter variable’s data type.

Ref keyword

you declare an output parameter by writing this before the parameter variable's data type

Out keyword

ints doubles and decimals

Value Types

A variable that is used to reference an object

Reference Types

creates an object in memory and returns a reference to that object

new Operator

an array that can hold multiple sets of data in rows and columns

2D Array

Similar to 2D arrays, except rows can have a different amount of columns

Jagged Array

used to iterate over the items in a list

foreach loop

container for holding other objects

List Object

a data structure for storing and retrieving images.

ImageList control

holds the number of items stored in the List .

Count Property

performs a sequential search to locate the specified item.

IndexOf Method

Reports the zero-based index position of the last occurrence of a specified Unicode character or string within this instance.

LastindexOf Method

The method returns true if ch is an uppercase letter or false otherwise.

IsUpper Method

converts the case of the character

ToUpper/ToLower Methods

The method returns true if the specified character is a white-space character or false otherwise.

IsWhiteSpace Method

Retrieves a substring from a string

SubString Method

removes all leading and trailing spaces from a string

Trim Method

The process of breaking a string into tokens

Tokenizing

items of data, such as a string of words or numbers

Tokens

the character that separates tokens, such as commas, spaces, or semicolons

Delimiters

extracts tokens from the string and returns them as an array of strings.

Split Method

data types that you can create

Enumerated Data types

Each form has its own class that can be instantiated and displayed on the screen.

Multiple Forms

When this form is displayed, no other form in the application can receive the focus until the modal form is closed

Modal Form

allows the user to switch focus to another form while it is displayed

Modeless Form