Whastapp ListBox KeyPress KeyDown Leave DateTime.Now KeyValue
We built a chat Application (like Whatsapp, is typing …)
We learned how to add ListBox and more events into our WinForm application.
More topics covered:
Links:
Calculator Button TextBox Click-Event Debug.WriteLine
We built our first calculator in Windows Form Application
We learned how to add buttons and click events into our WinForm application.
More topics covered:
Links:
Functions advanced, WinForm application, String, boolean
We learned the String and Boolean types and some basic usage.
We saw functions advanced features:
(See C# 5.0 IN A NUTSHELL: page 42)
– Arrays as parameter
– int (primitive) as parameter
– ref
– out
– default values
– params
– destructuring parameters
We created our first Window Forms application
– Hello world!
– Colored in Green 🙂
Links:
Functions, Memory Game, WriteLine($), C# website
Cool site to run c# code from the web: https://dotnetfiddle.net/
We learn how to use Console.WriteLine with $. for example:
int x = 10;
Console.WriteLine($”x is equal to : {x}”)
Memory Game project – due date 19/12/2018!
Functions:
– Use to module our code , and re-use the code
– Used with input parameters
– Used with return value
Arrays, code snippets
Introduction to Arrays: array is a storage for many elements in a same collection. i.e. list of 100 grades for a class
Array types:
– single dimension []
– matrix[,]
– jagged[][]
Initialize an array: i.e. array of 10 integers:
int[] grades = new int[10];
Get the array length: grades.length
for loop on the array:
for(int i = 0; i < grades.length; i++) { … }
Code Snippets:
Code snippets are used to paste code into the visual studio with a keyboard shortcut. i.e. “cw” + tab + tab write Console.WriteLine()
So, we can make our on shortcuts. In class we made an example of making a keyboard shortcut “ccr” which pastes:
Convert.ToInt32(Console.ReadLine());
see the video…
Exam Day
Questions in the topic of:
– while, do-while, for, prime numbers
– printing triangle horizontally and vertically
Minimum grade to pass: 70%
do-while, continue, break, prime numbers
Topics:
– Learning do-while: same as while except that a first iteration will always occur!
– continue-break out of loops:
continue: will skip to the next iteration
break: will exit the loop
– checking if a number is a prime number or not: run from 2 to number-1 and look for a divider which returns module of zero
functions, random, switch-case, GITHUB
Introduction to:
– writing our own functions: code inside a named paragraph
– generating Random numbers: using Random class
– switch-case: ease the long if-else
– building our first card GAME
– introduction to GITHUB repository: FREE cloud storage for our code!
for loop, nested for, calculator, if-else-if
introduction to new concepts:
– for loop: used to iterate over a predefined range of numbers
– nested for: for inside a for
– if else else-if: use a condition on a negative flow
– building our first calculator
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if, while, WriteLine, ReadLine, Convert.ToInt32
C# program with more topics:
– if: condition
– if else: condition and false result
– while loop
– WriteLine to the screen
– ReadLine: reads the user input from the keyboard
– Convert.ToInt32: converts a text to an integer (since ReadLine returns a string)
.NET Experts 