C# Code Notes (Volume 1)

Volume1.cs

// Init a data type
int intName;
string stringName;
double doubleName;
float floatName;

// Creates a CONST variable - cannot be modified, or reassigned
const int intName;

// Show a MessageBox
MessageBox.Show("Main Message", "Caption", MessageBoxButton.OKCancel, MessageBox.Error);

// IF Statement
if (true)
{
  // IF STATEMENT IS (=) TRUE
} else {
  // IF STATEMENT NOT (!=) TRUE
}

// Take a STRING input from XAML Display
string stringInput = stringInputBox.Text;

// Take an INT input from XAML Display using PARSE
int intInput = int.Parse(stringInput.Text);

// Take an INT input from XAML Display using TRYPARSE
int intInput
int.TryParse(numberInput.Text, out intInput);

// CASE / SWITCH
    // Used instead of IF
int yearLevel = 11;
switch (yearLevel)
{
    case 12: locationBox.Text = "Please go to the Centennial Wing, North end";
        break;
    case 11: locationBox.Text = "Please go to the Centennial Wing, South end";
        break;
}

// FOR LOOP
for (int count = (startnumber); count < (maxnumber); count+(increasebynumber))
{
  counterDisplay.Text = i
}

// DO LOOP (Test condition at END)
int count = start;
do
{
  countDisplay.Text += "\r\n" + 1;
  count+=1;
} while (count<10);
  
// WHILE LOOP (Test condition at START)
int count = start;
while (count<10)
{
    countDisplay.Text += "\r\n" + count;
    count+=1;
}

// Data Types
string  // STRING of characters, a sentence     , Size (bits)   16 per Char
int     // a WHOLE number                       , Size (bits)   32
double  // an EXACT number                      , Size (bits)   64
bool    // TRUE or FALSE, 1 or 0, ON or OFF     , Size (bits)   8
float   // FLOATING-POINT numbers               , Size (bits)   32
long    // WHOLE number (bigger range)          , Size (bits)   64
char    // a CHARACTER                          , Size (bits)   16
decimal // MONETARY values                      , Size (bits)   128

// PRINT to a TextBox
outputTextBox.Text = "Outputed Text";

// PRINT custom string to TextBox
value = 13452928
outputTextBox.Text = value.ToString("$#,##0;$(#,##0)");

// PRINT to a TextBox, and to a New Line every time
countedOutput.Text += "\r\n" + "Outputted text";

// SCOPES - PRIVATE and PUBLIC
    // PRIVATE can only be called upon in the surrounding method,
    // whereas PUBLIC can be called upon in every method
    
// Defining Methods - 
    //NORMAL - End of code
    void add2numbers(int int1, int int2)
        {
            int sum = int1 + int2;
            MessageBox.Show("The sum of " + int1.ToString() + " + " + int2.ToString() + " = " + sum.ToString());
            return;
        }
    
    //RETURN A VALUE - Use if not end of code
    private int subtract2numbers(int int1, int int2)
    {
        int diff;
        diff = int1 - int2;
        return diff;
    }

// CLOSE a program
Close();