Check out example codes for "c# convert to int". It will help you in understanding the concepts better.

Code Example 1

Int16.Parse("100"); // returns 100
Int16.Parse("(100)", NumberStyles.AllowParentheses); // returns -100

int.Parse("30,000", NumberStyles.AllowThousands, new CultureInfo("en-au"));// returns 30000
int.Parse("$ 10000", NumberStyles.AllowCurrencySymbol); //returns 100
int.Parse("-100", NumberStyles.AllowLeadingSign); // returns -100
int.Parse(" 100 ", NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite); // returns 100

Int64.Parse("2147483649"); // returns 2147483649

Code Example 2

int i = 0;

// bool to Int32
bool b = true;
i = Convert.ToInt32(b);

// byte to Int32
byte bt = 3;
i = Convert.ToInt32(bt);

// char to Int32
char c = 'A';
i = Convert.ToInt32(c);

// DateTime to Int32
DateTime dt = DateTime.Now;
i = Convert.ToInt32(dt);

// Decimal to Int32
decimal d = 25.678m;
i = Convert.ToInt32(d);

// double to Int32
double db = 0.007234;
i = Convert.ToInt32(db);

Code Example 3

var myInt = int.Parse("123"); // this one throw exception if the argument is not a number
var successfullyParsed = int.TryParse("123", out convertedInt); //this returns true if the convertion has been successfully done (integer is stored in "convertedInt"), otherwise false.

Code Example 4

string userInput = Console.ReadLine();
int convert;
Int32.TryParse(userInput, out convert);  // Converting String to int

Code Example 5

Int16.Parse("100"); // returns 100
Int16.Parse("(100)", NumberStyles.AllowParentheses); // returns -100

int.Parse("30,000", NumberStyles.AllowThousands, new CultureInfo("en-au"));// returns 30000
int.Parse("$ 10000", NumberStyles.AllowCurrencySymbol); //returns 10000
int.Parse("-100", NumberStyles.AllowLeadingSign); // returns -100
int.Parse(" 100 ", NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite); // returns 100

Int64.Parse("2147483649"); // returns 2147483649

Code Example 6

    string str = "10s";
 
    int x = Convert.ToInt32(str);
	Console.WriteLine(x);

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