Convert

Question

I'm very new to c#, and want to be able to take a string from a textbox, convert it to int, do some calculations with it, then convert it back to string.

Presuming A is the string value and b is the int value, what piece of code would perform the conversion, and then back again.

thanks

Answer 1

string a = Textbox.Text;
int b = int.Parse(a);
b = b * 2 + 7;
Textbox.Text = b.ToString();

 

Cheers,

Greg

Answer 2

On top of what Greg has stated, if there is a chance that the TextBox contains text that isn't a number (which if users are entering it, more than likely), then use the int.TryParse method:

int value; if (!int.TryParse(textbox1.Text, out value)) {     MessageBox.Show("Please enter a valid number.");     return; } value = value * 2; textbox1.Text = value.ToString();