string to double

[rebShaul]

Hello.
I want to get a number (double) from the user and store it in a double variable.
I thought the simplest way to get an input is using textBox. The problem is, that the data format of the text at the textBox is String and I want the double value of the data.

Thanks for your help,
Shaul.

 

[Korach]

Well, you can use a text box and extract the left side and the right side of the string, but I think the best way is to use NumericUpDown. You can set the decimal places, increment, max value, min value and other properties. This control return its value as decimal and not as string. It also ensures that the user won't type letters into it.
To get the value:

double d;
d = (double)NumericUpDown1.Value;

 

[umairms]

double d = double.Parse(textBox.Text);

 

[rebShaul]

Amiram,
thanks alot!

 

[seanbo]

you should verify textBox.text first though, else watch your program crash when daft things get entered. this is a way of getting round tha problem, though probably not my neatest code:

char[] sin = textbox1.Text.ToCharArray();
string sout = "0";
foreach(char c in sin)
{
if(((int)c>47 && (int)c<58) || c == '.')
{
sout += c.ToString();
}
else
{
break;
}
}
double myDouble = double.Parse(sout);

 

[rebShaul]

senbo, thank you vey much.
Your solution solves the problem when you're obliged to use textBox. Otherwise, korach's solution might be pretty good.

Any way,
thank you very much again,
Shaul.