Question

I have a field in DB which is float. My application is WindowsForm. I need to convert the value in textbox of the format 43.27 to double.
When I do this COnvert.ToDouble(txtbox.Text) I get exception saying input string is wrong format.
How to rectify this issue

Answer 1

Try specifying a culture when parsing:

// CultureInfo.InvariantCulture would use "." as decimal separator
// which might not be the case of the current culture
// you are using in your application. So this will parse
// values using "." as separator.
double d = double.Parse(txtbox.Text, CultureInfo.InvariantCulture);

And to handle the error case for gracefully instead of throwing exceptions around you could use the TryParse method:

double d;
if (double.TryParse(txtbox.Text, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out d))
{
    // TODO: use the parsed value
}
else
{
    // TODO: tell the user to enter a correct number
}