I have a TextBox in which I wanna place a number, the program is supposed to read it, by converting it into a decimal, however, after performing the needed maths with the number, if I delete it from the TextBox, it immediatly produces an error:
Format exception was unhandled ( input string in a incorrect format)
this happens on the line on which I try to convert the text into a decimal
private void readW_TextChanged(object sender, EventArgs e)
{
string _W = readW.Text;
_Wd = Convert.ToDecimal(_W);
}
You get
Format exception was unhandled ( input string in a incorrect format)
because string.Empty cannot be converted to a decimal.
You can use TryParse to inform you if parsing fails:
bool success = decimal.TryParse(_W, out _Wd);
if (success) {
// Use the result
}
else {
// Depending on your needs, do nothing or show an error
}
Note that _W being string.Empty may be a condition you want to ignore, while other parse failures might warrant an error message. If so, your else might look like
else {
if (!string.IsNullOrEmpty(_W)) ShowAnErrorMessageSomehow();
}
Collected from the Internet
Please contact [email protected] to delete if infringement.
Comments