Question

I have a string, “0.000” (or any similar string), that I would like to convert to a long. I am happy to “chop-off” anything after the decimal.

What is the best way to go about this?

I can convert to double and then to long, but I’m just wondering if there is an easier way. All the following statements throw exceptions:

long l3 = Convert.ToInt64(nrToConvert);

long l1;
long.TryParse(nrToConvert, out l1);

long l2 = long.Parse(nrToConvert);

Answer 1

In general when parsing a string value I would firstly parse it to the type it’s representing. So in this case parse it as a double since it is a double. And yes I wrote parse not convert by intention.
There’s so many things that can go wrong when parsing a string so always plan for your parsing to fail! it almost certainly will at some point.

double val;
if(double.TryParse(nrToConvert,out val))
{
  //yous should validate that the value is within the expected range as well
  return (long)val;
}
else
{
  //do some error handling;
}