Parsing a string

Question

I want to parse a string to long the value is 1.0010412473392E+15.But it gives a exception input string was not in a correct format.how to do this.

Both these answers work how to select both of them as answer.

Answer 1

Check out the System.Globalization.NumberStyles enumeration in the appropriate overload of Int64.Parse. If you specify System.Globalization.NumberStyles.Any, it should work:

long v = Int64.Parse(s, System.Globalization.NumberStyles.Any);

Note, however that the number you are parsing has limited precision, (there are only 13 decimal places but is specified as E+15). Also, the 'Any' enumeration is probably more than you really need - in this case you only need AllowDecimalPoint and AllowExponent:

long v = Int64.Parse(s, System.Globalization.NumberStyles.AllowDecimalPoint | System.Globalization.NumberStyles.AllowExponent);

Answer 2

Are you sure you don't want to parse to double?

var myDouble = double.Parse(myString);

You can then try converting to long.

var myLong = Convert.ToInt64(myDouble);