Question

On the client, I have an array of ints on which I call a ToString method; I’m then sending that string to the server via ajax.

On the server, I’m writing this:

var TestList = (from string s in TheString.Split(',')
                select Convert.ToInt64(s)).ToList<long>();

Is this going to crash if the incoming string actually contains unexpected values?

Thanks.

Answer 1

If the string contains unexpected values it could throw a FormatException or an OverflowException as mentioned in the documentation for Convert.ToInt64(string).

To avoid the exception you could use bool long.TryParse(string, out long).

List<long> testList = new List<long>();
foreach (string s in theString.Split(','))
{
    long number;
    if (long.TryParse(s, out number))
    {
        testList.Add(number);
    }
    else
    {
        // Do something?
    }
}