Alternative to if, else if

Question

I have a lot of if, else if statements and I know there has to be a better way to do this but even after searching stackoverflow I\'m unsure of how to do so in my particular cas

Answer 1

One more using LINQ and Dictionary

var mapping = new Dictionary()
                        {
                            { "SWGAS.COM", "Southwest Gas" },
                            { "georgiapower.com", "Georgia Power" }
                            .
                            .
                        };

return mapping.Where(pair => txtvar.BillText.IndexOf(pair.Key) > -1)
              .Select(pair => pair.Value)
              .FirstOrDefault();

If we prefer empty string instead of null when no key matches we can use the ?? operator:

return mapping.Where(pair => txtvar.BillText.IndexOf(pair.Key) > -1)
              .Select(pair => pair.Value)
              .FirstOrDefault() ?? "";

If we should consider the dictionary contains similar strings we add an order by, alphabetically, shortest key will be first, this will pick 'SCE' before 'SCEC'

return mapping.Where(pair => txtvar.BillText.IndexOf(pair.Key) > -1)
              .OrderBy(pair => pair.Key)
              .Select(pair => pair.Value)
              .FirstOrDefault() ?? "";