private bool EvaluateIsValid <T> (
string text, NumberStyles numberStyle, TryParseDelegate <T> tryParse, TryParseWithNumberStyleDelegate <T> tryParseWithNumberStyle)
where T : struct, IComparable <T>
{
T parsedValue;
if (_numberStyle != NumberStyles.None)
{
try
{
if (!tryParseWithNumberStyle(text, numberStyle, null, out parsedValue))
{
return(false);
}
}
catch (ArgumentException e)
{
throw new InvalidOperationException("The combination of the flags in the 'NumberStyle' property is invalid.", e);
}
}
else if (!tryParse(text, out parsedValue))
{
return(false);
}
if (!_allowNegative && parsedValue.CompareTo(default(T)) < 0)
{
return(false);
}
return(true);
}
static StringConverter()
{
var tryParseMethods = typeof(T).GetMethods(BindingFlags.Static | BindingFlags.Public)
.Where(x => x.Name == "TryParse" && x.ReturnType == typeof(bool)).ToArray();
tryParseWithNumberStyleMethod = RecognizeTryParseWithNumberStyleMethod(tryParseMethods,
out defaultNumberStyle);
tryParseMethod = RecognizeTryParseWithNoExtraArguments(tryParseMethods);
}
