private static object convertString(string text, Type pt)
{
if (pt.IsGenericType && pt.GetGenericTypeDefinition() == typeof(Nullable <>))
{
if (String.IsNullOrEmpty(text))
{
return(null);
}
return(convertString(text, pt.GetGenericArguments()[0]));
}
if (String.IsNullOrEmpty(text))
{
if (pt.IsPrimitive || pt.IsEnum || pt == typeof(decimal))
{
text = "0";
}
}
if (pt == typeof(bool))
{
int t;
if (Int32.TryParse(text, out t))
{
return(t != 0);
}
return(Boolean.Parse(text));
}
if (pt == typeof(byte) ||
pt == typeof(sbyte) ||
pt == typeof(short) ||
pt == typeof(ushort) ||
pt == typeof(int) ||
pt == typeof(uint) ||
pt == typeof(long) ||
pt == typeof(ulong) ||
pt == typeof(decimal) ||
pt == typeof(float) ||
pt == typeof(double))
{
object o = ParsingReader.TryParseNumber(text);
if (o == null)
{
throw new InvalidCastException("Cannot cast '" + text + "' to " + pt.FullName);
}
return(Convert.ChangeType(o, pt));
}
if (pt == typeof(char?))
{
if (string.IsNullOrEmpty(text))
{
return(null);
}
return(text[0]);
}
if (pt == typeof(char))
{
return(text[0]);
}
if (pt == typeof(DateTime))
{
return(DateTime.Parse(text));
}
if (pt == typeof(Guid))
{
return(new Guid(text));
}
if (pt == typeof(string))
{
return(text);
}
if (pt.IsEnum)
{
bool hasFlags = CustomAttributeHelper.Has <FlagsAttribute>(pt);
bool hasDigits = !string.IsNullOrEmpty(text) && text.IndexOfAny("0123456789".ToCharArray()) != -1;
bool isempty = string.IsNullOrEmpty(text);
if (isempty || hasFlags || hasDigits)
{
long val = 0;
var names = Enum.GetNames(pt);
var dictionary = new Dictionary <string, long>(StringComparer.OrdinalIgnoreCase);
var values = Enum.GetValues(pt);
for (int i = 0; i < names.Length; ++i)
{
long vv = (long)Convert.ChangeType(values.GetValue(i), typeof(long));
dictionary[names[i]] = vv;
if (isempty && vv == 0)
{
return(Enum.ToObject(pt, vv));
}
}
if (isempty)
{
throw new InvalidCastException(String.Format("Unexpected empty enum value"));
}
int step = 0;
foreach (string str in text.Split(s_enumDelimiters))
{
if (String.IsNullOrEmpty(str))
{
continue;
}
step++;
if (!hasFlags && step > 1)
{
throw new InvalidCastException(String.Format("Unexpected enum value {0}", str));
}
long v;
if (char.IsDigit(str[0]))
{
val |= ParsingReader.ParseNumber <long>(str);
}
else if (dictionary.TryGetValue(str, out v))
{
val |= v;
}
else
{
throw new InvalidCastException(String.Format("Unexpected enum value {0}", str));
}
}
return(Enum.ToObject(pt, val));
}
return(Enum.Parse(pt, text, true));
}
throw new InvalidCastException(String.Format("'{0}' cannot be converted to {1}", text, pt.ToString()));
}
