/// <summary>
/// Finds best constructor
/// </summary>
/// <param name="names">DataReader column names</param>
/// <param name="types">DataReader column types</param>
/// <returns>Matching constructor or default one</returns>
public ConstructorInfo FindConstructor(string[] names, Type[] types)
{
var constructors = _type.GetConstructors(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
foreach (ConstructorInfo ctor in constructors.OrderBy(c => c.IsPublic ? 0 : (c.IsPrivate ? 2 : 1)).ThenBy(c => c.GetParameters().Length))
{
ParameterInfo[] ctorParameters = ctor.GetParameters();
if (ctorParameters.Length == 0)
{
return(ctor);
}
if (ctorParameters.Length != types.Length)
{
continue;
}
int i = 0;
for (; i < ctorParameters.Length; i++)
{
if (!string.Equals(ctorParameters[i].Name, names[i], StringComparison.OrdinalIgnoreCase))
{
break;
}
if (types[i] == typeof(byte[]) && ctorParameters[i].ParameterType.FullName == SqlMapper.LinqBinary)
{
continue;
}
var unboxedType = Nullable.GetUnderlyingType(ctorParameters[i].ParameterType) ?? ctorParameters[i].ParameterType;
if ((unboxedType != types[i] && !SqlMapper.HasTypeHandler(unboxedType)) &&
!(unboxedType.IsEnum() && Enum.GetUnderlyingType(unboxedType) == types[i]) &&
!(unboxedType == typeof(char) && types[i] == typeof(string)) &&
!(unboxedType.IsEnum() && types[i] == typeof(string)))
{
break;
}
}
if (i == ctorParameters.Length)
{
return(ctor);
}
}
return(null);
}
