Is possibile to scan the [MaxLength] and [Require] attribute from object and build validation rule?
protected void AutoBuildValidationRulesForObject<T>(T obj, string variableName)
{
foreach (var field in typeof(T).GetProperties())
{
var maxLenghtAttr = (MaxLengthAttribute)field.GetCustomAttributes(typeof(MaxLengthAttribute), true).ToList().FirstOrDefault();
var required = (ValidationAttribute)field.GetCustomAttributes(typeof(RequiredAttribute), true).ToList().FirstOrDefault();
if (maxLenghtAttr != null)
{
var variable = Expression.Variable(typeof(T), variableName);
var pe = Expression.Property(variable, typeof(T), field.Name);
var left = Expression.Property(pe, typeof(string).GetProperty("Length"));
var right = Expression.Constant(maxLenghtAttr.Length, typeof(int));
var e2 = Expression.LessThanOrEqual(left, right);
var predicate = Expression.Lambda<Func<bool>>(e2);
if (required != null)
AddValidationRule(() => variable).Condition(predicate).Message(required.ErrorMessage);
else
AddValidationRule(() => variable).Condition(predicate).Message(string.Format("{0} Must be Less then of {1}", field.Name, maxLenghtAttr.Length));
}
Is possibile to scan the [MaxLength] and [Require] attribute from object and build validation rule?