protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
ModelInstance instance = ModelInstance.GetModelInstance(validationContext.ObjectInstance);
// Get the member name by looking up using the display name, since the member name is mysteriously null for MVC3 projects
var propertyName = validationContext.MemberName ?? validationContext.ObjectType.GetProperties()
.Where(p => p.GetCustomAttributes(false).OfType<DisplayAttribute>()
.Any(a => a.Name == validationContext.DisplayName)).Select(p => p.Name).FirstOrDefault();
ModelProperty sourceProperty = instance.Type.Properties[propertyName];
if (ComparisonPropertyName == null)
return null;
ModelSource comparePropPath = new ModelSource(instance.Type, ComparisonPropertyName);
object compareValue = comparePropPath.GetValue(instance);
int comparison = ((IComparable)compareValue).CompareTo(value);
switch (Operator)
{
case CompareOperator.Equal: return comparison == 0 ? null : new ValidationResult("Invalid value", new string[] { propertyName });
case CompareOperator.NotEqual: return comparison != 0 ? null : new ValidationResult("Invalid value", new string[] { propertyName });
case CompareOperator.GreaterThan: return comparison < 0 ? null : new ValidationResult("Invalid value", new string[] { propertyName });
case CompareOperator.GreaterThanEqual: return comparison <= 0 ? null : new ValidationResult("Invalid value", new string[] { propertyName });
case CompareOperator.LessThan: return comparison > 0 ? null : new ValidationResult("Invalid value", new string[] { propertyName });
case CompareOperator.LessThanEqual: return comparison >= 0 ? null : new ValidationResult("Invalid value", new string[] { propertyName });
}
return null;
}
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
var instance = ModelInstance.GetModelInstance(validationContext.ObjectInstance);
var source = new ModelSource(instance.Type, Source);
// Get the member name by looking up using the display name, since the member name is mysteriously null for MVC3 projects
var propertyName = validationContext.MemberName ?? validationContext.ObjectType.GetProperties()
.Where(p => p.GetCustomAttributes(false).OfType<DisplayAttribute>()
.Any(a => a.Name == validationContext.DisplayName)).Select(p => p.Name).FirstOrDefault();
var property = instance.Type.Properties[propertyName];
// Get the list of allowed values
ModelInstanceList allowedValues = source.GetList(instance);
if (allowedValues == null)
return null;
// List Property
if (property.IsList)
{
// Get the current property value
ModelInstanceList items = instance.GetList((ModelReferenceProperty)property);
// Determine whether the property value is in the list of allowed values
if (!(items == null || items.All(item => allowedValues.Contains(item))))
return new ValidationResult("Invalid value", new string[] { propertyName });
}
// Reference Property
else
{
// Get the current property value
ModelInstance item = instance.GetReference((ModelReferenceProperty)property);
// Determine whether the property value is in the list of allowed values
if (!(item == null || allowedValues.Contains(item)))
return new ValidationResult("Invalid value", new string[] { propertyName });
}
return null;
}
/// <summary>
/// Attempts to create a new <see cref="ModelSource"/> for the specified root type and path.
/// </summary>
/// <param name="rootType">The root type name, which is required for instance paths</param>
/// <param name="path">The source path, which is either an instance path or a static path</param>
/// <returns>True if the source was created, otherwise false</returns>
public static bool TryGetSource(ModelType rootType, string path, out ModelSource source, out ModelProperty sourceProperty)
{
source = new ModelSource();
if (source.InitializeFromTypeAndPath(rootType, path, out sourceProperty))
return true;
else
{
source = null;
return false;
}
}