internal static object GetModelValue(ValueProviderResult result, Type memberType)
{
var memberMapping = ModelMappingManager.MappingFor(memberType);
var descriptor = new ModelDescriptor(memberMapping);
var value = result.ConvertTo(descriptor.KeyProperty.PropertyType);
return memberMapping.Configuration.Repository().Find(value);
}
public Model(Type modelType, ModelDescriptor descriptor, object instance = null)
{
if (modelType == null)
throw new ArgumentNullException("modelType");
if (descriptor == null)
throw new ArgumentNullException("descriptor");
ModelType = modelType;
Descriptor = descriptor;
Instance = instance;
properties.AddRange(descriptor.Properties.Select(p => p.AsModel(this)));
}
public ModelCollection(Type modelType, ModelDescriptor descriptor, IEnumerable items)
{
if (modelType == null)
throw new ArgumentNullException("modelType");
if (descriptor == null)
throw new ArgumentNullException("descriptor");
ModelType = modelType;
Descriptor = descriptor;
if (items != null)
foreach (var item in items)
this.items.Add(new Model(modelType, descriptor, item));
var emptyModel = new Model(modelType, descriptor);
foreach (var property in descriptor.Properties)
properties.Add(property.AsModel(emptyModel));
}
public static ModelCollection ToModelCollection(this Member member)
{
if (member.IsModelCollection)
{
var model = member.UnderliningModel;
var items = (member.Value != null)
? ((IEnumerable)member.Value)
: ((IEnumerable)Activator.CreateInstance(typeof(List<>).MakeGenericType(member.UnderliningModel.ModelType)));
var attr = member.Attributes.OfType<QueryAttribute>().FirstOrDefault();
var result = QueryParser.Parse(model.ModelType, items.AsQueryable(), attr).Execute(true);
var type = result != null ? result.ElementType : model.ModelType;
var descriptor = new ModelDescriptor(ModelMappingManager.MappingFor(type));
return new ModelCollection(type, descriptor, result);
}
return null;
}
public static IEnumerable<SelectListItem> GetSelectListItems(this Member member, IQueryable source, object selectedValue)
{
var items = new List<SelectListItem> {new SelectListItem()};
if (member.IsModel)
{
var mapping = ModelMappingManager.MappingFor(source.ElementType);
var elementDescriptor = new ModelDescriptor(mapping);
foreach (object item in source)
{
var listItem = new SelectListItem();
var value = elementDescriptor.KeyProperty.GetValue(item);
listItem.Value = value != null ? value.ToString() : item.ToString();
if (elementDescriptor.TextProperty != null)
{
var textProperty = elementDescriptor.TextProperty.GetValue(item);
if (textProperty != null)
listItem.Text = textProperty.ToString();
}
else
{
var boxed = item;
listItem.Text = boxed == null ? string.Empty : boxed.ToString();
}
if (selectedValue != null)
{
var descriptor = new ModelDescriptor(ModelMappingManager.MappingFor(member.MemberType));
var modelValue = descriptor.KeyProperty.GetValue(selectedValue);
if (modelValue != null)
listItem.Selected = listItem.Value == modelValue.ToString();
}
items.Add(listItem);
}
}
return items;
}
public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
var modelType = ModelBinders.Binders[typeof(Type)].BindModel(controllerContext, bindingContext) as Type;
var key = controllerContext.RouteData.Values["key"];
var mapping = ModelMappingManager.MappingFor(modelType);
var descriptor = new ModelDescriptor(mapping);
using (var repository = mapping.Configuration.Repository())
{
var keyValues = descriptor.KeyProperty.PropertyType == typeof(Guid)
? Guid.Parse(key.ToString())
: Convert.ChangeType(key, descriptor.KeyProperty.PropertyType);
var instance = repository.Find(keyValues);
var model = new Model(modelType, descriptor, instance);
foreach (var property in model.Properties)
{
if (property.IsModelCollection)
{
property.Value = CreateCollection(bindingContext, property);
}
else
{
var result = bindingContext.ValueProvider.GetValue(property.Name);
if (result != null)
{
property.Value = !property.IsModel
? GetNonModelValue(result, property.MemberType)
: GetModelValue(result, property.MemberType);
}
}
}
return model;
}
}
private static object CreateItem(ModelBindingContext bindingContext, Property property, ValueProviderResult result, int index)
{
var item = GetModelValue(result, property.UnderliningModel.ModelType)
?? Activator.CreateInstance(property.UnderliningModel.ModelType);
var propertyDescriptor = new ModelDescriptor(ModelMappingManager.MappingFor(property.UnderliningModel.ModelType));
var propertyModel = new Model(property.UnderliningModel.ModelType, propertyDescriptor, item);
foreach (var itemProperty in propertyModel.Properties)
{
var itemPropertyName = string.Format("{0}[{1}].{2}", property.Name, index, itemProperty.Name);
var itemResult = bindingContext.ValueProvider.GetValue(itemPropertyName);
if (itemResult != null)
{
itemProperty.Value = !itemProperty.IsModel
? GetNonModelValue(itemResult, itemProperty.MemberType)
: GetModelValue(itemResult, itemProperty.MemberType);
}
}
return item;
}
