public ICustomTypeDescriptor GetTypeDescriptor(IModelBindingContext bindingContext, Func<ICustomTypeDescriptor> fallback)
{
if (bindingContext.Model != null)
{
var concreteType = bindingContext.Model.GetType();
if (Nullable.GetUnderlyingType(concreteType) == null)
{
return new AssociatedMetadataTypeTypeDescriptionProvider(concreteType).GetTypeDescriptor(concreteType);
}
}
return fallback();
}
public object BindModel(IModelBindingContext bindingContext, Func<Type, IModelBindingContext, object> bindToType, Func<object> defaultBind, Func<string, Type> readTypeFromString)
{
var typeSlug = bindingContext.ValueProvider.GetValue(bindingContext.ModelName + ".__type");
if (typeSlug != null)
{
var value = typeSlug.AttemptedValue as string;
if (!string.IsNullOrWhiteSpace(value))
{
var type = readTypeFromString(value);
return bindToType(type, bindingContext);
}
}
return defaultBind();
}
public object BindModel(IModelBindingContext bindingContext, Func <Type, IModelBindingContext, object> bindToType, Func <object> defaultBind, Func <string, Type> readTypeFromString)
{
var typeSlug = bindingContext.ValueProvider.GetValue(bindingContext.ModelName + ".__type");
if (typeSlug != null)
{
var value = typeSlug.AttemptedValue as string;
if (!string.IsNullOrWhiteSpace(value))
{
var type = readTypeFromString(value);
return(bindToType(type, bindingContext));
}
}
return(defaultBind());
}
public object CreateModel(IModelBindingContext bindingContext, Type modelType, Func<object> fallback, Func<string, Type> readTypeFromString)
{
var typeSlug = bindingContext.ValueProvider.GetValue(bindingContext.ModelName + ".__type");
if (typeSlug != null)
{
var value = typeSlug.AttemptedValue as string;
if (!string.IsNullOrWhiteSpace(value))
{
var type = readTypeFromString(value);
if (type != null && modelType.IsAssignableFrom(type))
{
var instance = fallback();
bindingContext.SetModelMetadataForType(() => instance, type);
return instance;
}
}
}
return fallback();
}
public object CreateModel(IModelBindingContext bindingContext, Type modelType, Func <object> fallback, Func <string, Type> readTypeFromString)
{
var typeSlug = bindingContext.ValueProvider.GetValue(bindingContext.ModelName + ".__type");
if (typeSlug != null)
{
var value = typeSlug.AttemptedValue as string;
if (!string.IsNullOrWhiteSpace(value))
{
var type = readTypeFromString(value);
if (type != null && modelType.IsAssignableFrom(type))
{
var instance = fallback();
bindingContext.SetModelMetadataForType(() => instance, type);
return(instance);
}
}
}
return(fallback());
}
