protected virtual void BindProperty(ControllerContext controllerContext, ModelBindingContext bindingContext, PropertyDescriptor propertyDescriptor)
{
// need to skip properties that aren't part of the request, else we might hit a StackOverflowException
string fullPropertyKey = CreateSubPropertyName(bindingContext.ModelName, propertyDescriptor.Name);
if (!DictionaryHelpers.DoesAnyKeyHavePrefix(bindingContext.ValueProvider, fullPropertyKey))
{
return;
}
// call into the property's model binder
IModelBinder propertyBinder = Binders.GetBinder(propertyDescriptor.PropertyType);
object originalPropertyValue = propertyDescriptor.GetValue(bindingContext.Model);
ModelBindingContext innerBindingContext = new ModelBindingContext()
{
Model = originalPropertyValue,
ModelName = fullPropertyKey,
ModelState = bindingContext.ModelState,
ModelType = propertyDescriptor.PropertyType,
ValueProvider = bindingContext.ValueProvider
};
object newPropertyValue = propertyBinder.BindModel(controllerContext, innerBindingContext);
// validation
if (OnPropertyValidating(controllerContext, bindingContext, propertyDescriptor, newPropertyValue))
{
SetProperty(controllerContext, bindingContext, propertyDescriptor, newPropertyValue);
OnPropertyValidated(controllerContext, bindingContext, propertyDescriptor, newPropertyValue);
}
}
public bool IsValidField(string key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
// if the key is not found in the dictionary, we just say that it's valid (since there are no errors)
return(DictionaryHelpers.FindKeysWithPrefix(this, key).All(entry => entry.Value.Errors.Count == 0));
}
public virtual object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
if (bindingContext == null)
{
throw new ArgumentNullException("bindingContext");
}
bool performedFallback = false;
if (!String.IsNullOrEmpty(bindingContext.ModelName) && !DictionaryHelpers.DoesAnyKeyHavePrefix(bindingContext.ValueProvider, bindingContext.ModelName))
{
// We couldn't find any entry that began with the prefix. If this is the top-level element, fall back
// to the empty prefix.
if (bindingContext.FallbackToEmptyPrefix)
{
bindingContext = new ModelBindingContext()
{
Model = bindingContext.Model,
ModelState = bindingContext.ModelState,
ModelType = bindingContext.ModelType,
PropertyFilter = bindingContext.PropertyFilter,
ValueProvider = bindingContext.ValueProvider
};
performedFallback = true;
}
else
{
return(null);
}
}
// Simple model = int, string, etc.; determined by calling TypeConverter.CanConvertFrom(typeof(string))
// or by seeing if a value in the request exactly matches the name of the model we're binding.
// Complex type = everything else.
if (!performedFallback)
{
ValueProviderResult vpResult;
bindingContext.ValueProvider.TryGetValue(bindingContext.ModelName, out vpResult);
if (vpResult != null)
{
return(BindSimpleModel(controllerContext, bindingContext, vpResult));
}
}
if (TypeDescriptor.GetConverter(bindingContext.ModelType).CanConvertFrom(typeof(string)))
{
return(null);
}
return(BindComplexModel(controllerContext, bindingContext));
}
internal object UpdateCollection(ControllerContext controllerContext, ModelBindingContext bindingContext, Type elementType)
{
IModelBinder elementBinder = Binders.GetBinder(elementType);
// build up a list of items from the request
List <object> modelList = new List <object>();
for (int currentIndex = 0; ; currentIndex++)
{
string subIndexKey = CreateSubIndexName(bindingContext.ModelName, currentIndex);
if (!DictionaryHelpers.DoesAnyKeyHavePrefix(bindingContext.ValueProvider, subIndexKey))
{
// we ran out of elements to pull
break;
}
ModelBindingContext innerContext = new ModelBindingContext()
{
ModelName = subIndexKey,
ModelState = bindingContext.ModelState,
ModelType = elementType,
PropertyFilter = bindingContext.PropertyFilter,
ValueProvider = bindingContext.ValueProvider
};
object thisElement = elementBinder.BindModel(controllerContext, innerContext);
// we need to merge model errors up
VerifyValueUsability(controllerContext, bindingContext.ModelState, subIndexKey, elementType, thisElement);
modelList.Add(thisElement);
}
// if there weren't any elements at all in the request, just return
if (modelList.Count == 0)
{
return(null);
}
// replace the original collection
object collection = bindingContext.Model;
CollectionHelpers.ReplaceCollection(elementType, collection, modelList);
return(collection);
}
internal object UpdateDictionary(ControllerContext controllerContext, ModelBindingContext bindingContext, Type keyType, Type valueType)
{
IModelBinder keyBinder = Binders.GetBinder(keyType);
IModelBinder valueBinder = Binders.GetBinder(valueType);
// build up a list of items from the request
List <KeyValuePair <object, object> > modelList = new List <KeyValuePair <object, object> >();
for (int currentIndex = 0; ; currentIndex++)
{
string subIndexKey = CreateSubIndexName(bindingContext.ModelName, currentIndex);
string keyFieldKey = CreateSubPropertyName(subIndexKey, "key");
string valueFieldKey = CreateSubPropertyName(subIndexKey, "value");
if (!(DictionaryHelpers.DoesAnyKeyHavePrefix(bindingContext.ValueProvider, keyFieldKey) && DictionaryHelpers.DoesAnyKeyHavePrefix(bindingContext.ValueProvider, valueFieldKey)))
{
// we ran out of elements to pull
break;
}
// bind the key
ModelBindingContext keyBindingContext = new ModelBindingContext()
{
ModelName = keyFieldKey,
ModelState = bindingContext.ModelState,
ModelType = keyType,
ValueProvider = bindingContext.ValueProvider
};
object thisKey = keyBinder.BindModel(controllerContext, keyBindingContext);
// we need to merge model errors up
VerifyValueUsability(controllerContext, bindingContext.ModelState, keyFieldKey, keyType, thisKey);
if (!keyType.IsInstanceOfType(thisKey))
{
// we can't add an invalid key, so just move on
continue;
}
// bind the value
ModelBindingContext valueBindingContext = new ModelBindingContext()
{
ModelName = valueFieldKey,
ModelState = bindingContext.ModelState,
ModelType = valueType,
PropertyFilter = bindingContext.PropertyFilter,
ValueProvider = bindingContext.ValueProvider
};
object thisValue = valueBinder.BindModel(controllerContext, valueBindingContext);
// we need to merge model errors up
VerifyValueUsability(controllerContext, bindingContext.ModelState, valueFieldKey, valueType, thisValue);
KeyValuePair <object, object> kvp = new KeyValuePair <object, object>(thisKey, thisValue);
modelList.Add(kvp);
}
// if there weren't any elements at all in the request, just return
if (modelList.Count == 0)
{
return(null);
}
// replace the original collection
object dictionary = bindingContext.Model;
CollectionHelpers.ReplaceDictionary(keyType, valueType, dictionary, modelList);
return(dictionary);
}
