// Used when the ValueProvider contains the collection to be bound as multiple elements, e.g. foo[0], foo[1].
private static List <TElement> BindComplexCollection(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext)
{
string indexPropertyName = ModelBinderUtil.CreatePropertyModelName(bindingContext.ModelName, "index");
ValueProviderResult vpResultIndex = bindingContext.UnvalidatedValueProvider.GetValue(indexPropertyName);
IEnumerable <string> indexNames = CollectionModelBinderUtil.GetIndexNamesFromValueProviderResult(vpResultIndex);
return(BindComplexCollectionFromIndexes(modelBindingExecutionContext, bindingContext, indexNames));
}
public override IModelBinder GetBinder(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext)
{
ModelBinderUtil.ValidateBindingContext(bindingContext);
if (bindingContext.UnvalidatedValueProvider.ContainsPrefix(bindingContext.ModelName))
{
return(CollectionModelBinderUtil.GetGenericBinder(typeof(IDictionary <,>), typeof(Dictionary <,>), typeof(DictionaryModelBinder <,>), bindingContext.ModelMetadata));
}
else
{
return(null);
}
}
internal static List <TElement> BindComplexCollectionFromIndexes(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext, IEnumerable <string> indexNames)
{
bool indexNamesIsFinite;
if (indexNames != null)
{
indexNamesIsFinite = true;
}
else
{
indexNamesIsFinite = false;
indexNames = CollectionModelBinderUtil.GetZeroBasedIndexes();
}
List <TElement> boundCollection = new List <TElement>();
foreach (string indexName in indexNames)
{
string fullChildName = ModelBinderUtil.CreateIndexModelName(bindingContext.ModelName, indexName);
ModelBindingContext childBindingContext = new ModelBindingContext(bindingContext)
{
ModelMetadata = ModelMetadataProviders.Current.GetMetadataForType(null, typeof(TElement)),
ModelName = fullChildName
};
object boundValue = null;
IModelBinder childBinder = bindingContext.ModelBinderProviders.GetBinder(modelBindingExecutionContext, childBindingContext);
if (childBinder != null)
{
if (childBinder.BindModel(modelBindingExecutionContext, childBindingContext))
{
boundValue = childBindingContext.Model;
// merge validation up
bindingContext.ValidationNode.ChildNodes.Add(childBindingContext.ValidationNode);
}
}
else
{
// should we even bother continuing?
if (!indexNamesIsFinite)
{
break;
}
}
boundCollection.Add(ModelBinderUtil.CastOrDefault <TElement>(boundValue));
}
return(boundCollection);
}
protected override bool CreateOrReplaceCollection(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext, IList <KeyValuePair <TKey, TValue> > newCollection)
{
CollectionModelBinderUtil.CreateOrReplaceDictionary(bindingContext, newCollection, () => new Dictionary <TKey, TValue>());
return(true);
}
// Extensibility point that allows the bound collection to be manipulated or transformed before
// being returned from the binder.
protected virtual bool CreateOrReplaceCollection(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext, IList <TElement> newCollection)
{
CollectionModelBinderUtil.CreateOrReplaceCollection(bindingContext, newCollection, () => new List <TElement>());
return(true);
}