private ComplexModel CreateAndPopulateComplexModel(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext, IEnumerable<ModelMetadata> propertyMetadatas) {
// create a Complex Model and call into the Complex Model binder
ComplexModel originalComplexModel = new ComplexModel(bindingContext.ModelMetadata, propertyMetadatas);
ModelBindingContext complexModelBindingContext = new ModelBindingContext(bindingContext) {
ModelMetadata = MetadataProvider.GetMetadataForType(() => originalComplexModel, typeof(ComplexModel)),
ModelName = bindingContext.ModelName
};
IModelBinder complexModelBinder = bindingContext.ModelBinderProviders.GetRequiredBinder(modelBindingExecutionContext, complexModelBindingContext);
complexModelBinder.BindModel(modelBindingExecutionContext, complexModelBindingContext);
return (ComplexModel)complexModelBindingContext.Model;
}
private ComplexModel CreateAndPopulateComplexModel(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext, IEnumerable <ModelMetadata> propertyMetadatas)
{
// create a Complex Model and call into the Complex Model binder
ComplexModel originalComplexModel = new ComplexModel(bindingContext.ModelMetadata, propertyMetadatas);
ModelBindingContext complexModelBindingContext = new ModelBindingContext(bindingContext)
{
ModelMetadata = MetadataProvider.GetMetadataForType(() => originalComplexModel, typeof(ComplexModel)),
ModelName = bindingContext.ModelName
};
IModelBinder complexModelBinder = bindingContext.ModelBinderProviders.GetRequiredBinder(modelBindingExecutionContext, complexModelBindingContext);
complexModelBinder.BindModel(modelBindingExecutionContext, complexModelBindingContext);
return((ComplexModel)complexModelBindingContext.Model);
}
public virtual bool BindModel(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext)
{
// Recursive method - prevent stack overflow.
RuntimeHelpers.EnsureSufficientExecutionStack();
ModelBinderUtil.ValidateBindingContext(bindingContext);
EnsureModel(modelBindingExecutionContext, bindingContext);
IEnumerable <ModelMetadata> propertyMetadatas = GetMetadataForProperties(modelBindingExecutionContext, bindingContext);
ComplexModel complexModel = CreateAndPopulateComplexModel(modelBindingExecutionContext, bindingContext, propertyMetadatas);
// post-processing, e.g. property setters and hooking up validation
ProcessComplexModel(modelBindingExecutionContext, bindingContext, complexModel);
bindingContext.ValidationNode.ValidateAllProperties = true; // complex models require full validation
return(true);
}
internal void ProcessComplexModel(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext, ComplexModel complexModel) {
HashSet<string> requiredProperties;
HashSet<string> skipProperties;
GetRequiredPropertiesCollection(bindingContext.ModelType, out requiredProperties, out skipProperties);
// Are all of the required fields accounted for?
HashSet<string> missingRequiredProperties = new HashSet<string>(requiredProperties);
missingRequiredProperties.ExceptWith(complexModel.Results.Select(r => r.Key.PropertyName));
string missingPropertyName = missingRequiredProperties.FirstOrDefault();
if (missingPropertyName != null) {
string fullPropertyKey = ModelBinderUtil.CreatePropertyModelName(bindingContext.ModelName, missingPropertyName);
throw Error.BindingBehavior_ValueNotFound(fullPropertyKey);
}
// for each property that was bound, call the setter, recording exceptions as necessary
foreach (var entry in complexModel.Results) {
ModelMetadata propertyMetadata = entry.Key;
ComplexModelResult complexModelResult = entry.Value;
if (complexModelResult != null) {
SetProperty(modelBindingExecutionContext, bindingContext, propertyMetadata, complexModelResult);
bindingContext.ValidationNode.ChildNodes.Add(complexModelResult.ValidationNode);
}
}
}
internal void ProcessComplexModel(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext, ComplexModel complexModel)
{
HashSet <string> requiredProperties;
HashSet <string> skipProperties;
GetRequiredPropertiesCollection(bindingContext.ModelType, out requiredProperties, out skipProperties);
// Are all of the required fields accounted for?
HashSet <string> missingRequiredProperties = new HashSet <string>(requiredProperties);
missingRequiredProperties.ExceptWith(complexModel.Results.Select(r => r.Key.PropertyName));
string missingPropertyName = missingRequiredProperties.FirstOrDefault();
if (missingPropertyName != null)
{
string fullPropertyKey = ModelBinderUtil.CreatePropertyModelName(bindingContext.ModelName, missingPropertyName);
throw Error.BindingBehavior_ValueNotFound(fullPropertyKey);
}
// for each property that was bound, call the setter, recording exceptions as necessary
foreach (var entry in complexModel.Results)
{
ModelMetadata propertyMetadata = entry.Key;
ComplexModelResult complexModelResult = entry.Value;
if (complexModelResult != null)
{
SetProperty(modelBindingExecutionContext, bindingContext, propertyMetadata, complexModelResult);
bindingContext.ValidationNode.ChildNodes.Add(complexModelResult.ValidationNode);
}
}
}