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);
}
}
}
protected virtual void SetProperty(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext, ModelMetadata propertyMetadata, ComplexModelResult complexModelResult) {
PropertyDescriptor propertyDescriptor = TypeDescriptorHelper.Get(bindingContext.ModelType).GetProperties().Find(propertyMetadata.PropertyName, true /* ignoreCase */);
if (propertyDescriptor == null || propertyDescriptor.IsReadOnly) {
return; // nothing to do
}
object value = complexModelResult.Model ?? GetPropertyDefaultValue(propertyDescriptor);
propertyMetadata.Model = value;
// 'Required' validators need to run first so that we can provide useful error messages if
// the property setters throw, e.g. if we're setting entity keys to null. See comments in
// DefaultModelBinder.SetProperty() for more information.
if (value == null) {
string modelStateKey = complexModelResult.ValidationNode.ModelStateKey;
if (bindingContext.ModelState.IsValidField(modelStateKey)) {
ModelValidator requiredValidator = ModelValidatorProviders.Providers.GetValidators(propertyMetadata, modelBindingExecutionContext).Where(v => v.IsRequired).FirstOrDefault();
if (requiredValidator != null) {
foreach (ModelValidationResult validationResult in requiredValidator.Validate(bindingContext.Model)) {
bindingContext.ModelState.AddModelError(modelStateKey, validationResult.Message);
}
}
}
}
if (value != null || TypeHelpers.TypeAllowsNullValue(propertyDescriptor.PropertyType)) {
try {
propertyDescriptor.SetValue(bindingContext.Model, value);
}
catch (Exception ex) {
// don't display a duplicate error message if a binding error has already occurred for this field
string modelStateKey = complexModelResult.ValidationNode.ModelStateKey;
if (bindingContext.ModelState.IsValidField(modelStateKey)) {
bindingContext.ModelState.AddModelError(modelStateKey, ex);
}
}
}
else {
// trying to set a non-nullable value type to null, need to make sure there's a message
string modelStateKey = complexModelResult.ValidationNode.ModelStateKey;
if (bindingContext.ModelState.IsValidField(modelStateKey)) {
complexModelResult.ValidationNode.Validated += CreateNullCheckFailedHandler(modelBindingExecutionContext, propertyMetadata, value);
}
}
}
protected virtual void SetProperty(ModelBindingExecutionContext modelBindingExecutionContext, ModelBindingContext bindingContext, ModelMetadata propertyMetadata, ComplexModelResult complexModelResult)
{
PropertyDescriptor propertyDescriptor = TypeDescriptorHelper.Get(bindingContext.ModelType).GetProperties().Find(propertyMetadata.PropertyName, true /* ignoreCase */);
if (propertyDescriptor == null || propertyDescriptor.IsReadOnly)
{
return; // nothing to do
}
object value = complexModelResult.Model ?? GetPropertyDefaultValue(propertyDescriptor);
propertyMetadata.Model = value;
// 'Required' validators need to run first so that we can provide useful error messages if
// the property setters throw, e.g. if we're setting entity keys to null. See comments in
// DefaultModelBinder.SetProperty() for more information.
if (value == null)
{
string modelStateKey = complexModelResult.ValidationNode.ModelStateKey;
if (bindingContext.ModelState.IsValidField(modelStateKey))
{
ModelValidator requiredValidator = ModelValidatorProviders.Providers.GetValidators(propertyMetadata, modelBindingExecutionContext).Where(v => v.IsRequired).FirstOrDefault();
if (requiredValidator != null)
{
foreach (ModelValidationResult validationResult in requiredValidator.Validate(bindingContext.Model))
{
bindingContext.ModelState.AddModelError(modelStateKey, validationResult.Message);
}
}
}
}
if (value != null || TypeHelpers.TypeAllowsNullValue(propertyDescriptor.PropertyType))
{
try {
propertyDescriptor.SetValue(bindingContext.Model, value);
}
catch (Exception ex) {
// don't display a duplicate error message if a binding error has already occurred for this field
string modelStateKey = complexModelResult.ValidationNode.ModelStateKey;
if (bindingContext.ModelState.IsValidField(modelStateKey))
{
bindingContext.ModelState.AddModelError(modelStateKey, ex);
}
}
}
else
{
// trying to set a non-nullable value type to null, need to make sure there's a message
string modelStateKey = complexModelResult.ValidationNode.ModelStateKey;
if (bindingContext.ModelState.IsValidField(modelStateKey))
{
complexModelResult.ValidationNode.Validated += CreateNullCheckFailedHandler(modelBindingExecutionContext, propertyMetadata, value);
}
}
}
