// Called when the property setter null check failed, allows us to add our own error message to ModelState.
internal static EventHandler <ModelValidatedEventArgs> CreateNullCheckFailedHandler(
ControllerContext controllerContext,
ModelMetadata modelMetadata,
object incomingValue
)
{
return((sender, e) =>
{
ModelValidationNode validationNode = (ModelValidationNode)sender;
ModelStateDictionary modelState =
e.ControllerContext.Controller.ViewData.ModelState;
if (modelState.IsValidField(validationNode.ModelStateKey))
{
string errorMessage = ModelBinderConfig.ValueRequiredErrorMessageProvider(
controllerContext,
modelMetadata,
incomingValue
);
if (errorMessage != null)
{
modelState.AddModelError(validationNode.ModelStateKey, errorMessage);
}
}
});
}
public bool BindModel(
ControllerContext controllerContext,
ExtensibleModelBindingContext bindingContext
)
{
ModelBinderUtil.ValidateBindingContext(bindingContext);
ValueProviderResult valueProviderResult = bindingContext.ValueProvider.GetValue(
bindingContext.ModelName
);
if (valueProviderResult == null)
{
return(false); // no entry
}
object newModel;
bindingContext.ModelState.SetModelValue(bindingContext.ModelName, valueProviderResult);
try
{
newModel = valueProviderResult.ConvertTo(bindingContext.ModelType);
}
catch (Exception ex)
{
if (IsFormatException(ex))
{
// there was a type conversion failure
string errorString = ModelBinderConfig.TypeConversionErrorMessageProvider(
controllerContext,
bindingContext.ModelMetadata,
valueProviderResult.AttemptedValue
);
if (errorString != null)
{
bindingContext.ModelState.AddModelError(
bindingContext.ModelName,
errorString
);
}
}
else
{
bindingContext.ModelState.AddModelError(bindingContext.ModelName, ex);
}
return(false);
}
ModelBinderUtil.ReplaceEmptyStringWithNull(bindingContext.ModelMetadata, ref newModel);
bindingContext.Model = newModel;
return(true);
}