public async Task <bool> BindModelAsync(ModelBindingContext bindingContext)
{
ModelBindingHelper.ValidateBindingContext(bindingContext);
if (!ValueProviderResult.CanConvertFromString(bindingContext.ModelType))
{
// this type cannot be converted
return(false);
}
var valueProviderResult = await bindingContext.ValueProvider.GetValueAsync(bindingContext.ModelName);
if (valueProviderResult == null)
{
return(false); // no entry
}
object newModel;
bindingContext.ModelState.SetModelValue(bindingContext.ModelName, valueProviderResult);
try
{
newModel = valueProviderResult.ConvertTo(bindingContext.ModelType);
ModelBindingHelper.ReplaceEmptyStringWithNull(bindingContext.ModelMetadata, ref newModel);
bindingContext.Model = newModel;
}
catch (Exception ex)
{
ModelBindingHelper.AddModelErrorBasedOnExceptionType(bindingContext, ex);
}
return(true);
}
private static bool CanBindType(Type modelType)
{
// Simple types cannot use this binder
var isComplexType = !ValueProviderResult.CanConvertFromString(modelType);
if (!isComplexType)
{
return(false);
}
if (modelType == typeof(ComplexModelDto))
{
// forbidden type - will cause a stack overflow if we try binding this type
return(false);
}
return(true);
}