public Task BindModelAsync(ModelBindingContext bindingContext)
{
if (bindingContext == null)
{
throw new ArgumentNullException(nameof(bindingContext));
}
var modelName = bindingContext.ModelName;
var valueProviderResult = bindingContext.ValueProvider.GetValue(modelName);
if (valueProviderResult == ValueProviderResult.None)
{
return(Task.CompletedTask);
}
var value = valueProviderResult.FirstValue;
// not good for prod, but good enough for a demo 🙂
if (bindingContext.ModelType == typeof(CartId) && CartId.TryParse(value, out var cartId))
{
bindingContext.Result = ModelBindingResult.Success(cartId);
}
else if (bindingContext.ModelType == typeof(ItemId) && ItemId.TryParse(value, out var itemId))
{
bindingContext.Result = ModelBindingResult.Success(itemId);
}
else
{
bindingContext.Result = ModelBindingResult.Failed();
}
return(Task.CompletedTask);
}
