[ASP. net mvc] Note (1) model and HTML auxiliary method, asp. netmvc

[ASP. net mvc] Note (1) model and HTML auxiliary method, asp. netmvc

1. ModelState. IsValid check Model Validity

2. display model binding (no parameters in the operation method ):

UpdateModel (album): An exception is thrown when an error occurs during model binding.

TryUpdateModel (album) does not throw an error and returns true and false values.

HTML auxiliary Method

1. The default form method is "get ".

2. @ using (html. BeginForm ()){

@ Htm. ValidationSummary (excludePropertyErrors: truem) // only displays error information about model-related values

}

3. rendering the view in the Controller

ModelState. AddModelError ("Title", "Project name cannot contain numbers ");

The view displays an input value verification error message.

@ Html. ValidationMessage ("Title ");