ABP dynamic form adds default value to AbpInputTagHelper

[gdlcf88]

The first way:

    public class CreateEditProductViewModel
    {
        [DefaultValue("Default")]
        public string Name { get; set; }
    }

The second way:

    public class CreateEditProductViewModel
    {
        public string Name { get; set; } = "Default";
    }

I thought the Name input box to use the default value on the creation modal page, but not really, neither of the above two ways worked.

[hikalkan]

Can you share your full code class (you may need to create new CreateEditProductViewModel in the Get method)

[gdlcf88]

(you may need to create new CreateEditProductViewModel in the Get method)

I think that's why the problem happened.

I try to create CreateEditProductViewModel manually, it works:

    public class CreateEditProductViewModel
    {
        public string Name { get; set; } = "Default";
    }

    public class CreateModalModel : MyProjectPageModel
    {
        [BindProperty]
        public CreateEditProductViewModel ViewModel { get; set; } = new CreateEditProductViewModel(); // this way works.

        // .ctor

        public virtual Task OnGetAsync()
        {
            ViewModel = new CreateEditProductViewModel();  // or this way.
            
            return  Task.CompletedTask;
        }
    }

There are some questions:

• The document's demo does not create a new model, should it be updated?
• Should the default value works if the model is not assigned a value?
• Should the DefaultValueAttribute also be able to provide the default value?

[yekalkan]

Hi,

It seems like creating a new instance of the model in OnGet method is required. I couldn't find any other way to make it work with Name { get; set; } = "Default"; usage.

Should the default value works if the model is not assigned a value?

No. But it would be nice.

Should the DefaultValueAttribute also be able to provide the default value?

It doesn't provide for default AspNet Core input tag helper.

The document's demo does not create a new model, should it be updated?

It doesn't use any default value, so no need to initialize a new model in OnGetAsync.

[jonny-xhl]

(you may need to create new CreateEditProductViewModel in the Get method)

I think that's why the problem happened.

I try to create CreateEditProductViewModel manually, it works:

    public class CreateEditProductViewModel
    {
        public string Name { get; set; } = "Default";
    }

    public class CreateModalModel : MyProjectPageModel
    {
        [BindProperty]
        public CreateEditProductViewModel ViewModel { get; set; } = new CreateEditProductViewModel(); // this way works.

        // .ctor

        public virtual Task OnGetAsync()
        {
            ViewModel = new CreateEditProductViewModel();  // or this way.
            
            return  Task.CompletedTask;
        }
    }

There are some questions:

• The document's demo does not create a new model, should it be updated?
• Should the default value works if the model is not assigned a value?
• Should the DefaultValueAttribute also be able to provide the default value?

So you need to initialize instances?