CODEWITHSUNDEEP
c#asp.net-mvcvalidationmvvmdata-annotations
goldieJ
goldieJ

Reputation: 105

How to validate multiple ViewModels in single view by condition using ModelState.IsValid

I have a problem with validation of one view with multiple ViewModels. My situation is, that I have one Basic form, which is same for lot of pages. By ID parameter, I render new external fields to this Basic form. These external fields are type of ActionResult, using own ViewModel and own Controller. In Main controller on Post action I want to control if ModelState.IsValid, but I have problem - it validate all ViewModels of all external fields, but I want to validate only ViewModel of active external fields (and Basic form too).

It looks like this:

ViewModel of all view models

public class AllFieldsVm
{
    public BasicFormVm BasicFormVm { get; set; }
    public ExternalFieldXyVm ExternalFieldXyVm { get; set; }
    public AnotherExternalFieldVm AnotherExternalFieldVm { get; set; }
}

In controller of external fields I create new instance of AllFieldsVm and in this create new instance of ExternalFieldXyVm (if I need, I prefill these fields). This I render whitout layout like partial view (using @{Html.RenderAction("Action", "Controller", new {@someOptionalData = value});} ), when some condition is true.

In controller of Basic form on Post action I have something like this and I want to use something like this code if (ModelState.IsValid(model.BasicFormVm) && ModelState.IsValid(model.ExternalFieldXyVm)):

[POST("someurl-id{someId}")]
public ActionResult SaveFormData(int someId, AllFieldsVm model)
{
    //Here I want something like 
    //if (ModelState.IsValid(model.BasicFormVm) && ModelState.IsValid(model.ExternalFieldXyVm)) or something like that...

    var se = new SomeEntity();
    se.property1 = model.property1;
    se.property2 = model.property2;

    using (var dbc = _db.Database.BeginTransaction())
    {
        try
        {
            _db.Add(se);
            _db.SaveChanges();

            //My Condition - when save external data
            if (someId == (int) MovementTypes.SomeEnumInt)
            {
                var rd = new ExternalFieldEntity
                    {
                        PropertyA = se.property0,
                        PropertyB = Convert.ToDateTime(model.ExternalFieldXyVm.SomeExternalFieldName)
                    };

                _db.Add(rd);
                _db.SaveChanges();
            }

            dbc.Commit();
        }
        catch (Exception)
        {
            dbc.Rollback();
        }
    }

    return RedirectToAction("Action", "Controller");
}

So, my question is, how can I validate ExternalFieldXyVm separatly based on some conditions?

Is it possible, or I have to create all own validators, without using basic DataAnnotations or FluentValidation? I have no experience with these types of forms, so please be patient...

Thanks to all for help!!

Upvotes: 1

Views: 1077

Answers (1)

goldieJ
goldieJ

Reputation: 105

Great, I got it. I play with this for two days, don't know how it is possible that I didn't see that.

Result is: When view with own view model which is included in main viewmodel, isn't rendered into view, this viewmodel is not validate on post action. So my Basic form is validate everytime, and ExternalFields are validate only when are rendered. So sorry, for so stupid question....

Upvotes: 1

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