MVC4 - Partial View Model binding during Submit

Question

I have view model which has another child model to render the partial view (below).

public class ExamResultsFormViewModel
{
    public PreliminaryInformationView         


        

Answer 1

I know its a bit late but it might help to someone

If you have complex model, you can still pass it into partial using:

@Html.Partial("_YourPartialName", Model.Contact, new ViewDataDictionary()
{
    TemplateInfo = new TemplateInfo()
    {
        HtmlFieldPrefix = "Contact"
    }
})

where I have defined model with property "Contact". Now what HtmlFieldPrefix do is add the property binding for each model "so the model binder can find the parent model"

There is a blog post about it: http://www.cpodesign.com/blog/bind-partial-view-model-binding-during-submit/

.NET Core 2 binding

In .NET Core 2 and MVC the answer above will not work, the property is no longer settable.

How ever the solution is very similar.

 @{ Html.ViewData.TemplateInfo.HtmlFieldPrefix = "Contact"; }
 @await Html.PartialAsync("_YourPartialName", Model.Contact)

after you can submit your model, it will bind again.

Hope that helps