Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

MVC client-side validation With multiple models

Posted on 2014-02-10
4
Medium Priority
?
152 Views
Last Modified: 2016-06-20
I have three models: VehicleType, VehicleModel, and VehicleManufacturer.

Both VehicleType and VehicleManufacturer point to VehicleModel in the model, like so:

namespace Dealership.Models
{
    public class VehicleModel
    {
        [Key]
        public int ModelId { get; set; }
        public int TypeId { get; set; }
        public int ManufacturerId { get; set; }
        public string ModelName { get; set; }

       
        public VehicleType VehicleType { get; set; }
        public VehicleManufacturer Manufacturer { get; set; }

    }
}

Open in new window


From there, VehicleModel points to the InventoryModel:

public class Inventory
    {
        [Key]
        public int InventoryId { get; set; }
        public int Price { get; set; }
        public int Mileage { get; set; }
        public int Year { get; set; }


        public int ModelId { get; set; }
        public VehicleModel VehicleModel { get; set; }
    }

Open in new window


My problem is when I try to get client-side validation working on all three dropdownlists (VehicleType, VehicleManufacturer, VehicleModel), it only works with VehicleModel. I believe this is because in the View, I am calling the Inventory Model(@model IEnumerable<Dealership.Models.Inventory>), and VehicleModel has a navigation property pointing to the Inventory model. But VehicleManufacturer and VehicleType point to the VehicleModel, so I don't see why all three models can't be validated.
What needs to be done to validate these two dropdownlists using these models?

Here is my controller (fyi)
// GET: /Inventory/Create
        public ActionResult Create()
        {
            ViewBag.TypeId = new SelectList(db.Types, "TypeId", "TypeName"); //(Object List, Value Field (usually Id), Column)
            ViewBag.ModelId = new SelectList(db.Models, "ModelId", "ModelName"); //(Object List, Value Field (usually Id), Column)
            ViewBag.ManufacturerId = new SelectList(db.Manufacturers, "ManufacturerId", "ManufacturerName"); //(Object List, Value Field (usually Id), Column)

            return View();
        }

        // POST: /Inventory/Create
        // To protect from overposting attacks, please enable the specific properties you want to bind to, for 
        // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Create(Inventory inventory, VehicleManufacturer VehicleManufacturer, VehicleType VehicleType)
        {
            if (ModelState.IsValid)
            {
                db.Inventorys.Add(inventory);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            ViewBag.TypeId = new SelectList(db.Types, "TypeId", "TypeName");
            ViewBag.ModelId = new SelectList(db.Models, "ModelId", "ModelName");
            ViewBag.ManufacturerId = new SelectList(db.Manufacturers, "ManufacturerId", "ManufacturerName");

            return View(inventory);
        }

Open in new window



And my View:



<div class="editor-label">
            @Html.LabelFor(model => model.VehicleModel.TypeId, "Some name for column")
        </div>
        <div class="editor-field">
            @Html.DropDownList("TypeId", String.Empty)

            @Html.ValidationMessageFor(model => model.VehicleModel.TypeId)
        </div>


        <div class="editor-label">
            @Html.LabelFor(model => model.ModelId, "Some name for column")
        </div>
        <div class="editor-field">
            @Html.DropDownList("ModelId", String.Empty)
            @Html.ValidationMessageFor(model => model.ModelId)
        </div>



        <div class="editor-label">
            @Html.LabelFor(model => model.VehicleModel.ManufacturerId, "Some name for column")
        </div>
        <div class="editor-field">
            @Html.DropDownList("ManufacturerId", String.Empty)
            @Html.ValidationMessageFor(model => model.VehicleModel.ManufacturerId)
        </div>

Open in new window



Thanks in advance!
0
Comment
Question by:DonHoddinott2
  • 2
4 Comments
 
LVL 11

Expert Comment

by:Mihai Stancescu
ID: 39849352
Hi,

Try decorating the properties with [Required] attribute. You can also implement in your model the interface "IValidatableObject" to provice custom validation.


Regards,
Mishu
0
 

Author Comment

by:DonHoddinott2
ID: 39856777
Hi Mishu,

I appreciate your answer, but I don't it is necessary to use IValidateObject in this instance. I want to understand why it isn't working, just as much as I want it resolved. Adding the [Required] attribute didn't work.
0
 
LVL 11

Accepted Solution

by:
Mihai Stancescu earned 2000 total points
ID: 39858414
Hi again,

As I see it you have two options for achieving this:
1. In your form add or modify this line @Html.ValidationSummary(false) and call the method using false as parameter.
2. In your view change the dropdown definition from @Html.DropDownList("ModelId", String.Empty) to  @Html.DropDownListFor(model=>model.VehicleModel.TypeId,  (SelectList)ViewBag.ModelId,"-please select item-").

The first option will display all the validation messages where that line is placed.
The second option will add the in-line client side validation that you need.

Hope this helps,
Mishu
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Wouldn’t it be nice if you could test whether an element is contained in an array by using a Contains method just like the one available on List objects? Wouldn’t it be good if you could write code like this? (CODE) In .NET 3.5, this is possible…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
Want to learn how to record your desktop screen without having to use an outside camera. Click on this video and learn how to use the cool google extension called "Screencastify"! Step 1: Open a new google tab Step 2: Go to the left hand upper corn…
Loops Section Overview

963 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question