Lamda Binding (Html.DropDownListFor)

[HttpPost] The Submit Calls Here
public ActionResult SelectForm(
                    WorkFlowTestViewModel model)
{
    int    categorySI = model.categorySI;  
    string Developer  = model.Developer;  
    string Mail       = model.Mail;

    return RedirectToAction("SelectForm", 
                    new RouteValueDictionary(model));
}
[HttpGet]
public ActionResult SelectForm()
{
    var SubmissionModelView = new 
                        WorkFlowTestViewModel();
    
    SubmissionModelView.categories = 
                        db.Categories.ToList();
    SubmissionModelView.Developer  = "Dog";
    SubmissionModelView.Mail       = "Cat";
            
    return View(SubmissionModelView);
}

public class WorkFlowTestViewModel
{
    public IEnumerable < Category > 
                       categories { get; set; }
    public int categorySI   { get; set; }
    public string Developer { get; set; }
    public string Mail      { get; set; }
}

// The POCO for the Form is stored here, see the <aside>
@model montegodata.ModelsView.WorkFlowTestViewModel

// Post the Form to the [ Category ] Controller using the [ SelectForm ] HtmlHelper
@using (Html.BeginForm("SelectForm", "Category", FormMethod.Post))
// POCO Field Column From The Model
@Html.TextBoxFor(m => m.Developer)

// Sample Usage
@Html.DropDownListFor(m => m.categorySI, 
                      new SelectList(Model.categories, "CategoryID", "CategoryName"))

Below is an alternative method using SelectListItem from System.Web.Mvc DropDownListFor has good cohesion with SelectListItem.

		
using System.Web.Mvc;
public List< /*System.Web.Mvc.*/SelectListItem > categories;

SubmissionModelView.categories = new List</*System.Web.Mvc.*/SelectListItem>();
SubmissionModelView.categories.Add(new SelectListItem {Text="Beverages", Value="1"});

@Html.DropDownListFor(m => m.categorySI, Model.categories)

Product Code:	Developer	Mail Id:
		Study The Query String ?categorySI=