how to select dropdownlist value and display in mvc3? - asp.net-mvc

Question

I have an MVC3 web application. On index.cshtml I have two dropdown lists. When I select from those lists I need to click on a next button and I want to display the selected values. How can i do this?
homecontroller.cs
DataRepository objRepository = new DataRepository();
public ActionResult Index()
{
ViewModel objViewModel = new ViewModel();
objViewModel.ID = objRepository.GetPricingSecurityID();
objViewModel.ddlId = objRepository.GetCUSIP();
return View(objViewModel);
}
ViewModel.cs
public class ViewModel
{
//DDL ID
[Required(ErrorMessage = "Please select a PricingSecurityID")]
public List<SelectListItem> ddlId { get; set; }
//DropDownList Values
[Required(ErrorMessage = "Please select a PricingSecurityID")]
public List<SelectListItem> ID { get; set; }
}
index.cshtml
<div class="editor-label">
#Html.Label("Pricing SecurityID")
</div>
<div class="editor-field">
#Html.DropDownListFor(model => model.ID,
new SelectList(Model.ID, "Value", "Text"),
"-- Select category --"
)
#Html.ValidationMessageFor(model => model.ID)
</div>
<div class="editor-label">
#Html.Label("CUSIP ID")
</div>
<div class="editor-field">
#Html.DropDownListFor(model => model.ddlId,
new SelectList(Model.ddlId, "Value", "Text"),
"-- Select category --"
)
#Html.ValidationMessageFor(model => model.ddlId)
</div>
<p>
<input type="submit" value="Next" />
</p>
How can I display selected values?

Answer 1

If your requirement is to build some kind of wizard, you need a way of maintaining state between steps.
ViewBag is no good for this because you should be following the PRG (Post/Redirect/Get) pattern for each wizard step.
TempData would work for navigating forward between steps but will fall over if the user goes back or navigates to a step directly.
You therefore need something with a longer lifetime. The ASP.NET Session object or a database are both good candidates for this.
Here's an example:
public class WizardController : Controller
{
public ActionResult Step1()
{
var session = GetWizardSession();
if (session.Step1 == null)
{
session.Step1 = new Step1View
{
PricingSecurityIds = new SelectList(new[] { 1, 2, 3, 4, 5 }),
SomeOtherIds = new SelectList(new[] { 1, 2, 3, 4, 5 })
};
}
return View(session.Step1);
}
[HttpPost]
public ActionResult Step1(Step1View cmd)
{
var session = GetWizardSession();
// save the wizard state
session.Step1.SelectedPricingSecurityId = cmd.SelectedPricingSecurityId;
session.Step1.SelectedSomeOtherId = cmd.SelectedSomeOtherId;
// now onto step 2
session.Step2 = new Step2View
{
PricingSecurityId = cmd.SelectedPricingSecurityId,
SomeOtherId = cmd.SelectedSomeOtherId,
Name = "John Smith"
};
return RedirectToAction("step2");
}
public ActionResult Step2()
{
return View(GetWizardSession().Step2);
}
public WizardSession GetWizardSession()
{
var session = Session["wizardsession"];
if (session == null)
{
session = new WizardSession();
Session["wizardsession"] = session;
}
return session as WizardSession;
}
}
public class Step1View
{
public SelectList PricingSecurityIds { get; set; }
public SelectList SomeOtherIds { get; set; }
public int SelectedPricingSecurityId { get; set; }
public int SelectedSomeOtherId { get; set; }
}
public class Step2View
{
public int PricingSecurityId { get; set; }
public int SomeOtherId { get; set; }
public string Name { get; set; }
}
public class WizardSession
{
public Step1View Step1 { get; set; }
public Step2View Step2 { get; set; }
}
In Step1 we make a call to GetWizardSession. This returns an object from the ASP.NET Session that contains all of the information we have collected for each step in the wizard. In this example we simply store the ViewModel for each step (i.e. session.Step1).
We check to see if Step1 exists in the session and create it if it doesn't. We then pass the Step1 model to our view.
When the user submits the form we update the "Selected" values in session.Step1. This ensures that if the user navigates back to /step1, we "remember" their values. We then build the model for Step2 and save it in the session.
When we navigate to /step2 we assume that a model exists in the session (because they should have got here from step1) so we just return return View(GetWizardSession().Step2);
The views:
Step 1
#model MvcWizardDemo.Controllers.Step1View
#{
ViewBag.Title = "Step1";
}
<h2>Step1</h2>
<script src="#Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="#Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>
#using (Html.BeginForm()) {
#Html.ValidationSummary(true)
<fieldset>
<legend>Step1View</legend>
<div class="editor-label">
#Html.LabelFor(m => m.PricingSecurityIds)
</div>
<div class="editor-field">
#Html.DropDownListFor(m => m.SelectedPricingSecurityId, Model.PricingSecurityIds)
#Html.ValidationMessageFor(m => m.PricingSecurityIds)
</div>
<div class="editor-label">
#Html.LabelFor(m => m.SomeOtherIds)
</div>
<div class="editor-field">
#Html.DropDownListFor(m => m.SelectedSomeOtherId, Model.SomeOtherIds)
#Html.ValidationMessageFor(m => m.SomeOtherIds)
</div>
<p>
<input type="submit" value="Next" />
</p>
</fieldset>
}
Step 2
#model MvcWizardDemo.Controllers.Step2View
#{
ViewBag.Title = "Step2";
}
<h2>Step2</h2>
Hi, #Model.Name you selected the following values in the previous step:
<p>
<strong>Security Id:</strong> #Model.PricingSecurityId
</p>
<p>
<strong>Some other Id:</strong> #Model.SomeOtherId
</p>

Answer 2

Try this it should work :
[HttpPost]
public ActionResult Index(ViewModel model)
{
// put what you want to show
}