passing dropdown's selected value from view to controller in mvc3? - asp.net-mvc

Question

I have mvc3 web application.
In that i have used EF and populate two dropdownlists from database.
Now when i select values from those dropdownlists i need to show them inside webgrid
how can i do this?
#using (Html.BeginForm()) {
#Html.ValidationSummary(true)
<fieldset>
<legend>Mapping</legend>
<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="Mapping" />
</p>
</fieldset>
}
when i clicked on Mapping button it will goes to new page called Mapping.cshtml and have to show webgrid with those two values.

Answer 1

I would create a ViewModel
public class YourClassViewModel
{
public IEnumerable<SelectListItem> Securities{ get; set; }
public int SelectedSecurityId { get; set; }
public IEnumerable<SelectListItem> CUSIPs{ get; set; }
public int SelectedCUSIPId { get; set; }
}
and in my Get Action method, I will return this ViewModel to my strongly typed View
public ActionResult GetThat()
{
YourClassViewModel objVM=new YourClassViewModel();
objVm.Securities=GetAllSecurities() // Get all securities from your data layer
objVm.CUSIPs=GetAllCUSIPs() // Get all CUSIPsfrom your data layer
return View(objVm);
}
And In my View Which is strongly typed,
#model YourClassViewModel
#using (Html.BeginForm())
{
Security :
#Html.DropDownListFor(x => x.SelectedSecurityId ,new SelectList(Model.Securities, "Value", "Text"),"Select one") <br/>
CUSP:
#Html.DropDownListFor(x => x.SelectedCUSIPId ,new SelectList(Model.CUSIPs, "Value", "Text"),"Select one") <br/>
<input type="submit" value="Save" />
}
and now in my HttpPost Action method, I will accept this ViewModel as the parameter and i will have the Selected value there
[HttpPost]
public ActionResult GetThat(YourClassViewModel objVM)
{
// You can access like objVM.SelectedSecurityId
//Save or whatever you do please...
}

Answer 2

Post the form to mapping actionresult. in the actionresult mapping receive dropdown in parameters as mapping(string ID, string ddID). Take these values to view using ViewData.
A better approach will be to make a viewmodel for grid view and make your mapping view strongly typed and use value on grid as you required