how to bind dropdownlist in view dynamically ? mvc4 - html

Question

I want to replace this code in my view
Code :
<label for="name">Lead Source</label><select name="Lead_Source" id="Lead_Source" rel="2">
<option value="1">News Papers </option>
<option value="2">Internet</option>
<option value="3">Social networking</option>
<option value="4">Others</option>
</select>
I want to replace with Dropdownlist so I will bind data dynamically by I am getting undone by work .
I tried like this:
<label for="name">Lead Source</label> #Html.DropDownListFor(c=>c.Lead_Source, Model.Lead_Source_List,"--Select Source--");
The error i am getting after i replace static code is
CS1928: 'System.Web.Mvc.HtmlHelper<Ibs.Iportal.Iwise.Web.Models.LeadSortModel>' does not contain a definition for 'DropDownListFor' and the best extension method overload 'System.Web.Mvc.Html.SelectExtensions.DropDownListFor<TModel,TProperty>(System.Web.Mvc.HtmlHelper<TModel>, System.Linq.Expressions.Expression<System.Func<TModel,TProperty>>, System.Collections.Generic.IEnumerable<System.Web.Mvc.SelectListItem>, object)' has some invalid arguments
EDIT : I am passing a model to view which contain a Lead_Source_List of enumerable list data
Regards

Answer 1

you should create a view model and make strongly typed view,do something like this in you action:
public ActionResult YourAction(int id)
{
var model = new MyViewModel();
using (var db = new SomeDataContext())
{
// Get the boxer you would like to edit from the database
model.Boxer = db.Boxers.Single(x => x.BoxerId == id);
// Here you are selecting all the available weight categroies
// from the database and projecting them to the IEnumerable<SelectListItem>
model.WeightCategories = db.WeightCategories.ToList().Select(x => new SelectListItem
{
Value = x.WeightCategoryId.ToString(),
Text = x.Name
})
}
return View(model);
}
this chunk is populating select list item:
model.WeightCategories = db.WeightCategories.ToList().Select(x => new SelectListItem
{
Value = x.WeightCategoryId.ToString(),
Text = x.Name
})
and assigned to model
Now use in view this way:
#model MyViewModel
#Html.DropDownListFor(
x => model.Boxer.CurrentWeightCategory.WeightCategoryId,
Model.WeightCategories
)