Bound error in Webgrid - asp.net-mvc-4

Question

I want to display list of vehicles from db in webgrid .but when i run code there comes error in view.chstml that "datasource must be bound" though i used correct model name and db name .
Model : Vehicles
public List<Vehicles> Listvehicle(string uid)
{
List<Vehicles> svehicle;
using (var session = MvcApplication.Store.OpenSession())
{
svehicle = (from vehc in session.Query<Vehicles>() where vehc.userid == uid select vehc).ToList();
}
return svehicle;
}
Controller
[HttpGet]
public ActionResult Listvehilce(string uid)
{
string userName = "ksundas7#gmail.com";
Register reg = new Register();
string userId = reg.userid(userName);
Vehicles vehcl = new Vehicles();
List<Vehicles> vehclist = vehcl.Listvehicle(userId);
vehclist.ToList();
// List<Vehicles> svehicle = WebGrid.Listvehicle(userId);
return View();
}
View
#model IEnumerable<MvcMembership.Models.Vehicles>
#{
ViewBag.Title = "Listvehicle";
}
<h2>Listvehilce</h2>
#{
var grid = new WebGrid(source: Model, canPage: true, rowsPerPage: 3, selectionFieldName: "selectedRow");
grid.Pager(WebGridPagerModes.NextPrevious);}
<style type="text/css">
.table { margin: 4px; width: 500px; background-color:#FCFCFC;}
.head { background-color: #C1D4E6; font-weight: bold; color: #FFF; }
.webGrid th, .webGrid td { border: 1px solid #C0C0C0; padding: 5px; }
.altRow { background-color: #E4E9F5; color: #000; }
.gridHead a:hover {text-decoration:underline;}
.description { width:auto}
.selectRow{background-color: #389DF5}
</style>
#grid.GetHtml(tableStyle: "grid",
headerStyle: "head",
alternatingRowStyle: "alt",
selectedRowStyle: "select",
columns: grid.Columns(
grid.Column("vehicleid"),// format: (item) => item.GetSelectLink(item.vehicleid)),
grid.Column("Type", " Type"),
grid.Column("Make", "Make"),
grid.Column("Registration", "Registration"),
grid.Column("Colour", "Colour"),
grid.Column("Model", "Model")
))
Error:
A data source must be bound before this operation can be performed.
Anyone can tell me please what is reason of this error.
thanks in advance
Regards

Answer 1

You did not return the list in view.here is updated code.
[HttpGet]
public ActionResult Listvehilce(string uid)
{
string userName = "ksundas7#gmail.com";
Register reg = new Register();
string userId = reg.userid(userName);
Vehicles vehcl = new Vehicles();
List<Vehicles> vehclist = vehcl.Listvehicle(userId);
vehclist.ToList();
// List<Vehicles> svehicle = WebGrid.Listvehicle(userId);
return View(svehicle);
}

Answer 2

Did you check that the model is not null when it is being bound to the webgrid?
Also, you can change this part in the controller:
List<Vehicles> vehclist = vehcl.Listvehicle(userId);
vehclist.ToList();
with this
IEnumerable vehclist = vehcl.Listvehicle(userId);
List already implements the IEnumerable interface.