MvcApplication1.Models.Database1Context db = new MvcApplication1.Models.Database1Context(); var data = db.locations.ToList().Select(t => new GroupedSelectListItem { GroupKey = t.location_group_id.ToString(), GroupName = t.location_group.name, Text = t.name, Value = t.id.ToString() });
Razor View:
@Html.DropDownGroupListFor(m => m.location_id, data, "-- Select --", new { @data_val = "true", // for Required Validation @data_val_required = "The Name field is required." // for Required Validation })
Fill static data:
IEnumerable<GroupedSelectListItem> item; item = new List<GroupedSelectListItem> { new GroupedSelectListItem() { Value="volvo", Text="Volvo", GroupName="Swedish Cars", GroupKey="1", Disabled=true }, new GroupedSelectListItem() { Value="saab", Text="Saab",GroupName="Swedish Cars", GroupKey="1" }, new GroupedSelectListItem() { Value="mercedes", Text="Mercedes", GroupName="German Cars", GroupKey="2" }, new GroupedSelectListItem() { Value="audi", Text="Audi", GroupName="German Cars", GroupKey="2",Selected=true }}; Razor View: @using (Ajax.BeginForm("Index", null, new AjaxOptions { HttpMethod = "post" }, new { id = "frm" })) { @Html.DropDownGroupList("Cars", item, "-- Select Car --", new Dictionary<string, object>() { { "data-val", "true" }, { "data-val-required", "The Car field is required." } }) <input type="submit" name="name" value="Send" /> }
Output:
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@Html.DropDownGroupListFor(m => m.location_id, data, "-- Select --", new {@data_val = "true", // for Required Validation
@data_val_required = "The Name field is required." // for Required Validation
})