mvc core dropdownlistfor code example

Example 1: mvc 5 dropdownlist

//To populate DropDownList using Viewbag, let's create some collection list with 
//selectListItem types and assign to the Viewbag with appropriate name:

public ActionResult Index() {#  
    region ViewBag  
    List < SelectListItem > mySkills = new List < SelectListItem > () {  
        new SelectListItem {  
            Text = "ASP.NET MVC", Value = "1"  
        },  
        new SelectListItem {  
            Text = "ASP.NET WEB API", Value = "2"  
        },  
        new SelectListItem {  
            Text = "ENTITY FRAMEWORK", Value = "3"  
        },  
        new SelectListItem {  
            Text = "DOCUSIGN", Value = "4"  
        },  
        new SelectListItem {  
            Text = "ORCHARD CMS", Value = "5"  
        },  
        new SelectListItem {  
            Text = "JQUERY", Value = "6"  
        },  
        new SelectListItem {  
            Text = "ZENDESK", Value = "7"  
        },  
        new SelectListItem {  
            Text = "LINQ", Value = "8"  
        },  
        new SelectListItem {  
            Text = "C#", Value = "9"  
        },  
        new SelectListItem {  
            Text = "GOOGLE ANALYTICS", Value = "10"  
        },  
    };  
    ViewBag.MySkills = mySkills;#  
    endregion  
    return View();  
}

//And now bind the ViewBag.MySkills values to DropDownlist as below code in view:

<tr>  
    <td> Populating With ViewBag Data </td>  
    <td> @Html.DropDownList("MySkills", (IEnumerable  
        <SelectListItem>)ViewBag.MySkills) </td>  
</tr>

Example 2: how to use dropdownlist in mvc

BY LOVE
1-	Create a simple method to get the dropdown value

public List<SelectListItem> GetCategories()
        {
            var ResultCategory = objRKMGEntities.Categories.ToList();
            List<SelectListItem> listCategories = new List<SelectListItem>();
            foreach (var items in ResultCategory)
            {
                listCategories.Add(new SelectListItem() { Text = items.Category_Name, Value = items.Category_Id.ToString() });
            }
            return listCategories;
        }

2-	Call the GetCategories() in action method and store the data in viewbag.

public ActionResult SubCategory()
        {
            ViewBag.Categories = GetCategories();
            return View();
        }

3-	Use the viewbag object in the dropdownlist of the view

@Html.DropDownList("CategoryId", ViewBag.Categories as List<SelectListItem>, "Select Category")