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Sunday, 20 May 2018

Binding DropDownList in MVC


In MVC we have 2 ways to bind the dropdown is strongly type and nomal way.
There are various ways that you can bind the dropdownlist in MVC.

1.       Binding Dropdownlist  using the view bag in MVC
Binding SelectedList to Dropdown

  List<SelectListItem> items = new List<SelectListItem>();
            items.Add(new SelectListItem() { Text = "Male", Value = "Male", Selected = false });
            items.Add(new SelectListItem() { Text = "Female", Value = "Female", Selected = true });

            SelectList selectList = new SelectList(items, "Value", "Text");


            ViewBag.Gender = selectList;

Binding it in HTML, like below
  @Html.DropDownList("Gender", ViewBag.Gender as SelectList)

Will get output as below.




2.       Binding Model to DropdownList  in MVC
Model.Gender should be bind from controller as  SelectList
  @Html.DropDownList("Gender", Model.Gender)


3.       Binding hardcode value to dropdownList in MVC.

     @Html.DropDownList("Gender", new List<SelectListItem>
     { new SelectListItem { Text = "Male", Value = "Male", Selected=true},
       new SelectListItem { Text = "Female", Value = "Female"},
    
       }, "Select Gender")

Output will look alike.


4.       Binding the Values to dropdownlistfor in  MVC.
Controller Code – Function declaration
private void BindDropdown(ref RathoreDetailModel rathoreDetails)
        {
            rathoreDetails.GenderDropDown = GetGenderDetail();
        }

        private IEnumerable<DropdownList> GetGenderDetail()
        {
 // here you can get the result from db and frame it to model

            return new List<DropdownList>        {
                new DropdownList(){Value = "Female", Key="F" },
                new DropdownList(){Value = "Male", Key="M" }
            };
        }
Controller – Function call
BindDropdown(ref lstRathoreDetails);
            return View(lstRathoreDetails);

CSHTML Code Binding
  <div class="form-group">
                        <label for="Occupation">लिंग</label><span class="text-required">*</span>
                        @Html.DropDownListFor(model => model.Gender, new SelectList(Model.GenderDropDown, "Key", "Value", 0),"--Select Gender--", new { @class = "form-control" })
                        @Html.ValidationMessageFor(model => model.Occupation, "", new { @class = "text-error" })
                    </div>


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