Access DropDownList and DropDownListFor Value From View To Controller In Asp.Net MVC, C#.Net

In this article I will show you how you can how you can access dropdownlist and dropdownlistfor value from view to controller in mvc, c#.net. I will show separate dropdownlist and dropdownlistfor selected value.

Some of my previous articles are as follow: Dynamically Load Asp.net MVC Layout Page On DropDownList Value Using C#.Net, jQuery DatePicker Calendar With Dropdown Month and Year in Asp.Net, Display DropdownList Item By Group in Asp.Net MVC Using C#.Net, Bind DropDownList Using Entity Framework in ASP.Net MVC Using C#, Bind DropDownList In MVC WebGrid and Retrive Value Using Asp.net MVC, C#.Net, MultiSelect DropdownList Using jQuery in Asp.Net MVC and C#.Net, DropdownList AutoPostback Functionality In MVC Using C#.Net.

So for this article first we will create a new asp.net application and add a model class file. After adding class file we will add the below code into it.

using System; using System.Collections.Generic; using System.Linq; using System.Web; namespace MVC_Demos.Models {     public class StudentModel     {         public List<Student> StudentList { get; set; }         public int SelectedStudentId { get; set; }     }     public class Student     {         public int Id { get; set; }         public string Name { get; set; }     } }

After this we will add a controller class file. In this we will create some list value for showing in dropdown list.

public ActionResult Index()         {             StudentModel _studentmodel = new StudentModel();             _studentmodel.StudentList = new List<Student>();             _studentmodel.StudentList.Add(new Student { Id = 1, Name = "Student1" });             _studentmodel.StudentList.Add(new Student { Id = 2, Name = "Student2" });             _studentmodel.StudentList.Add(new Student { Id = 3, Name = "Student3" });             return View(_studentmodel);         }

Now first we will check for

DropDownListFor:

///         /// Example for DropDownList         ///          ///         [HttpPost]         public ActionResult Index(StudentModel _studentmodel)         {             _studentmodel.StudentList = new List<Student>();             _studentmodel.StudentList.Add(new Student { Id = 1, Name = "Student1" });             _studentmodel.StudentList.Add(new Student { Id = 2, Name = "Student2" });             _studentmodel.StudentList.Add(new Student { Id = 3, Name = "Student3" });             return View(_studentmodel);         }

      

Here in above code I have passed the student model class as parameter. Now generate the view and add the below code.

@model MVC_Demos.Models.StudentModel @{     ViewBag.Title = "Index"; } @using (Html.BeginForm("Index", "DropDownList")) {     <b>Example Of DropDownListFor </b><br />     @Html.DropDownListFor(m=>m.SelectedStudentId, new SelectList(Model.StudentList, "Id", "Name"), "Select Name")<br />     <input type="submit" value="Submit" /> }

In above code I have bind the dropdownlistfor with model. Now run it and check the output.

DropDownList:

For this add the below code.

///         /// Example for DropDownList        ///         ///         [HttpPost]         public ActionResult Index(string SelectedStudentId)         {             StudentModel _studentmodel = new StudentModel();             _studentmodel.StudentList = new List<Student>();             _studentmodel.StudentList.Add(new Student { Id = 1, Name = "Student1" });             _studentmodel.StudentList.Add(new Student { Id = 2, Name = "Student2" });             _studentmodel.StudentList.Add(new Student { Id = 3, Name = "Student3" });             return View(_studentmodel);         }

        

Now we will create view and add the below code.

@model MVC_Demos.Models.StudentModel @{     ViewBag.Title = "Index"; } @using (Html.BeginForm("Index", "DropDownList")) {   <b>Example Of DropDownList </b><br />     @Html.DropDownList("SelectedStudentId", new SelectList(Model.StudentList, "Id", "Name"), "Select Name")<br />     <input type="submit" value="Submit" /> }

Here in above code you can check the name of dropdownlist is same as the parameter passed into the index post method.

Now run it and check the output.