I want to pass the selected value from controller to view

Question

Hi,

 

I am very new to asp.net MVC and have my first project in hand.

 

I am having 2 pages Home and Attendance. 

 

In Home controller, i am getting 3 client names C1, C2, C3 from database in my dropdownlistfor.

 

View 

@model WebApplication1.Models.ClientMdl
    @{
        ViewBag.Title = "Index";
    }

    <h2>ATOM</h2>
@using (Html.BeginForm("Index", "Home",FormMethod.Post,new { id="Frm1"}))
{
    <table>
        <tr></tr>
        <tr>
            <div>
                Select Client name<br />
                @Html.DropDownListFor(model => model.Client_Names, new SelectList(Model.Clients, "Client_Names", "Client_Names"), "Select Client", new { onchange = "document.getElementById('Frm1').submit();" })

                @*                @Html.TextBoxFor(model => model.Client_Names)*@
                @Html.ValidationMessageFor(model => model.Client_Names)
                <input type="submit" value="Submit" />

            </div>
        </tr>
</table>
}

  

I want user to select client name and click on submit. This saves the selected client name in a global variable which will be used across pages.

 

Home Controller

 

namespace WebApplication1.Controllers
{
    public class HomeController : Controller
    {
        MdlCnStringContextClass _mdlCntxtcls = new MdlCnStringContextClass();
        GlobalVaCls GVaCls = new GlobalVaCls();
        GlblAttendanceCls glblAttendanceCls = new GlblAttendanceCls();
        ClientMdl clntMdl = new ClientMdl();

        /*        public ActionResult Index()
                {
                    Client clntMdlObj = new Client();
                    clntMdlObj.Clients = GetAllClientNames();
                    return View(clntMdlObj);
                }



                private List<SelectListItem > GetAllClientNames()
                {
                    List<SelectListItem> CNames = new List<SelectListItem>();
                    CNames = _mdlCntxtcls.clients.Select( c => new SelectListItem { Value=c.ClientID.ToString(),Text=c.Client_Names.ToString()}).ToList();
                    return (CNames);
                }*/

        [HttpGet]
        public ActionResult Index()
        {
            clntMdl.Clients = GetClientNames(clntMdl);
            int InOutRws = glblAttendanceCls.Attendance();
            if (GlobalVaCls.SelectedClient != null)
            {
                ViewBag.VBg = GlobalVaCls.SelectedClient;
                ViewBag.InOtRwsCnt = InOutRws;

                if (InOutRws > 0)
                {
                    var vClientNames = _mdlCntxtcls.Clients
                        .Select(c => c.Client_Names);


                    return View(clntMdl);
                }
                else
                {
                    return View(clntMdl);
                }
            }
            else
            {
                return View(clntMdl);
            }

        }

        [HttpPost ]
        public ActionResult Index(ClientMdl client)
        {
            int InOutRws = glblAttendanceCls.Attendance();
            ViewBag.InOtRwsCnt = InOutRws;
            //Use this statement when getting the value of Dropdown text from View
            string Client_Names = client.Client_Names.ToString();

            //Gets the Client name from textbox in Index View
            //string strClient = client.Client_Names;
            //ViewBag.M = strClient;
            GlobalVaCls.SelectedClient = client.Client_Names;
            clntMdl.Clients = GetClientNames(clntMdl);
            return View(clntMdl);
        }
}

 

When i am on Attendance page and clicking Home link to browse to Home page. I want the client name which was saved in global variable to be the text of the dropdownlist in Home page.

 

But i am facing an error as Object not set to an Instance in this statement

 

@Html.DropDownListFor(model => model.Client_Names, new SelectList(Model.Clients, "Client_Names", "Client_Names"), "Select Client", new { onchange = "document.getElementById('Frm1').submit();" })

 Here is where i need your help. Please revert if you need more clarifications.