I am student I am new to MVC and I google it and I tried see I write all code but viewbag not properly working

I am transferring data and using the viewing but not transferring the dropdown value

type.cs

    public class Type
    {
        //public int Value { get; set; }
        //public string Text { get; set; }

        public int typeid { get; set; }
        public string typename { get; set; }
    }

    public class TypeViewModel
    {
        //public List<Type> TypeDetaills { get; set; }

        public SelectList TypeList { get; set; }

    }

HomeControlle.cs

        TypeViewModel TypeViewModel = new TypeViewModel();

        public ActionResult Index()
        {
            SqlCommand cmd = new SqlCommand("getType", cn);
            cmd.CommandType = CommandType.StoredProcedure;
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            cn.Open();
            da.Fill(ds);
            DataTable dt = ds.Tables[0];
        
            List<Type> objcountry = new List<Type>();
            SelectList objlistofcountrytobind = new SelectList(dt.AsDataView(), "typeid", "typename", 0);
            TypeViewModel.TypeList = objlistofcountrytobind;

            ViewBag.typename = TypeViewModel.TypeList;
            cn.Close();

            return View();
        }

        [HttpPost]
        public ActionResult CreateCustomer(Customer customer,string TypeList)
        {
            customer.Type = TypeList;
            customer.CustomerName = cust;
       
            return RedirectToAction("Index");
        }

Index.cshtml

@model projectname.Models.TypeViewModel
@{
    ViewBag.Title = "Index";
    //var t = ViewBag.typename;
}

<h2>Type Query</h2>

@using (Html.BeginForm("CreateCustomer", "Home", FormMethod.Post, new { TypeList = @ViewBag.typename }))
{
    <div >

        <div >
            <label>Type Name:</label>

            @Html.DropDownListFor(model => model.TypeList, ViewBag.typename as SelectList)

            @*@Html.Hidden("TypeList", @ViewBag.typename);*@

            @*@Html.HiddenFor("TypeList", @ViewBag.typename);*@
            @*@Html.HiddenFor(x => x.TypeList)*@

            @*<input type="hidden" value="@ViewBag.typename" />*@

            @*@Html.DropDownList("typeid", t as SelectList)*@
            @*@Html.DropDownListFor(x => x.typename, new SelectList((IEnumerable<Type>)t, "typeid", "typename"))*@
        </div>
    </div>
    <div >
        <div >
            <label>Customer Name:</label>
            <input type="text" id="cust" name="cust" />
        </div>
    </div>
    <input type="submit" />
}

see i select the runtime warranty from the drop down

I am trying to pass controller warrenty not 2

see store procedure getType fill this sp in dropdown

I tried hiddenfor attribute but it not work

I want the pass warrenty to createcustomer controller not 2

please help

CodePudding user response：

Before trying to create code, you have to learn that the first letter in MVC is for model. So you have forget that viewbag is even exist. Create a view model , assign data and pass it from the action and use it inside of the view

  TypeViewModel.TypeList = objlistofcountrytobind;
  return View (TypeViewModel)

and you can only assign as a hidden (or not hidden) the primitive types (as string or int) not the whole instanse of the class

CodePudding user response：

You can modify your view model as described in the following post: How to get DropDownList SelectedValue in Controller in MVC.

Or you can use the JavaScript:

@Html.DropDownListFor(model => model.TypeList,
    ViewBag.type_name as SelectList,
    new { onchange=" { var ddltext = $(`#TypeList option:selected`).text();$('#textvalue').val(ddltext);}" }) 

@Html.Hidden("typeList", "")

<script src="~/Scripts/jquery-3.3.1.min.js"></script>