MVC DropDownListFor

Question

I am new using MVC approach. How to using the DropDownListfor in the MVC? I need get the list from my master table and show the option into the Business Premise in the Business Profile object. This is my ViewModel

 public class SMEAppViewModel 

{        
    public WP2PBusinessProfile BuisinessProfile  { get; set; }        
    public IEnumerable<WP2PMasterDropDownList> MasterList { get; set; }       

}

In my controller, I already initialize the MasterList to the List

 var _MasterList = _context.WP2PMasterDropDownList.ToList();

And in my view, I able to display all the option in the List by using the following code

 @foreach (var karim in Model.MasterList.Where(c => c.Variable == "BusinessPremise"))
                    {

                        @Html.DisplayFor(modelitem => karim.Value) <br>                            

                    }

However, I using the following dropdownlistfor in my view, but my DropDownlistfor is not able to show my drop down option in my view.

 @Html.DropDownListFor(m => m.BuisinessProfile.BusinessPremise, new SelectList(Model.MasterList, "Id", "Value"), "Select value")
                                    @Html.LabelFor(m => m.BuisinessProfile.BusinessPremise, new { @class = "form-control" })

would anyone tell me any wrong in my code?

Thanks

Answer 1

If you just want to display text options in dropdown then try to use list of 'selectlistitem' and then fill out this list with foreach loop like

List<SelectListItem> ls = new List<SelectListItem>();
foreach (var temp in yourlist)
{
   ls.Add(new SelectListItem() 
   { Text = temp.textfield, Value = Convert.ToString(temp.valuefield) });
}

after this add this list to your view field (MasterList for your case but change type to List<SelectListItem>) this will display the dropdown list and to get selected value you can use javascript and jquery with ajax call for further process.

var dropdownvalue = $("#AccountGroupID option:selected").val();
var dropdowntext = $("#AccountGroupID option:selected").text();

this will give you value and text for selected item.

In view to display dropdownlist you can try it like this.

@Html.DropDownListFor(model => model.BuisinessProfile, new SelectList(Model.MasterList, "Value", "Text"), "-- Select --", htmlAttributes: new { @class = "form-control", id = "dropdown"})

Answer 2

Try this in your view

@Html.DropDownListFor(m => m.Entity, new Project.Models.My_Class().My_Method, new { @class = "form-control" })

You cant get data from your DropDownListFor.

In the My_Method , You can use SelectList