CODEWITHSUNDEEP
asp.netasp.net-mvcasp.net-mvc-4
nischalinn
nischalinn

Reputation: 1175

concatenate two fields in drop down list

I have a model class

namespace myapp.Models
{
    public class SubjectModels 
    {
        [Key]
        public int SubjectId { get; set; }
        [Required]
        public int SubjectType { get; set; }
        [Required]
        [MinLength(5)]
        public string SubjectName { get; set; }
    }
}

Here, SubjectType = 1 for Optional and SubjectType = 2 for Compulsory

Now in another class I have to create a drop down for this class,

namespace myapp.Models
{
    public class SelectionModels 
    {
        [Key]
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public int SelectionId { get; set; }
        [Required]
        [MinLength(5)]
        public string SelectionDate { get; set; }
        
        [ForeignKey("SubjectId")]
        public SubjectModels Subject { get; set; } 

        public int SubjectId { get; set; }
    }
}

When I genereted controller and create.cshtml via scaffolding, my create controller method:

public ActionResult Create()
{
    ViewBag.SubjectId = new SelectList(db.Subjects, "SubjectId", "SubjectName");            
    return View();
}

But I have to create a drop down concatenating the fields "SubjectName" and "SubjectType". Also, display for SubjectType should be Optional and Compulsory not integer.

for example,

"Optional - ResearchMethodology"
"Compulsory - BioChemistry"

How shall I do this? I googled but could not found suitable solutions. Please help!!!

Upvotes: 1

Views: 411

Answers (1)

VDWWD
VDWWD

Reputation: 35544

I would create an extra property in the SubjectModels class.

class SubjectModels
{
    public int SubjectId { get; set; }
    public int SubjectType { get; set; }
    public string SubjectName { get; set; }

    public string SubjectNameAndType
    {
        get
        {
            return string.Format("{0} - {1}", SubjectName, SubjectType);
        }
    }
}

Then in the Controller you can use that property to fill the SelectList

var list = new List<SubjectModels>()
{
    new SubjectModels()
    {
        SubjectType = 1,
        SubjectName = "Name 1"
    },
    new SubjectModels()
    {
        SubjectType = 2,
        SubjectName = "Name 2"
    }
};

ViewBag.SubjectId = new SelectList(list, "SubjectId", "SubjectNameAndType");

Now you will see the correct values in the DropDownList.

@Html.DropDownListFor(m => m.MyValue, (SelectList)ViewBag.SubjectId, "Select...")

Upvotes: 1

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