MVC5 Razor html.dropdownlistfor set selected when value is in array

Question

I\'m developing an ASP.NET MVC 5 application, with C# and .NET Framework 4.6.1.

I have this View:

@model MyProject.Web.API.Models.Aggreg         


        

Answer 1

I wrote this class to overcome an issue I was having with selecting an option in an html select list. I hope it helps someone.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;

namespace Login_page.Models
{
    public class HTMLSelect
    {
        public string id { get; set; }
        public IEnumerable @class { get; set; }
        public string name { get; set; }
        public Boolean required { get; set; }
        public string size { get; set; }
        public IEnumerable SelectOptions { get; set; }

        public HTMLSelect(IEnumerable options)
        {

        }

        public HTMLSelect(string id, string name)
        {
            this.id = id;
            this.name = name;
        }

        public HTMLSelect(string id, string name, bool required, IEnumerable options)
        {
            this.id = id;
            this.name = name;
            this.required = required;
        }

        private string BuildOpeningTag()
        {
            StringBuilder text = new StringBuilder();
            text.Append("");
            return text.ToString();

        }

        public string GenerateSelect(IEnumerable options)
        {
            StringBuilder selectElement = new StringBuilder();
            selectElement.Append(this.BuildOpeningTag());
            foreach (SelectOption option in options)
            {
                StringBuilder text = new StringBuilder();
                text.Append("\t");
                text.Append("" : ">");
                text.Append(option.Text);
                text.Append("");
                selectElement.Append(text.ToString());
            }
            selectElement.Append("

And

public IEnumerable getOrderTypes()
{
    List orderTypes = new List();
                        if (this.orderType == "OptionText")
                        {
                            orderTypes.Add(new SelectOption() { Value = "1", Text = "OptionText", Selected = true });
                        } else
                        {
                            orderTypes.Add(new SelectOption() { Value = "2", Text = "OptionText2" });
                        }
}

And to use it:

@{
    Login_page.Models.HTMLSelect selectElement = new Login_page.Models.HTMLSelect("order-types", "order-types");

}
@Html.Raw(selectElement.GenerateSelect(Model.getOrderTypes()));