Convert DropDownList SelectList to List<>

Question

1.00/5 (1 vote)

See more:

Error on new SelectList: "Can not convert SelectList to List<>"

C#

listclass tables = new listclass();
public ActionResult Index()
{
    tables.list = new SelectList(new[] {
                    new {ID="1",Name="name1"},
                    new{ID="2",Name="name2"},
                    new{ID="3",Name="name3"},
                },
                "ID", "Name", 1);
    return View(tables);
}

Class1.cs

SQL

namespace DropDownList2.Models
{
    public class Table1
    {
        [Key]
        public int ID { get; set; }
        public string Name { get; set; }
    }
    public class listclass
    {
        public List<Table1> list { get; set; }
    }
}

Index.cshtml

SQL

@model DropDownList2.Models.listclass


@Html.DropDownList("ddl0", new SelectList(Model.list, "ID", "Name"))

Posted 6-Oct-15 3:28am

teledexterus

Updated 6-Oct-15 5:17am

v5

Add a Solution

Comments

Krunal Rohit 6-Oct-15 9:51am

Can you share your listclass code ?

-KR

Richard Deeming 6-Oct-15 10:03am

We cannot see your screen, access your computer, or read your mind.

If you don't post the definition of your listclass class, we can't help you.

2 solutions

Solution 1

tables.list = new SelectList

The "list" property is List<Table> and you are setting it to SelectList. SelectList isn't List<Table> so that won't work. Google for examples of how to use dropdowns and SelectList with MVC.

Posted 6-Oct-15 5:52am

F-ES Sitecore

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard Deeming · Accepted Answer · 2015-10-06T05:54:00

Your property is of type List<Table1>.

You are trying to set it to a value of type SelectList.

Those are two completely different types, and there is no implicit conversion between them.

Change your code to set the property to a value of the correct type:

C#

tables.list = new List<Table1>
{
    new Table1 { ID = "1", Name = "name1" },
    new Table1 { ID = "2", Name = "name2" },
    new Table1 { ID = "3", Name = "name3" },
};

If you don't understand why you can't assign a value of one type to a property of a different type, then you need to read some basic C# tutorials.