C＃ComboBox无法显示数据源

Question

I try to add a list to a ComboBox as data source when click a button but it doesn't display. Here is what I tried

List<string> data;
    private void button1_Click(object sender, EventArgs e)
    {
        data = new List<string>() { "Beginer", "C# Programer", "Object Oriented" };
        comboBox1.DataSource = data;
    }

[![Screen Capture: when I click button, data source is updated but it doesn't display][1]][1]

But it works when I add a list

List<Food> data;
    private void button1_Click(object sender, EventArgs e)
    {   
        data = new List<Food>()
        {
            new Food() {Name = "Hotdog", Price = 10 },
            new Food() {Name = "Paparati", Price = 12 }
        };

        comboBox1.DataSource = data;
        comboBox1.DisplayMember = "Name";
    }

Answer 1

Try to do this using a BindingSource :

BindingSource bs = new BindingSource();
bs.DataSource = new List<string> { "test1", "test2" };
comboBox1.DataSource = bs;

If this is a webform you have to use Databind

Combobox1.DataBind();

Answer 2

It works for me

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


            List<string> data;
    private void button1_Click(object sender, EventArgs e)
        {
            data = new List<string>() { "Beginer", "C# Programer", "Object      ``Oriented" };
            comboBox1.DataSource = data;
        }
    }

}

Answer 3

You have to bind Combobox for winform such as;

Combobox1.DisplayMember = "Value";
Combobox1.ValueMember = "Key";