Windows应用程序C＃字符串组合框

Question

I'm trying to make a Windows application in Visual Studio.

In the public Form1() , I add some items to my ComboBox with SelectComboBox.Items.Insert(0, "Text"); and create a string ex. string NR0 = "__"; with a special song.

When I have selected an item in the ComboBox, and clicked on a select, I want the Windows Media Player to play the specific song in the string (ex. NR0) in the top.

I had tried to create a string in the code for the select button. string ComboNow = "NR" + SelectComboBox.Items.Count.ToString(); and then changed the URL with Player.URL = @ComboNow; .

But then the player think the URL is the name of the string (ex. NR0).

Do you have any idea to solve this problem.

Thank you

---

The code is like below:

namespace Player
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            SelectComboBox.Items.Insert(0, "First song");
            string NR0 = "URL to song";

            SelectComboBox.Items.Insert(1, "Second song");
            string NR1 = "URL to song";
        }

        private void SelectButton_Click(object sender, EventArgs e, string[] value)
        {
            string ComboNow = "NR" + SelectComboBox.Items.Count.ToString();
            Player.URL = @ComboNow;
        }
    }
}

Answer 1

You could use a List or an Array:

private List<string> songs = new List<string>();
//...
SelectComboBox.Items.Insert(0, "First song");
songs.Add("URL to song");
//...
Player.URL = songs[SelectComboBox.SelectedIndex];

Answer 2

Since you are explicitly putting these items into certain locations, I would do something like create a dictionary:

private Dictionary<int, string> Songs
{
    get
    {
        return new Dictionary<int, string>()
            {
                { 0, "url of first song" },
                { 1, "url of second song" }
            };
    }
}

You can then just get the URL like so:

string playerURL = Songs[comboBox1.SelectedIndex];

Note this will only work because you are putting the items into the combo box in a particular order, if this is not what you want in the future, this won't be for you.