Change a listbox's values

[baloo8]

I have a listbox i want to populate with elements from a database. I have an id and a name that I get from the database.

How can I change the listbox's default indices to the id's i get from the database? So that the listbox displayes the text, and has the id as index.

[kdcorp87]

every item has value propery and text propety in listbox, bind name as text and indexid as value then u can easily access listbox1.item.value or
listbox1.item.text when what need

[alc6379]

Yeah... you can't really change the index, like if the ID is 4, and it's the only one in the listbox, you're going to still access it as myListbox[0].

Just like kdcorp87 said, you can assign a value and a text property. You're probably looking for the Value property.

[baloo8]

Okay.

Neither listbox1.item.value nor listbox1.item.text work. What I have been using is listbox1.Items.Add(string a). I'm using C# WPF. If that makes any difference.

Thanks.

[Geekitygeek]

In this situation, i tend to make a class or struct to hold my listview items. You can either use DisplayMember and ValueMember to control what is shown and returned:

private void Form1_Load(object sender, EventArgs e)
        {
            ListBoxItem newItem = new ListBoxItem();
            newItem.ID = 4;
            newItem.name = "Joe Bloggs";

            listBox1.Items.Add(newItem);
            listBox1.DisplayMember = "name";
            listBox1.ValueMember = "ID";
        }
        
        private class ListBoxItem
        {
            public int ID { get; set; }
            public string name { get; set; }
        }

or if you want to store more info than just Text and ID you can use ToString() to control what is displayed and cast SelectedItem to retrieve the data:

private void Form1_Load(object sender, EventArgs e)
        {
            ListBoxItem newItem = new ListBoxItem();
            newItem.ID = 4;
            newItem.name = "Joe Bloggs";
            newItem.department = "Admin";

            listBox1.Items.Add(newItem);
        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            ListBoxItem selectedItem = listBox1.SelectedItem as ListBoxItem;

            MessageBox.Show(string.Format("{0}: Staff member {1} works in {2}", selectedItem.ID, selectedItem.name, selectedItem.department));
        }
        
        private class ListBoxItem
        {
            public int ID { get; set; }
            public string name { get; set; }
            public string department { get; set; }

            public override string ToString()
            {
                return "User: " + name;
            }

        }

[Geekitygeek]

Just a note: the above code can be used with either a Class or a Struct, which you use depends on curcumstances and design requirements. The short difference between class and struct is that structs are a value type whilst calsses are reference. The debate about which to use when runs way too deep to cover here, but its worth reading into.