Creating a ListItemCollection Template User Control

Creating a ListItemCollection Template User Control. Here are the 3 files necessary. A link to the reference link is below.

First: The user control code-behind:

[DefaultEvent("SelectedIndexChanged"),
Designer("System.Web.UI.Design.WebControls.ListControlDesigner, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"),
ParseChildren(true, "Items"), ControlValueProperty("SelectedValue"),
DataBindingHandler("System.Web.UI.Design.WebControls.ListControlDataBindingHandler, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
public partial class ComboBoxControl : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    private ListItemCollection m_Items;

  [DefaultValue((string)null), MergableProperty(false), 
  PersistenceMode(PersistenceMode.InnerDefaultProperty), 
  Editor("System.Web.UI.Design.WebControls.ListItemsCollectionEditor,System.Design, Version=2.0.0.0,Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a",
  typeof(UITypeEditor))]     
    public virtual ListItemCollection Items
    {
        get
        {
            if (this.m_Items == null)
            {
                this.m_Items = new ListItemCollection();
            }
            return this.m_Items;
        }
    }
    protected override void CreateChildControls()
    {
        if (this.m_Items == null)
        {
            this.m_Items = new ListItemCollection();
        }
        
        if (m_Items.Count>0) {
            foreach (ListItem item in m_Items)
            {
                _ComboBoxControl.Items.Add(item);
            }
        }
    }
    public override void DataBind()
    {
        CreateChildControls();
        ChildControlsCreated = true;
        _ComboBoxControl.DataBind();
        base.DataBind();
    }
}

Next, the User control

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="ComboBoxControl.ascx.cs" Inherits="ComboBoxControl" %>
<asp:DropDownList ID="_ComboBoxControl" runat="server">
</asp:DropDownList>

And finally the aspx:

        <uc1:ComboBoxControl ID="ComboBoxControl1" runat="server">
        <Items>
            <asp:ListItem Value="Value1" Text="Text1" />
            <asp:ListItem Value="Value2" Text="Text2" />
            <asp:ListItem Value="Value3" Text="Text3" />
            <asp:ListItem Value="Value4" Text="Text4" />
        </Items>
        </uc1:ComboBoxControl>

Credit to: http://developers.de/blogs/damir_dobric/archive/2007/03/30/Implementing-Custom-UserControl-with-ListItem-collection.aspx