public class item
        {
            private object m_Value;
            private string m_Text;

            public item(object value, string text)
            {
                this.m_Value = value;
                this.m_Text = text;
            }
            public object Value
            {
                get { return m_Value; }
            }

            public string Text
            {
                get { return m_Text; }
            }
            public override string ToString()
            {
                return this.m_Text;
            }
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);

            List<item> list = new List<item>();
            for (int i = 0; i < 10; i++)
            { 
                list.Add(new item(i, "item" + i.ToString()));
            }
            this.listBox1.DataSource = list;
        }
        protected override void OnClick(EventArgs e)
        {
            base.OnClick(e);

            item _item = this.listBox1.Items[this.listBox1.SelectedIndex] as item;
            if (_item != null)
            {
                Console.WriteLine(_item.Value);
            }
        }

------解决方案--------------------

C# code
 
 System.Collections.Hashtable   hash   =   new   System.Collections.Hashtable();  
 			for   (int   i   =   0;   i    <   10;   i++)  
 			{  
 				hash.Add(i.ToString(),   "value:"   +   i.ToString());  
 			}  
            
 			//将HASH绑到LISTBOX    
 			System.Collections.IDictionaryEnumerator   myEnumerator   =   hash.GetEnumerator();  
 			DataTable dtTemp=new DataTable(); 
 			dtTemp.Columns.Add("key",typeof(string)); 
 			dtTemp.Columns.Add("value",typeof(string)); 
 			DataRow drTemp=null; 
 			while (myEnumerator.MoveNext())  
 			{                
 				drTemp=dtTemp.NewRow(); 
 				drTemp["key"]=myEnumerator.Key; 
 				drTemp["value"]=myEnumerator.Value; 
 				dtTemp.Rows.Add(drTemp); 
 			} 
 			this.listBox1.DataSource=dtTemp; 
 			listBox1.DisplayMember="key"; 
 			listBox1.ValueMember="value"; 
 


------解决方案--------------------

                Hashtable has = new Hashtable();
               for (int i = 0; i < 10; i++)
               {
                   DataTable dt = new DataTable();
                   dt.Columns.Add("Key");