private void Form1_Load(object sender, EventArgs e)
{
ArrayList al = new ArrayList(3);
al.AddRange(new string[] { "存款","贷款","外汇"});
comboBox1.DataSource = al;
ArrayList a2 = new ArrayList(2);
Hashtable ht = new Hashtable();
ht.Add("1","翟勋杨");
ht.Add("2","翟勋章");
foreach (DictionaryEntry entry in ht) //键值对通过dictionaryentry把hashtable
//添加到arraylist
a2.Add(entry);
comboBox2.DataSource = a2;
label1.Text = comboBox2.Items.Count.ToString();
comboBox2.ValueMember = "Key";
comboBox2.DisplayMember = "Value";
}