datatable绑定comboBox,在下拉菜单中显示对应数据

    实现功能：
         datatable绑定comboBox,在下拉菜单中显示对应数据
    实现方法：
         1、生成datatable，并为combox绑定数据源：
                comboBox1.DataSource = dt1;
                comboBox1.DisplayMember = "用户编码";
                comboBox1.ValueMember = "ID";
                this.comboBox1.SelectedIndex = -1;
        2、在combox的SelectedIndexChanged事件中添加如下方法：
            private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
            {
                int iCurrentIndex = this.comboBox1.SelectedIndex;
                if (iCurrentIndex < 0) return;
                DataRow dr = dt1.Rows[iCurrentIndex];
                iID = Int32.Parse(dr["ID"].ToString());
            }
    另：如果textBox也想绑定该数据源，实现连动（如输入编码显示对应名称）
        3、在textBox的TextChanged事件中添加如下方法：
            private void textBox1_TextChanged(object sender, EventArgs e)
            {
                string strUserNo = this.textBox1.Text.Trim();
                for (int i = 0; i < dt1.Rows.Count; i++)
                {
                    if (dt1.Rows[i]["用户编码"].ToString() == strUserNo)
                    {
                        this.comboBox1.SelectedIndex = i;
                        break;
                    }
                    else
                    {
                        this.comboBox1.SelectedIndex = -1;
                    }
                }
            }