ComboBoX..Items.Clear();值不在预期的范围内
//初始化收货客户集合
        private void InitDealers(string CustomerSmplVch)
        {
            if (cbReceive.Items.Count > 0)
            cbReceive.Items.Clear();
            string strWhere = "";
            if (!string.IsNullOrEmpty(CustomerSmplVch))
            {
                strWhere+="  CustomerSmplVch='"+CustomerSmplVch+"' ";  
            }
            DataTable dt = dearBLL.GetList(strWhere);
            DataRow dr = dt.NewRow();
            dr["CustomerSmplVch"] = "0";
            dr["DealerCodeVch"] = "0";
            dr["DealerNameVch"] = "--请选择--";
            dt.Rows.InsertAt(dr,0);
            cbReceive.DataSource = dt.DefaultView;
            cbReceive.ValueMember = "DealerCodeVch";
            cbReceive.DisplayMember = "DealerNameVch";
        }
给combobox赋值调用此方法后，想重新给Combobox赋值，再次调用此方法，可cbReceive.Items.Clear();报错“值不在预期的范围内。”为什么啊？请大家帮帮忙，谢谢了，在线等
------解决方案--------------------
错误在哪一行出现
------解决方案--------------------

  private void InitDealers(string CustomerSmplVch)