ComboBoX..Items.Clear();值不在预期的范围内

Question

//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combobox

Answer 1

  private void InitDealers(string CustomerSmplVch)
        {
            //if (cbReceive.Items.Count > 0)
            cbReceive.Items.Clear();
            cbReceive.UpdateLayOut(); //试试有没有这个方法先
            string strWhere = "";

Answer 2

没有cbReceive.UpdateLayOut(); 只有cbReceive.Update(),而且错误在 cbReceive.Items.Clear();还没到cbReceive.UpdateLayOut();这个就已经报错了

Answer 3

我就是想重新绑定Combobox，第一次运行这个函数行，为什么第二次就不行了了？cbReceive.Items有16个值，为什么cbReceive.Items.Clear();报错“值不在预期的范围内。”

Answer 4

不需要cbReceive.Items.Clear()  直接绑定

Answer 5

cbReceive.Items.Clear();  不要 换成 cbReceive.DataSource = null;