物料清单明细中输入查询条件后，查出来的还是全部数据，不能起到过滤作用

swh123321

这是物料清单明细表的“查询”按钮的代码，求教各位指导: public void cbfilter_Click(object sender, EventArgs e)    {
      string xshth = this["hth"].Text , xmmc = this["xmmc"].Text , sgdh = this["sgdh"].Text;
      string cpmc = this["cpmc"].Text,xhgg = this["xhgg"].Text;
      Panel P3 = this["psgdh"] as Panel;
      IViewContainer  Container2 = P3.Tag as IViewContainer;

      Container2.FilterString = "isnull(xshth,'') like'%" +xshth+"%' and isnull(xmmc,'') like '%"+xmmc+"' and sgdh like '%"+sgdh+"%' and " +
        " jh_mps.wlmc like '%"+cpmc+"%' and jh_mps.wlxhgg like '%"+xhgg+"%'" ;
      InnerViewControl ivc1 = this["sgdhlist"] as InnerViewControl;
      ivc1.RefreshData();
}
其中xshth为销售合同号， xmmc为项目名称，sgdh 是施工单号，cpmc 是产品名称，xhgg 是型号规格，求指导！！！