private void databind(string bt, string et)
    {
        DataTable dt;

        dt             = LineOutputReport.QueryData(bt, et, ddlWOType.SelectedValue, ddlWOProducttype.SelectedValue, ddlWidth.SelectedValue, ddlThinkness.SelectedValue, ddlWorksite.SelectedItem.Value, ddlClass.SelectedValue);
        grd.DataSource = dt;
        grd.DataBind();
    }
 protected void Page_Load(object sender, EventArgs e)
 {
     if (!IsPostBack)
     {
         //绑定查询选项内容
         LineOutputReport.setWorksiteDDL(ddlWorksite);
         //工单类型
         OutputReport.setWOTypeddl(ddlWOType);
         //工单厚度
         OutputReport.setWOddl(ddlThinkness, "mouldthinkness");
         //工单宽度
         OutputReport.setWOddl(ddlWidth, "mouldwidth");
         //工单产品类型
         OutputReport.setWOddl(ddlWOProducttype, "mouldtype");
         //班次
         OutputReport.setClassDDL(ddlClass);
         BindTimeByClass();
     }
 }