SQL查询操作

有7个筛选条件任意一个条件都可以筛选。采用LINQ查询比较繁琐，且操作步骤增加，选择用SQL判断。

 public DataTable GetData(string cboCld, string cboFact,string cboPrtN,string  txtbCde,string txtbDce,string txtbPdt,string txtbRID)
        {
            string strSql = @"select distinct l.Area,l.Facility ,m.vdpartno,l.PartNo,l.ReelID,l.Qty ,l.Location,l.datecd,l.prodcd,l.vendorcd,l.lmdate from VMIReelShelfDetail l
left JOIN smtitem  m
ON m.partno  = l.partno
where l.ReelID <>‘‘";
            if (cboCld != "ALL")
            {
                strSql = strSql + " AND  l.Area=‘" + cboCld + "‘";
            }
            if (cboFact != "ALL")
            {
                strSql = strSql + " AND  l.Facility=‘" + cboFact + "‘";
            }
            if (cboPrtN != "ALL")
            {
                strSql = strSql + " AND  l.PartNo=‘" + cboPrtN + "‘";
            }
            if (txtbCde != "")
            {
                strSql = strSql + " AND  l.vendorcd=‘" + txtbCde + "‘";
            }
            if (txtbDce != "")
            {
                strSql = strSql + " AND  l.datecd=‘" + txtbDce + "‘";
            }
            if (txtbPdt != "")
            {
                strSql = strSql + " AND  l.prodcd=‘" + txtbPdt + "‘";
            }
            if (txtbRID != "")
            {
                strSql = strSql + " AND  l.ReelID=‘" + txtbRID + "‘";
            }
            return SqlHelper.Query(strSql);
        }

通过判断这几个界面上的文本框和复选框，来追加SQL中的查询条件最为方便 且简单。

原文地址：https://www.cnblogs.com/cdjbolg/p/11771783.html