C# 如何将参数传递给SQL查询？

*调用C#中的查询：***

我没看见接线员 查询：

SELECT BO.MISHPAHA AS MISHPAHA,
       BO.PRATI AS PRATI,
       TM.LongShem AS LongShem,
       TM.SHEM AS SHEM,**
       TM.semel AS semel,
       TM.OT AS OT,
       (select SUM(KOLOT)
        from TOZAOTR
        where MUAMAD=BO.ZEUT AND kalpi =@kalpiNum) AS Total,
       (select sum(kolot)
        FROM TOZAOTR
        WHERE kalpi =@kalpiNum) AS SuMall,
       ROUND((Total/(SuMall+0.00001))*100,2) AS pre
FROM (MUAMADIM AS MU LEFT JOIN BOHARIM AS BO ON MU.ZEUT=BO.ZEUT)
LEFT JOIN TMIFLAGA AS TM ON MU.MIFLAGA=TM.SEMEL;

---

你的问题是什么？你想要什么？您在调试器中看到“查询”了吗？还是希望进行此查询？我想您应该通过删除参数名称中的“@”来更改此行：OleDbParameter parameter=new OleDbParameter（“kalpiNum”，s）；非常感谢。这就是答案您使用的是什么数据库和提供程序？它可能不支持命名参数。

SELECT BO.MISHPAHA AS MISHPAHA,
       BO.PRATI AS PRATI,
       TM.LongShem AS LongShem,
       TM.SHEM AS SHEM,**
       TM.semel AS semel,
       TM.OT AS OT,
       (select SUM(KOLOT)
        from TOZAOTR
        where MUAMAD=BO.ZEUT AND kalpi =@kalpiNum) AS Total,
       (select sum(kolot)
        FROM TOZAOTR
        WHERE kalpi =@kalpiNum) AS SuMall,
       ROUND((Total/(SuMall+0.00001))*100,2) AS pre
FROM (MUAMADIM AS MU LEFT JOIN BOHARIM AS BO ON MU.ZEUT=BO.ZEUT)
LEFT JOIN TMIFLAGA AS TM ON MU.MIFLAGA=TM.SEMEL;