Question

我使用aspx和vb.net在访问2007数据库中跳过多个关系表时遇到问题。遗憾的是，我无法控制17+表格db结构或格式。

我尝试调用的查询在访问时正常工作，但在通过asp和vb.net运行时会抛出以下错误。

No value given for one or more required parameters.

Tbl_A结构：

ID (PK)
Device_SiteID (Linked to Tbl B)
StatusID
...

Tbl_B结构

Device_SiteID
SiteID (Linked To Tbl_C)
...

Tbl_C结构

SiteName
SiteID
...

码

Dim path As String = System.Web.HttpContext.Current.Server.MapPath("..\abcd\db\db.accdb")
        Dim dbCon As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source="+ path)
dbCon.Open()
Dim sql As String = ""
sql = "SELECT Tbl_FMOPM828.[StatusID] "
sql += "FROM Tbl_Sites "
sql += "INNER JOIN (LTbl_Device_Sites "
sql += "INNER JOIN Tbl_FMOPM828 "
sql += "ON LTbl_Device_Sites.[Device_SitesID] = Tbl_FMOPM828.[Device_SitesID]) "
sql += "ON Tbl_Sites.SitesID = LTbl_Device_Sites.SitesID "
sql += "WHERE ((Not(Tbl_FMOPM828.StatusID)=1) AND ((Tbl_Sites.SitesName)=Timbucktoo))"

Dim statusCmd As N`ew OleDbCommand(sql, dbCon)
...

Answer 1

尝试将蒂姆布克图括在引号='廷巴克图'

中

vb.net中Access 2007 db的双内连接查询

1 个答案: