SQL 查询包含 / isabout 在 SQL Server Management Studio 中完美运行，但它不在代码后面

Question

我想问我做错了什么。 我有这个查询在 SQL Server Management Studio 中完美运行：

select * 
from products, containstable(products, prod, 'isabout("laptop anybrand" weight (1))') as resultado 
where products.ImageIDS = resultado.[Key] 
order by resultado.[Rank] desc

但是当我将它放入代码隐藏时，它不起作用，并且是这样的：

select * 
from products, containstable(products, prod,'isabout(" + searcht.Text + " weight (1))') as resultado 
where products.ImageIDS = resultado.[Key] 
order by resultado.[Rank] desc

调试器没有发送任何错误，但它不起作用，接下来我发布我正在使用整个查询的代码：

Private Sub BindGrid2()
    Dim use As SqlConnection

    use = New SqlConnection("Data Source=DESKTOP-50SIV8B\SQLEXPRESS;Initial Catalog=cupon2; User ID=XXXX; password=XXXX")
    use.Open()

    Dim queryy As String = "select * from products, containstable(products, prod,'isabout(" + searcht.Text + " weight (1))') as resultado where products.ImageIDS = resultado.[Key] order by resultado.[Rank] desc"

    Dim DAA As SqlDataAdapter = New SqlDataAdapter(queryy, use)
    Dim DTT As New Data.DataTable

    searchid.Text = ""
    subc.Items.Clear()
    ids.Items.Clear()

    DAA.Fill(DTT)

    gv2.DataSource = DTT
    gv2.DataBind()

    use.Close()
End Sub

希望任何人都可以帮助我有什么问题。

谢谢！

Answer 1

查看 SSMS 查询中的此字符串文字：

'isabout("laptop anybrand" weight (1))'

请注意，文字本身包含搜索键周围的双引号。

现在看一下VB的摘录：

'isabout(" + searcht.Text + " weight (1))'

这里有双引号，但它们不是最终查询的一部分，并且代码中没有任何内容可以确保添加它们。

您应该做的是像这样更改 SSMS 版本：

DECLARE @SearchKey nvarchar(50) = N'laptop anybrand'
SELECT ... containstable(products, prod, N'isabout("' + @SearchKey  + '" weight (1))')

您可能必须在 SSMS 中使用它来让它再次工作，但是当它在 VB 中做同样的事情时。 请注意我添加的评论：

'Move all your database code into it's own module!
Friend Module DB
    Private connectString As String = "Data Source=DESKTOP-50SIV8B\SQLEXPRESS;Initial Catalog=cupon2; User ID=XXXX; password=XXXX"

    Public Function SearchProducts(searchKey As String) As DataTable
        'String literals can be more than one line now
        Dim query As String = "
SELECT * 
FROM products p
INNER JOIN containstable(products, prod,'isabout("" + @SearchKey + "" weight (1))') as resultado 
    ON p.ImageIDS = resultado.[Key] 
ORDER BY resultado.[Rank] DESC"

        Dim result As New DataTable()
        'Using blocks guarantee the connection is closed, **even if an exception is thrown!**
        Using cn As New SqlConnection(connectString), _
              cmd As New SqlCommand(query, cn), _
              da As New SqlDataAdapter(cmd)

             'Parameterized queries stop lots of bugs, hackers, and are **faster**
             cmd.Parameters.Add("@SearchKey", SqlDbType.NVarChar, 50).Value = searchKey
             da.Fill(result)
        End Using
        Return result.Tables(0)
    End Function
End Module

Private Sub BindGrid2()
    searchid.Text = ""
    subc.Items.Clear()
    ids.Items.Clear()

    gv2.DataSource = DB.SearchProducts(searcht.Text)
    gv2.DataBind()
End Sub

Answer 2

感谢您的回答，它是完整的，但我找到了一个更简单的解决方案。 这是：

String.Format("select * from products, freetexttable(products, prod,'isabout({0}{1}{2} weight (1))') as resultado where products.ImageIDS = resultado.[Key] order by resultado.[Rank] desc", """", searcht.Text.Trim(), """")