Question

我正在尝试检查来自label1的值是否存在于名为“NALOG，C，8”的dbf文件列中。 DBF文件中的标题我无法更改，因为它表示列的格式和字段大小。但是我得到了这个错误：“查询表达式中的语法错误（逗号）”NALOG，C，8 = @NAL“

这是完整的代码：

Dim con As New OleDbConnection
    Dim cmd As New OleDbCommand

    Dim FilePath As String = "C:\"
    Dim DBF_File As String = "PROMGL"
    Dim ColName As String = "NALOG,C,8"
    'Dim SQLstr As String = "SELECT * FROM " & DBF_File
    con.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & FilePath & _
    " ;Extended Properties=dBASE IV;User ID=Admin;Password="
    'cmd = New OleDbCommand("SELECT * FROM " & DBF_File)
    cmd = New OleDbCommand("SELECT * FROM PROMGL WHERE " & ColName & " = @NAL")


    cmd.Connection = con
    con.Open()
    cmd.Parameters.AddWithValue("@NAL", Label1.Text)
    Using reader As OleDbDataReader = cmd.ExecuteReader()
        If reader.HasRows Then
            con.Close()
            Label6.Text = "EXIST" & TextBox1.Text
            TextBox1.Text = ""
            TextBox1.Focus()

        Else
            Label6.Text = "DOESN'T EXIST"

        End If
    end using

感谢。

Answer 1

如果您有一个名为this的列：

Dim ColName As String = "NALOG,C,8"

然后我也会改变它：

Dim ColName As String = "[NALOG,C,8]"

Answer 2

请改用：

Dim ColName As String = "NALOG"

查询表达式中的语法错误（逗号），带逗号的标题

2 个答案: