如何使用vb.net在带有参数的SQL插入语句上显示特定的错误消息？

Question

Basically, I have a SQL Insert Statement with some Paramaters:

sqlQuery = "INSERT INTO tbl_visitor_info(lname, fname) VALUES(?, ?)"
    Dim cmd As New OleDbCommand
    Dim con As New OleDbConnection(access_connection)
    Try
        con.Open()
        With cmd
            .Connection = con
            .CommandType = CommandType.Text
            .CommandText = sqlQuery

            .Parameters.Add("@lname", OleDbType.VarChar).Value = lname
            .Parameters.Add("@fname", OleDbType.VarChar).Value = fname
            .ExecuteNonQuery()
        End With
    Catch ex As Exception
        MsgBox(ex.Message)
    End Try
    con.Close()

Now, for example, an Invalid Data was entered for either one of the Parameters
Is it possible for Prompt which parameter causes the error?
The Try Catch only returns "There is an Error in your INSERT Statement"
I am using MS Access 2010 as database.

Answer 1

尝试用参数名称替换查询中的问号：

sqlQuery = "INSERT INTO tbl_visitor_info(lname, fname) VALUES(@lname, @fname)"