vb.net MS Access 使用SQL查询将带有自动编号主键列的记录插入到表中

Question

我想在带有自动编号列的表中插入一个新行。我的代码如下，我找不到如何与其他列同时插入自动数字列：

pth = My.Application.Info.DirectoryPath
Dim SQL = "INSERT INTO approved (id, word, approveds) VALUES (@idd, @word, @approval)"
Using Con As New OleDbConnection("Provider=Microsoft.ace.oledb.12.0; Data Source=" & pth & "database.mdb; User Id=; Password=;")
    Dim Cmd As New OleDbCommand(SQL, Con)
    Cmd.Parameters.Add("@idd", OleDb.OleDbType.VarChar).Value = @@identity
    Cmd.Parameters.Add("@word", OleDb.OleDbType.VarChar).Value = RichTextBox1.SelectedText
    Cmd.Parameters.Add("@approval", OleDb.OleDbType.VarChar).Value = "YES"
    Con.Open()
    Cmd.ExecuteNonQuery()
End Using

关键字@@identity不起作用;正确的方法是什么？

Answer 1

如果您将 SQL 列设置为身份自动增量，则无需传递 id 参数，而插入它将自动工作。

删除以下代码：

Cmd.Parameters.Add("@idd", OleDb.OleDbType.VarChar).Value = @@identity

附录：

当然，也要使用：

Dim SQL = "insert into approved (word, approveds) VALUES (@word, @approval)"

Answer 2

这有效：

 pth = My.Application.Info.DirectoryPath

            Dim SQL = "insert into approved (word, approveds) VALUES (@word, @approval)"
            Using Con As New OleDbConnection("Provider=Microsoft.ace.oledb.12.0; Data Source=" & pth & "database.mdb; User Id=; Password=;")
                Dim Cmd As New OleDbCommand(SQL, Con)
                Cmd.Parameters.Add("@word", OleDb.OleDbType.VarChar).Value = RichTextBox1.SelectedText
                Cmd.Parameters.Add("@approval", OleDb.OleDbType.VarChar).Value = "YES"
                Con.Open()
                Cmd.ExecuteNonQuery()
            End Using