在 asp.net 中插入后获取主键(visual basic)-C#/.NET问题

Getting primary key after an insert in asp.net (visual basic)(在 asp.net 中插入后获取主键(visual basic))

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问题描述

我正在添加这样的记录:

I'm adding a record like this:

    Dim pathString As String = HttpContext.Current.Request.MapPath("Banking.mdb")
    Dim odbconBanking As New OleDbConnection _
             ("Provider=Microsoft.Jet.OLEDB.4.0;" & _
             "Data Source=" + pathString)
    Dim sql As String
    sql = "INSERT INTO tblUsers ( FirstName, LastName, Address, City, Province, Zip, Phone, UserName, [Password])" & _
              " VALUES ('" & firstName & "', '" & lastName & "', '" & address & _
            "', '" & city & "', '" & province & "', '" & zip & "', '" & phone & "', '" & username & "', '" & password & "');"
    odbconBanking.Open()
    Dim cmd As New OleDbCommand(sql, odbconBanking)
    cmd.ExecuteNonQuery()
    odbconBanking.Close()

主键是一个名为 UserID 的自动编号字段.那么，如何获取我刚刚插入的记录的主键呢?

The primary key is an autonumber field called UserID. So, how do I get the primary key of the record I just inserted?

谢谢.

推荐答案

我相信参数化查询应该是这样的:

I believe a parameterized query would look something like this:

Dim pathString As String = HttpContext.Current.Request.MapPath("Banking.mdb")
Dim odbconBanking As New OleDbConnection _
     ("Provider=Microsoft.Jet.OLEDB.4.0;" & _
     "Data Source=" + pathString)
Dim sql As String
sql = "INSERT INTO tblUsers ( FirstName, LastName, Address, City, Province, Zip, Phone, UserName, [Password])" & _
      " VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?);"
odbconBanking.Open()
Dim cmd As New OleDbCommand(sql, odbconBanking)

//Add Params here
cmd.Parameters.Add(new OdbcParameter("@FirstName", firstName))
cmd.Parameters.Add(new OdbcParameter("@LastName", lastName))
//..etc

//End add Params here

cmd.ExecuteNonQuery()
Dim newcmd As New OleDbCommand("SELECT @@IDENTITY", odbconBanking)
uid = newcmd.ExecuteScalar

odbconBanking.Close()

我的语法可能有点偏离，因为我更习惯使用 Sql Server 库而不是 Odbc 库，但这应该可以帮助您入门.

My syntax might be a bit off as I am more accustomed to using the Sql Server library and not the Odbc library, but that should get you started.

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