如何允许两个或更多用户同时在我的数据库中添加记录？

Question

我是数据库中的新手，这不是我的课程，但我喜欢编程。

我创建了一个简单的数据库，客户可以使用它来请求样品。

我的问题是，当两个用户添加新记录时，我无法使数据库正常工作。

以下是我们点击“发送”按钮时的代码。

        DoCmd.SendObject acSendNoObject, , , _
        "michael.manalo@yahoo.com;", _
        , , _
        "Sample Request from " & [Location], "Dear RCM Project Engineering, " & Chr$(13) & Chr$(13) & _
        "I would like to request for samples to be shipped to:" & Chr$(13) & Chr$(13) & _
        [Contact] & Chr$(13) & [Shipping Address] & Chr$(13) & Chr$(13) & _
        "Details of my request were recorded in SRN " _
        & [SRN] & Chr$(13) & Chr$(13) & _
        "The customer is requesting for:" & Chr$(13) & Chr$(13) & _
        [QTY1] & " " & [PN1] & ", " & [Des1] & Chr$(13) & _
        [QTY2] & " " & [PN2] & ", " & [Des2] & Chr$(13) & _
        [QTY3] & " " & [PN3] & ", " & [Des3] & Chr$(13) & _
        [QTY4] & " " & [PN4] & ", " & [Des4] & Chr$(13) & _
        [QTY5] & " " & [PN5] & ", " & [Des5] & Chr$(13) & _
        [QTY6] & " " & [PN6] & ", " & [Des6] & Chr$(13) & _
        [QTY7] & " " & [PN7] & ", " & [Des7] & Chr$(13) & _
        [QTY8] & " " & [PN8] & ", " & [Des8] & Chr$(13) & Chr$(13) & _
        "Please note of the following: " & Chr$(13) & Chr$(13) & _
        [Remarks] & Chr$(13) & Chr$(13) & _
        "Expected Delivery Date is on: " & [Requested Delivery Date] & Chr$(13) & Chr$(13) & _
        "Thank You!" & Chr$(13) & Chr$(13) & Form_Choose.user & Chr$(13) & [Position]

        DoCmd.Save acForm, "Sample_Requisition"

        [Requestor] = Form_Choose.user

[Requestor]字段是必需的，我将其锁定以供用户编辑，因为我希望客户在保存记录之前成功通过电子邮件发送请求。如果他们成功通过电子邮件发送请求，当前用户（来自“选择”表单）将自动记录在请求者字段中。