根据添加记录的年份创建顺序ID值 [英] Create sequential ID value based on the year that a record is added

问题描述

我正在使用Access 2013数据库，该数据库将具有输入到数据库中并与其他属性链接的不同实用程序.每个极点将具有唯一的全局ID，为简化工作，我想添加另一个更简单的唯一ID.我希望在将新的极点导入数据库时​​自动填充此字段.该ID将如下所示:

I am working on an Access 2013 database that will have different utility poles entered into the database and linked with other attributes. Each pole will have a unique global ID, and to simplify working I would like to add another unique ID that is more simple. I would like this field auto populated when a new pole in imported into the database. The ID would go as follows:

SAC(年)-(递增的数字，不能重复)

SAC(year)-(Escalating number, cannot be a duplicate)

例如SAC16-20(这是2016年进入数据库的第20个极点)

ex. SAC16-20 (This would be the 20th pole entered into the database in 2016)

例如SAC15-2536(将在2015年进入第2536杆)

ex. SAC15-2536 (Would be the 2536th pole entered in 2015)

如果有人可以帮助我生成一些代码来使此自动填充ID字段起作用，我将不胜感激.

If anyone could help me generate some code to make this auto populate ID field work I would greatly appreciate it.

推荐答案

在Access版本2010和更高版本中，您可以使用事件驱动的

With Access versions 2010 and later you can use an event-driven data macro to generate the sequential ID. For example, say you have a table named [poledata]. Open it in Design View and add two fields:

alternate_id_seq – 数字(长整数)
alter_id – 文字(20)

alternate_id_seq  –  Numeric (Long Integer)
alternate_id  –  Text(20)

将更改保存到表中，然后切换到数据表视图".

Save the changes to your table and then switch to Datasheet View.

在Access功能区中，切换到表格工具>表格"标签，然后单击更改前"

In the Access ribbon, switch to the "Table Tools > Table" tab and click "Before Change"

然后输入以下宏...

then enter the following macro ...

...或将以下XML粘贴到宏编辑器窗口中

... or paste the following XML into the macro editor window

<?xml version="1.0" encoding="utf-16" standalone="no"?>
<DataMacros xmlns="http://schemas.microsoft.com/office/accessservices/2009/11/application">
    <DataMacro Event="BeforeChange">
        <Statements>
            <ConditionalBlock>
                <If>
                    <Condition>[IsInsert]</Condition>
                    <Statements>
                        <Action Name="SetLocalVar">
                            <Argument Name="Name">next_seq</Argument>
                            <Argument Name="Value">1</Argument>
                        </Action>
                        <Action Name="SetLocalVar">
                            <Argument Name="Name">prefix</Argument>
                            <Argument Name="Value">&quot;SAC&quot; &amp; Year(Date()) Mod 100 &amp; &quot;-&quot;</Argument>
                        </Action>
                        <LookUpRecord>
                            <Data Alias="pd">
                                <Query>
                                    <References>
                                        <Reference Source="poledata" Alias="pd" />
                                    </References>
                                    <Results>
                                        <Property Source="pd" Name="alternate_id_seq" />
                                    </Results>
                                    <Ordering>
                                        <Order Direction="Descending" Source="pd" Name="alternate_id_seq" />
                                    </Ordering>
                                </Query>
                                <WhereCondition>[pd].[alternate_id] Like [prefix] &amp; &quot;*&quot;</WhereCondition>
                            </Data>
                            <Statements>
                                <Action Name="SetLocalVar">
                                    <Argument Name="Name">next_seq</Argument>
                                    <Argument Name="Value">[pd].[alternate_id_seq]+1</Argument>
                                </Action>
                            </Statements>
                        </LookUpRecord>
                        <Action Name="SetField">
                            <Argument Name="Field">alternate_id_seq</Argument>
                            <Argument Name="Value">[next_seq]</Argument>
                        </Action>
                        <Action Name="SetField">
                            <Argument Name="Field">alternate_id</Argument>
                            <Argument Name="Value">[prefix] &amp; [next_seq]</Argument>
                        </Action>
                    </Statements>
                </If>
            </ConditionalBlock>
        </Statements>
    </DataMacro>
</DataMacros>

现在，当向表中添加新行时，将自动填充[alternate_id_seq]和[alternate_id]列.

Now when new rows are added to the table the [alternate_id_seq] and [alternate_id] columns will be populated automatically.

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