检查数据库中的链接表是否已更新/更改 [英] Check if a linked table in the database has been updated/changed
问题描述
VBA中是否有办法检查数据库中的链接表是否已更新
？
示例：
我有表格LedgerTemp这是一个文本文件的直接链接
局域网Ledger.txt
这个文本文件定期更新（覆盖）通过
一些大型机工作日夜
。
现在我只需手动运行一个宏，它只是从链接的LedgerTemp中基本上附加数据
。桌子到本地桌子Ledger
有没有办法我可以查看我的链接表是否已更改，如果是这样的话，我会检查
触发我的宏附加新数据？
谢谢
Cliff
Is there a way in VBA to check if a linked table in the database has
been updated?
Example:
I have a table "LedgerTemp" which is a direct link to a text file on
the LAN "Ledger.txt"
This text file is periodically updated (overwritten) through out the
day and night by some mainframe jobs.
Right now I just manually run a macro that just basically appends data
from the linked "LedgerTemp" table to a local table "Ledger"
Is there a way I can check to see if my linked table has changed and
if so trigger my macro that appends the new data?
Thanks
Cliff
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VBA中是否有办法检查数据库中的链接表是否有
已更新？
示例：
我有一张桌子LedgerTemp这是一个文本文件的直接链接
局域网Ledger.txt
这个文本文件定期更新（覆盖）通过
一些大型机工作日夜
。
现在我只需手动运行一个宏，它只是从链接的LedgerTemp中基本上附加数据
。桌子到本地桌子Ledger
有没有办法我可以查看我的链接表是否已更改，如果是这样的话，我会检查
触发我的宏附加新数据？
谢谢
Cliff
Is there a way in VBA to check if a linked table in the database has
been updated?
Example:
I have a table "LedgerTemp" which is a direct link to a text file on
the LAN "Ledger.txt"
This text file is periodically updated (overwritten) through out the
day and night by some mainframe jobs.
Right now I just manually run a macro that just basically appends data
from the linked "LedgerTemp" table to a local table "Ledger"
Is there a way I can check to see if my linked table has changed and
if so trigger my macro that appends the new data?
Thanks
Cliff
如果''改变''意思是''添加新记录''...然后你可以试试像
VBA：
如果DCount（*， LedgerTemp"）DCount（*，Ledger）然后RunYourMacro
宏
或者在启动时调用你的宏并将其放入您的宏观条件
DCount（" *";" LedgerTemp"）DCount（" *";" Ledger"）
Arno R
If ''changed'' means ''new records added'' ... then you could try something like
VBA:
If DCount("*","LedgerTemp") DCount("*","Ledger") then RunYourMacro
Macro
Or call your macro at startup and put this in the condition of your macro
DCount("*";"LedgerTemp") DCount("*";"Ledger")
Arno R
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在VBA中是否有办法检查数据中是否存在链接表基地已经更新了吗？
示例：
我有一张桌子LedgerTemp这是一个文本文件的直接链接
局域网Ledger.txt
这个文本文件定期更新（覆盖）通过
一些大型机工作日夜
。
现在我只需手动运行一个宏，它只是从链接的LedgerTemp中基本上附加数据
。桌子到本地桌子Ledger
有没有办法我可以查看我的链接表是否已更改，如果是这样的话，我会检查
触发我的宏附加新数据？
谢谢
Cliff
Is there a way in VBA to check if a linked table in the database has
been updated?
Example:
I have a table "LedgerTemp" which is a direct link to a text file on
the LAN "Ledger.txt"
This text file is periodically updated (overwritten) through out the
day and night by some mainframe jobs.
Right now I just manually run a macro that just basically appends data
from the linked "LedgerTemp" table to a local table "Ledger"
Is there a way I can check to see if my linked table has changed and
if so trigger my macro that appends the new data?
Thanks
Cliff
你可以使用FileDateTime函数检查文件的最后时间
更新。设置一个表格，如果需要，打开隐藏，并使用其计时器以您选择的间隔（例如300,000 - 这是5
）轮询
日期/时间以毫秒计的分钟数，并在Form_Timer事件中触发您的宏。
You can use the FileDateTime function to check when the file was last
updated. Set up a form, opened hidden if need be, and use its timer to poll
the date/time at an interval of your choice (say 300,000 - which is 5
minutes in milliseconds), and trigger your macro in the Form_Timer event.
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> VBA中是否有办法检查数据库中的链接表是否已更新？
示例：
我有一个表格LedgerTemp这是一个直接链接到局域网上的文本文件Ledger.txt
这个文本文件是由一些大型机作业日夜更新（覆盖）的。
现在我只需手动运行一个宏，它只是基本上从链接的LedgerTemp中附加数据
。表到本地表Ledger
有没有办法可以查看我的链接表是否已更改，如果是这样，会触发附加新数据的宏？
谢谢
Cliff
>Is there a way in VBA to check if a linked table in the database has
been updated?
Example:
I have a table "LedgerTemp" which is a direct link to a text file on
the LAN "Ledger.txt"
This text file is periodically updated (overwritten) through out the
day and night by some mainframe jobs.
Right now I just manually run a macro that just basically appends data
from the linked "LedgerTemp" table to a local table "Ledger"
Is there a way I can check to see if my linked table has changed and
if so trigger my macro that appends the new data?
Thanks
Cliff
您可以使用FileDateTime函数来检查文件的最后时间
更新。设置一个表格，如果需要，打开隐藏，并使用其计时器
以您选择的间隔轮询日期/时间（比如300,000 - 这是5
以毫秒为单位的分钟数，并在Form_Timer事件中触发您的宏。
You can use the FileDateTime function to check when the file was last
updated. Set up a form, opened hidden if need be, and use its timer to
poll the date/time at an interval of your choice (say 300,000 - which is 5
minutes in milliseconds), and trigger your macro in the Form_Timer event.
附录：我应该用以下内容完成：
如果日期/时间在Form_Timer事件中触发你的宏已经改变了。
Addendum: I should have finished that with:
and trigger your macro in the Form_Timer event if the date/time has changed.
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