Getchanges problem on expression column

10 Apr 2007 1:22 PM

Bart

Hi,

I have a problem with the GetChanges() method when I use an expression column.
The expression is using data from a child relation.
When I call Getchanges I got an evaluation expression that the column from
my child relation doens't exist.
How can I work arround this issue?

Thanks
Bart

11 Apr 2007 7:34 AM

WenYuan Wang [MSFT]

Hi Bart,

Did you use DataSet.GetChanges() method to return the rows?
I haven't met such issue before. Would you please provide us the exact
error message and post some code-snippet for us?

Sincerely,
Wen Yuan
Microsoft Online Community Support
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11 Apr 2007 8:50 AM

Bart

Hi Wen,

Table1.getChanges()
Where Table1 has a child relation to Table2
An expression column in Table1 looks like this:
Table.SomeColumn.Expession = 'min(child(NameChildRel).TrekkerID)'

Thanks

Show quoteHide quote

"WenYuan Wang [MSFT]" wrote:

> Hi Bart,
>
> Did you use DataSet.GetChanges() method to return the rows?
> I haven't met such issue before. Would you please provide us the exact
> error message and post some code-snippet for us?
>
> Sincerely,
> Wen Yuan
> Microsoft Online Community Support
> ==================================================
> Get notification to my posts through email? Please refer to
> http://msdn.microsoft.com/subscriptions/managednewsgroups/default.aspx#notif
> ications.
>
> Note: The MSDN Managed Newsgroup support offering is for non-urgent issues
> where an initial response from the community or a Microsoft Support
> Engineer within 1 business day is acceptable. Please note that each follow
> up response may take approximately 2 business days as the support
> professional working with you may need further investigation to reach the
> most efficient resolution. The offering is not appropriate for situations
> that require urgent, real-time or phone-based interactions or complex
> project analysis and dump analysis issues. Issues of this nature are best
> handled working with a dedicated Microsoft Support Engineer by contacting
> Microsoft Customer Support Services (CSS) at
> http://msdn.microsoft.com/subscriptions/support/default.aspx.
> ==================================================
> This posting is provided "AS IS" with no warranties, and confers no rights.
>
>

11 Apr 2007 9:48 AM

WenYuan Wang [MSFT]

Hi Bart,
Thanks for your reply.

If you have a Expression Column in table, you should have to use
DataSet.getChanges() method rather than DataTable.getChanges() method. This
is because, DataTable.getChanges() method will create a new DataTable and
add the modified rows into this table. If the row has a Expression Column,
the new DataTable will meet an issue. The child table and relation doesn't
exist for the new DataTable. However, DataSet.getChanges() method will
create new dataset, table and relation.

In your scenario, you can use DataSet.getChanges() method to return a
DataSet and then get the special table from DataSet by tablename.

Please let me know if you still have anything unclear. I'm glad to assist
you.
Have a great day,
Sincerely,
Wen Yuan
Microsoft Online Community Support

13 Apr 2007 10:06 AM

WenYuan Wang [MSFT]

Hi Bart,

I haven't heard from you two days. Have you resolve the issue now?
If there is anything we can help with, please update here and I will follow
up.I'm glad to work with you.

Have a great weekend,
Sincerely,
Wen Yuan
Microsoft Online Community Support