Additional functions in DataColumn.Expression

[Sam]

Any one know of a way to make additional functions
available in a DataColumn.Expression? I'm thinking of
things like date manipulation (DateDiff, etc.).

Is it possible to inherit from DataColumn?

Would I have to handle Changed events in the columns on
which the Expression was dependant, and then do the
calculation myself.

Are there any third party DataSet controls that would do
this kind of thing?

 

[Miha Markic]

Hi Sam,

Why don't you compute manually the field?
Just use ColumnChanged event and beware of recursion.

 

[Guest]

I am hoping there is a 'nicer' solution than that.
Does anyone else have any other ideas?

 

[Kevin Yu [MSFT]]

Hi Sam,

As far as I know, in the DataSet in ADO.net, the only way to achieve this
is to handle the ColumnChanged event.

Kevin Yu
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