know if a datatable is being schemafilles but not ever filles

[Andrea Caldarone]

Hi all,

in my program I initialize a lot of datatable (member of the same dataset)
with the .FillSchema method of the adapter at the startup. After when a user
trough the guy requests a such data, I populate the datatable with the .Fill
method.
If I have a such datatable (I'me sure it have been schemafilled) can I know
if that table is have been filles with .Fill method? If the table has 0 rows
is it because the sql table has 0 rows or because it hasn't been filled?

 

[William \(Bill\) Vaughn]

Perhaps you can add a row that has known place-holder values post
SchemaFill. Before Fill, clear the table and test for the place-holder to
see if "real" data was loaded. Why pre-populate with schema?

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[Cor Ligthert [MVP]]

Andrea,

The fill does filling the schema as well. Not complete but for that is as
well an command.

"missing schema etc).

Cor

 

[Andrea Caldarone]

Perhaps you can add a row that has known place-holder values post
SchemaFill. Before Fill, clear the table and test for the
place-holder to see if "real" data was loaded. Why pre-populate with
schema?

I load the database's schema into my dataset this task requires few time,
after that I can create (I automatically do this with a class of my own) all
the foreign key relationship, customize the datatables and pass them to the
controls of my application.
When I really know that some data have to be shown to the end user, I
populate the datatables involved with the fill command.
But before invoke the .Fill method it is useful to konw if the datatable has
ever been filled:

datatable with 0 record -> is it an empty one or it has never been filled?

datatable with more than 1 records -> sure, it has just been filled, no
other .Fill is required