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Preferred way to do "update row, or insert if it doesn't exist" using TableAdapters in dataset designer

hi there

the topic says it all.

I have a outer join select statement in tableadapter that populates
GridView, I want to make it updatetable, so I need to provide an update
command for table adapter.
the problem is that not all rows in gridview exist in database (since
it's an outer join) so I want to UPDATE statement to insert the row if
it doesn't exist.

What's the best practice?

thanks

Apr 12 '06 #1
1 5126
The Sql "Pattern" for this would be (pseudocode)

IF NOT EXISTS( SELECT PrimaryKey from table where primaryKey=@primarykey)
BEGIN
INSERT INTO TABLE ---etf
END
ELSE
BEGIN
UPDATE TABLE SET .... etc
END

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"H5N1" wrote:
hi there

the topic says it all.

I have a outer join select statement in tableadapter that populates
GridView, I want to make it updatetable, so I need to provide an update
command for table adapter.
the problem is that not all rows in gridview exist in database (since
it's an outer join) so I want to UPDATE statement to insert the row if
it doesn't exist.

What's the best practice?

thanks

Apr 12 '06 #2

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