How To Validate Inserted Items In AJAX Combobox Against Database

Nov 30, 2010

I wonder how to validate if a inserted item in a Combobox exists in a database during postback? If the item.text exists, a errormessage should notify the user that the item already exists in the database. If the item does not exists in the database a inserting should be done.

Should i use the customvalidator and create a servervalidationfunction that searches my databasetable for the item name?

Should i validate inside one of the two ComboBox control events, ItemInserting and ItemInserted?

After validating the existence i would like to validate if the inserting to the database was successfull.

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