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DHTMLX Grid- How to get rownum of the dataset send to grid?

Dear All,
I am updating a table which do not have any primary key.
I can get <rowIndex>_gr_id from request but this is related to records in grid.
Any way to associate unique number with the database record that can be got from grid and used in the update statement?
Or How to get rownum of the dataset send to grid?
Or
How to update multiple records of table which doesn't have any primary key?


-Sameer

DHTMLX19032009

You can store additional row data at the userdata or in the attributes. Please see more information here http://dhtmlx.com/docs/products/dhtmlxGrid/doc/articles/Storing_additional_data.html#grid_art_userdata