How to check an item already entered in a listview if i am entering data from a combo box from two tables for an id as value member based on group

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How to check an item already entered in a listview if i am entering data from a combo box from two tables for an id as value member based on group...I mean there is both software id and asset id that can be added in the listview based on the group software and hardware....If software software item with software id else asset item with asset id will be added to listview....How to check duplicate items while adding to listview if so....

Posted 13-Apr-13 16:18pm

Korathu 2

Updated 13-Apr-13 19:18pm

v4

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Sergey Alexandrovich Kryukov · Answer 1 · 2013-04-13T16:33:00

Solution 1

Wrong approach. Prepare a data set which already does not contains duplicates and populate the control with it. Better yet, think why do you have duplicates in first place and think if you can prevent it. Base all you logic on data, not controls showing data.

—SA

Posted 13-Apr-13 16:33pm

Sergey Alexandrovich Kryukov

Comments

Abhinav S 14-Apr-13 2:02am

5!

Sergey Alexandrovich Kryukov 14-Apr-13 2:47am

Thank you, Abhinav.
—SA

Abhinav S · Answer 2 · 2013-04-13T20:04:00

Solution 2

You can use LINQ to select distinct rows before assigning the source to the listview.
If you are using a sql query to build your source from a database, do the distinct filtering on the query side for enhanced performance.

Posted 13-Apr-13 20:04pm

Abhinav S

Comments

Sergey Alexandrovich Kryukov 14-Apr-13 2:49am

Agree, a 5.
—SA

Abhinav S 14-Apr-13 2:54am

Thank you SA.