I am using asp.net 3.5 with Vb, to create 3 cascading DropDown's. The first DDL loads as soon as the page loads, then 2nd DDL loads when a selection is made on the 1st DDL and 3rd loads when a selection is made from both 1st and 2nd. Now the problem arises when a selection is made from 2nd DDL, the page postsback and the items in 1st DDL duplicate. So, now I have 2 sets of same values in DDL1. Is there any way I can make this DDL distinct?
Another observation is that when a selection is made from DDL2 only then is the DDL1 duplicating. When DDL3 selection is made, then DDL1 doesnt duplicate.
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SelectCommand="SP1" SelectCommandType="StoredProcedure">
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