How to retain values of dynamicaly created controls postback

Question

how to retain values of dynamically created table after postback..the problem is that everytime the postback is happen the dynamically created control disappear.
on my code:
i create dynamic table when user select into dropdown the functions are
-BindGrid();
-FinancialSKU();
-DynamicSKU();
-DynamicLinkSKU();
the remedy i did is that i call those function everypostback happen but it is not good because displaying of data are so slow ..T_T please help.