database - Gridview filter dropdownlist -

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so have vs 2015 project taking data oracle database, displaying gridview. gridview table large, , want filter (not sort) data via dropdownlist (ddl) outside of gridview.

(i.e. table 1500 entries, 15 columns, 1 column (spec) has 4 possible values of (en098, sa974, as0900, vx8762). user selects 1 of these values dropdown list (i.e. en098), table of 1500 entries displays (i.e. 670)that have en098 in spec column).

i have tried binding datasource (orclsrc) ddl link ddl via statement (where spec = control [in gui] control = dropdownlist1.selected) gridview (the gridview linked orclsrc), using wizard on gui side. upon running website, blank dropdownlist , no gridview.

i have followed tutorials , previous questions on this, solutions have not assisted in own problem.

declaring dropdownlist1 = param1; , setting control=param1 solved problem





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