asp.net - Controls.Remove() does not work after CreateChildControls? -


i developing sharepoint 2010 non-visual webpart displays kind of data in big table. table rows should filtered selecting filter criterium dropdownlist part of webpart.

the onselectedindexchanged event of dropdownlist fired after createchildcontrols , before onprerender. because cells of table contain linkbuttons onclick event attached, must created in createchildcontrols in order onclick events fired.

i don't know rows of table hide until onselectedindexchanged of dropdownlist fired, create possible table rows in createchldcontrols , try remove filtered ones later in onselectedindexchanged event directly or in onprerender. rows physically removed parent table's control collection, nevertheles displayed.

as test, tried remove random rows @ end of createchildcontrols method after creating them, worked , rows not rendered.

how remove rows: 

  table mt = findcontrol("matrixtable") table;    helpers.log("controls in table: " + mt.controls.count);   foreach (int kdid in kdidsinvisible)   {      tablerow c = mt.findcontrol("kdrow" + kdid) tablerow;      helpers.log(c.id);      mt.controls.remove(c);   }   helpers.log("controls in table: " + mt.controls.count);

output:

controls in table: 88 controls in table: 2

but rows still rendered...

is there solution this? thank in advance!

debugging:

loop through , write screen ids of rows of table.

then loop through again, , write screen row ids deleted.

find 2 rows not delete, , see if have id @ all. there may split table cell or something.

worst case scenario, debug wp in visual studio , watch rows deleted 1 one , watch count of table see one's being skipped. try deleting rows immediate window, , see error get.


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