vb6 - Fast Listview Loading -
the question simple 1 , many of know listview slower if hidden. there suggestions like:
- loading partial data , load on scrolling, though default there no scroll event
- load partial data , provide button load more (say 50) records
- load partial data, show screen , use timer load remaining data
what other suggestions?
how lockwindowupdate work? equal listview.visible = false? can 2 or more listviews locked using api?
edit
hyperlist looks great use complicated, can 1 please simplify or explain going on @ caller's end i.e. how fill array.
the obvious solution here cross between of mentioned; paging. load set number , allow user page backward , forward using numbered page sequence above or below listview control.
to speed further don't use active recordset; instead, load data array , directly drop information control. use alternative form if want edit information rather editing in listview control.
alternatively create own listview equivalent , write objects directly onto form using own format.
i think if have use lockwindowupdate you're going down wrong path. should able use appropriate property of control prevent user interference.
-- edit --
the idea read data array in memory , loop through , populate listview in similar way this:
private function testinsertlistview() long dim long dim j long dim lt long dim itmx listitem lt = timegettime ' add first row lvwtest = 1 set itmx = .listitems.add(, , "row" & & ";col 1") j = 2 mccols itmx.subitems(j - 1) = "row" & & ";col" & j - 1 next = 2 m_irows set itmx = .listitems.add(i, , "row" & & ";col 1") j = 2 mccols itmx.subitems(j - 1) = "row" & & ";col" & j - 1 next next end testinsertlistview = timegettime - lt end function (i found above example here.)
obviously you'd need modify above include reading of data should pretty straightforward. this link gives demo of ado getrows method allows read data.
