TDBComboBox question
lazarus / 31-LCL

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xaver13 · 2017-11-27 21:11

Hello I have problem to get checked value from TDBComboBox

I fill it
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i  
DBCmbTyp.Items.Add('n/a');  while not Query11.EOF do  begin    if
Query11['col_3'] <> null then     
DBCmbTyp.Items.Add(Query11['col_3']);      Query11.Next;  end;
But how to get which value user selected ?

I can compile something as

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i
DBCmbTyp.Text
I need to use it in a code
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i
Query1.SQL.Text := 'Select * From wallet where col_3 = ' +
DBCmbTyp.Text; 
but it works not.

Please do you know simple and clever solution?

Thank you very much for help.

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PatBayford · 2017-11-27 22:37

DBCmbTyp.Items holds the text values of the entries.
DBCmbTyp.ItemIndex holds the index of the selected item in the list,
assuming you do not allow multi-select.
So, the selected entry from  the list is given by
DBCmbTyp.Items[DBCmbTyp.ItemIndex]

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fpcoder · 2017-11-27 23:33

If your intention is to do master/detail (using one query or list to
select a resultset with another query) then you may have a look at the
tutorial below. There is no need to set the SQL.Text manually, it is
automatic if you learn how to do it:

http://wiki.freepascal.org/MasterDetail