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Assign table´s to a ComboBox linked to TDBChart

Posted on 1998-10-25
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Last Modified: 2010-04-06
I need help with assigning my table's (paradox7) to a ComboBox or a TDBLookUpComboBox and then it should be updated in my TDBChart. I want the name of my table's in the ComboBox.

Anyone can help me?
Thanks!
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Question by:bert1
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6 Comments
 

Expert Comment

by:elkiors
ID: 1344218
Have you got the table connected to a TDataSource, you will need to do this I think.

eg. Link table1 to datasource1 then with the TDBLookupCombo point the datasource to datasource1 and then set the datafield for the table1 lookup field.

Also have a look at creating persistant lookup fields for your table, it takes a lot of pain out of creating lookups as delphi does all the linking and value assigning for you.

Let me know how you get on.
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Author Comment

by:bert1
ID: 1344219
I have the table connected to a TDataSource. In the datafield in LookUpComboBox I can choose the fields in my table, but im getting a circular error when I choose one field. But I want to have the all the tables in the LookUpComboBox... not a field in my table.

You see what I mean?
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Expert Comment

by:elkiors
ID: 1344220
Do you mean you want to create a list of table names to be shown in the combo ? If so let me know, and I'll post a code snippet.

Darren

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Author Comment

by:bert1
ID: 1344221
Yes that´s what I mean and I will link them to a TDBChart that updates when I change the name in the combo. I have different graph´s in the tables.
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Accepted Solution

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elkiors earned 50 total points
ID: 1344222
I've just realised, the code was less intensive than I thought.
Will this do

put a normal combo box on a form and add this code to the onshow event to populate the combo box with the tables in the alias you define. I got this straight from the online help, you could probably find a bit more to help with the chart and stuff.

procedure TForm1.FormShow(Sender: TObject);
var
  MyTables:TStringList;

begin
  MyTables := TStringList.Create;
  try
    Session.GetTableNames('DBDEMOS', '*.db',False, False, MyTables);
    { Add the table names to a combo box }
    ComboBox1.Items := MyTables;
  finally
    MyTables.Free;
  end;
end;

Hope this is what you wanted

Darren
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Expert Comment

by:elkiors
ID: 1344223
Is there anything else I can do ?

Darren

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