whats new ¦  programming tips ¦  indy articles ¦  intraweb articles ¦  informations ¦  links ¦  interviews
 misc ¦  tutorials ¦  Add&Win Game

Tips (1541)

Database (90)
Files (137)
Forms (107)
Graphic (114)
IDE (21)
Indy (5)
Internet / LAN (130)
IntraWeb (0)
Math (76)
Misc (126)
Multimedia (45)
Objects/
ActiveX (51)

OpenTools API (3)
Printing (35)
Strings (83)
System (266)
VCL (242)

Top15

Tips sort by
component


Search Tip

Add new Tip

Add&Win Game

Advertising

97 Visitors Online


 
...locate on a non-indexed field in a TTable?
Autor: Damian Gorski
[ Print tip ]  

Tip Rating (6):  
     


{The following function can be added to your to your unit and called as follows:}

Locate(Table1, Table1LName, 'Beman');

{Table1 is your table component, Table1LName is TField you've add with the fields
editor (double click on the table component) and 'Beman' is the name you want to find.}

{Locate will find SValue in a non-indexed table}

function Locate(const oTable: TTable; const oField: TField;
  const sValue: string): Boolean;
var

  
bmPos: TBookMark;
  bFound: Boolean;
begin
  
Locate := False;
  bFound := False;
  if not oTable.Active then Exit;
  if oTable.FieldDefs.IndexOf(oField.FieldName) < 0 then Exit;
  bmPos := oTable.GetBookMark;
  with oTable do
  begin
    
DisableControls;
    First;
    while not EOF do
      if 
oField.AsString = sValue then
      begin
        
Locate := True;
        bFound := True;
        Break;
      end
    else
      
Next;
  end;
  if (not bFound) then
    
oTable.GotoBookMark(bmPos);
  oTable.FreeBookMark(bmPos);
  oTable.EnableControls;
end;

 

Rate this tip:

poor
very good


Copyright © by SwissDelphiCenter.ch
All trademarks are the sole property of their respective owners