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How to autocorrect a wrong input on a cell of DBGrid?

I want my DBGrid is able to autocorrect a wrong input on a cell
when the focus moves to a new cell. Currently, I've tried the
following techniques but it fails:

(1) Handling OnColExit event and do the correction when it's     necessary. The problem is, OnColExit event only occurs if     user move the focus to a new different column. This event     doesn't occur if user move the focus to a different row at     the same column.

(2) Handling TField.OnValidate event and do the correction when it's necessary. The problem is, it will continuously execute the TField.Onvalidate event because any writing to a cell will also execute the TField.OnValidate event.

Anybody here could tell me how the best way to do that?

Thank's in advance
0
setankabir
Asked:
setankabir
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1 Solution
 
kretzschmarCommented:
? what do you autocorrect ?

maybe you can use the onBeforePost-event of the Dataset

meikl ;-)
0
 
setankabirAuthor Commented:
OnBeforePost event doesn't occur when user moves the focus to a different column at the current row.
0
 
Amir AzhdariCommented:
setankabir ,
try with DBGrid1DrawDataCell event
it mean :


procedure TForm1.DBGrid1DrawDataCell(Sender: TObject; const Rect: TRect;
  Field: TField; State: TGridDrawState);
begin
adotable1.edit;
if field.asstring='HLEP' then
   field.Asstring:='HELP';

end;
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Amir AzhdariCommented:
and better code :

procedure TForm1.DBGrid1DrawDataCell(Sender: TObject; const Rect: TRect;
  Field: TField; State: TGridDrawState);
begin
adotable1.edit;
if  (field.FieldNo=0) { just do if it's the first column} AND (field.DataType=ftstring)   then
begin
if field.asstring='HLEP' then
   field.Asstring:='HELP'
  else
if field.asstring='TSET' then
   field.Asstring:='TEST'
end
else
if field.DataType=ftinteger then
begin
if field.asinteger=12 then
   field.Asinteger:=121
  else
if field.asinteger=13 then
   field.Asinteger:=131;
end;

0
 
setankabirAuthor Commented:
How do I know the index and value of the cell just before the focus moved?

DBGrid.SelectedField.AsString in the OnDrawDataCell event only give me value of the cell at current focus (after the focus moved). I've also tried to get the index of previous selected cell  by updating my own variable which is set to the current index of selected cell on the OnEnter and OnColEnter event and then use the variable on the OnDrawDataCell event, but the result was just the same with DBGrid.SelectedField.AsString statement. What should I do now?
0
 
Amir AzhdariCommented:
in that case you should work with one of these events:  ADOTable1BeforePost   OR   ADOTable1BeforeScroll

it mean :

procedure TForm1.ADOTable1BeforePost(DataSet: TDataSet);
begin
showmessage(inttostr(dbgrid1.DataSource.DataSet.RecNo));
showmessage(dbgrid1.DataSource.DataSet.Fields[0].asstring);
end;


OR :

procedure TForm1.ADOTable1BeforeScroll(DataSet: TDataSet);
begin
showmessage(inttostr(dbgrid1.DataSource.DataSet.RecNo));
showmessage(dbgrid1.DataSource.DataSet.Fields[0].asstring);
end;

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