Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

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

Posted on 2004-10-01
9
355 Views
Last Modified: 2010-04-05
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
Comment
Question by:setankabir
  • 3
  • 2
9 Comments
 
LVL 27

Expert Comment

by:kretzschmar
ID: 12200396
? what do you autocorrect ?

maybe you can use the onBeforePost-event of the Dataset

meikl ;-)
0
 

Author Comment

by:setankabir
ID: 12206354
OnBeforePost event doesn't occur when user moves the focus to a different column at the current row.
0
 
LVL 6

Expert Comment

by:Amir Azhdari
ID: 12206525
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;
0
Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

 
LVL 6

Accepted Solution

by:
Amir Azhdari earned 250 total points
ID: 12206652
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
 

Author Comment

by:setankabir
ID: 12210685
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
 
LVL 6

Expert Comment

by:Amir Azhdari
ID: 12211001
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;

0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Intraweb submit form as a POST request 4 324
Downloading email attachments 2 79
How to convert memory stream to PDF file 6 108
how to change, disabled button color FMX ? 1 40
Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question