When I load a file with say 10,000 lines and a dozen columns, it takes a few seconds and the GUI freezes.
I would like to show a progress bar or use the TMSFNCWaitingIndicator to let the user know the file is loading..
I notice that TAdvStringGrid.OpenAndExecute can load the file pretty fast, and my progress bar completes, but
- the ImportDialog stays on screen until the grid refreshes
- for 10,000 rows, 12 columns, the grid takes 10x longer loading to refresh on screen than to load from CSV.
- so using OnFileProgress with a ProgressBar would show completed, the GUI hangs while waiting for the Grid to refresh with the data
Question: Assuming I really want to load ALL the data, what is the recommendation to let the user know to be have patience? 
smile:
The idea scenario I think would be that ImportDialog should close, and then show a progress box that takes into account the CSV file loading AND grid population of data and refresh timing...
Is there a similar Event I can use in TAdvStringgrid to show the latter?
procedure TForm1.ActionLoadDataExecute(Sender: TObject);
begin
CodeSite.EnterMethod( 'ActionLoadDataExecute' );
AdvGrid1.BeginUpdate;
try
// select file and import
CodeSite.Send( 'Before OpenAndExecute' );
if AdvGridImportDialog1.OpenAndExecute then
begin
CodeSite.Send( 'After OpenAndExecute' );
// is the first row headers? if yes
if AdvGridImportDialog1.FirstRowHeaders = False then
AdvGrid1.InsertRows(1, 0);
CodeSite.Send( 'After InsertRows' );
// Add S.No to the 0 column in the grid.
AdvGrid1.InsertCols(0,1);
AdvGrid1.AutoNumberCol(0);
AdvGrid1.AutoFitColumns;
CodeSite.Send( 'After InsertCols' );
end;
finally
CodeSite.Send( 'Before EndUpdate' );
AdvGrid1.EndUpdate;
CodeSite.Send( 'After EndUpdate' );
end;
CodeSite.ExitMethod( 'ActionLoadDataExecute' );
end;
procedure TForm1.AdvGrid1FileProgress(Sender: TObject; progress: SmallInt);
begin
AdvProgressBar1.Position := progress;
end;