Steema Central

Hi

I have the following setup:
Form with DBChart1, with one series, that references dataset IBOQuery2
DBGrid that references dataset IBOQuery2
DBNavigatorBar that references dataset IBOQuery1

IBOQuery1 = master Query.
IBOQuery2 = Child Query, that just references the active record in IBOQuery1.

Now the DBChart should show the active record, and so too the DBGrid.
I run the application.
The first record shows correctly in the chart, and the grid.
when I click on next record, the DBGrid updates to accurately reflect the next record, but the DBchart does not!

I tried setting DBChart.AutoRefresh to true, but doesn't help.

The only way I got the chart to update its display when scrolling the datset, was to create an onclick event for the Navbar, and then DBChart1.RefreshData;

Is this behaviour correct. Shouldn't the chart refresh itself, when the datasets data changes, as I scroll through it with the navbar?

Regards

Adrian

Hi Adrian,

Have you tried calling Series.CheckDataSource method?

Hi Narcis

Help me if I'm incorrect:

My understanding is that DBChart is 'DATA-AWARE'.

Thus why should I call anything to refresh the display.
The DBGrid automatically updates with to reflect the newer data as the dataset changes, why doesn't the DBChart do that?

Regards

Adrian

Hi Adrian,

to refresh the DBChart you have to do it in similar way as in the example you can find into the Demo Features project under :
All Features -> Welcome ! -> DataBase Charts -> Single Record.

Please check the source code of this example.