Gantt chart not redrawing chart

[dave]

Hi,

I've a Gantt chart that needs to be refreshed and the chart needs to be updated. I've tried:

Code: Select all

 tChartGantt[0].Clear();

and

Code: Select all

 tChartGantt.Invalidate(); 

but in both of them, the original chart remains and the newer chart is overlapped over it in a different colour.

Please advise. Thanks.

[Narcís]

Hi dave,

Instead of calling Invalidate have you tried this?

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Bitmap bmp = tChartGantt.Bitmap;

[dave]

Hi Narcis,

I tried the bitmap function but still couldn't work. I bind my chart to a dataset on the windows form, and the code below basically populated the chart when the user clicks on a button:

Code: Select all

tChartGantt[0].Clear();
gantt1.DataSource = dt2; //dt2 is the DataTable which contains the data
gantt1.CheckDataSource();
//tChartConstraintsGantt.Invalidate();

Currently, each time the above code is run, it'll overlap the earlier chart. I'm not sure how I could clear the first chart before redrawing it again.

Thanks.

[Narcís]

Hi dave,

Could you please send us a simple example project we can run "as-is" to reproduce the problem here?

You can post your files at news://www.steema.net/steema.public.attachments newsgroup or at our upload page.

Thanks in advance.

[dave]

Hi Narcis,

I managed to solve it. Silly error really, I forgot to clear my datatable upon refresh.

Thanks anyway.

Cheers!