Jos wrote:
> I have a control derived from CompositeDataboundControl, which is
> working fine at run time, but I can't get the control to draw itself
> at design time.
> I have overridden the GetSampleDataSource method, so that my control
> designer can provide dummy data.
> The problem seems to be that the GetDesignTimeHtml method is called
> three times when the control is refreshed in the designer.
> The first time the GetSampleDataSource method will also be called
> correctly, and all goes well.
> But the second and third time, GetSampleDataSource is not called, and
> some other sample data with column names such as "Databound Col0" is
> offered to the control, which it can't handle (it expects columns
> with particular names). I'm guessing that this is somehow caused by
> the DataSourceControl.
> Also, when a property is changed in the property pane, and this
> causes the control to rebind in the designer, GetSampleDataSource is
> not being called either, and the control is stuck again with
> "Databound Col0" columns.
> There is very little documentation on the net about this.
> GetSampleDataSource only gets 4 hits on Google.
> Does anybody know more about this problem?
>
> Jos