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.NET Forum / .NET Framework / New Users / July 2005Custom control container behavior in designer
Hey, created a custom control that includes a panel. I want to use the panel as a container for other controls I drag into the custom control in designer. I can't seem to find any information on how to do this. I've extended UserControl and SetStyle containercontrol to true, but this doesn't work. I think I'll have to trap for drag/drop events, test to see if I'm in the design environment, cast the drag/drop object to a control and then stick it in the panel. I'm just hoping that there is an easier way.... > Hey, created a custom control that includes a panel. I want to use the > panel [quoted text clipped - 7 lines] > it > in the panel. I'm just hoping that there is an easier way.... Modify your control to inherit from ContainerControl rather than UserControl. This will allow it to automatically accept controls dropped into it. I don't know of any ways of controlling where sub-controls would exist within your container control. One approach might be to intercept ControlAdded events and move the controls into your Panel when a new control arrives. Needless to say you should only hook this up after you've added all your "internal" controls. You might need some other plumbing to keep the developer from getting the controls out of your Panel into the actual control. One downside of inheriting from ContainerControl is that you lose the funky UI for the UserControl. What I do is design my control the way I want it and then change the inheritance away from UserControl. Any time I want to make changes, I change it back. Aha! I knew there was an easier way! Losing the designer didn't matter, as it sucked anyhow. I had all my rendering in a user paint event, which didn't show up at all in the designer... > > Hey, created a custom control that includes a panel. I want to use the > > panel [quoted text clipped - 22 lines] > then change the inheritance away from UserControl. Any time I want to make > changes, I change it back. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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