Custom Rollover Image Control

[Memnoch1207]

I'm creating a custom rollover image control, which inherits from WebControl. Everything works great except when I initially drop the control on the page and set the BaseImage property, it doesn't fill in the imagebox with the image I have specified.

If you drop a .NET Image control on a page, initially the image doesn't appear, until you set the ImageUrl property, then the image appears.

How can I refresh the control in the IDE to show the image that was set? Basically, duplicate the functionality of having the image appear when the property is set.

[Memnoch1207]

hmmm....okay...
Does anyone know how to refresh or repaint or rerender a control in the IDE after a property has changed?

I have seen for windows forms that you can call the Invalidate method within the property to have it repaint the control, but that method doesn't exist in ASP.NET.

[Magiaus]

If so look at the ControlDesigner's RaiseComponentChanged and RaiseComponentChanging members. Also, check out GetDesignTimeHtml, GetErrorDesignTimeHtml, and GetEmptyDesignTimeHtml.

I don't have a good working example to post. Sorry.

[Magiaus]

Be sure to use some sort of javescript image cache or you'll get a nasty lag effect. I have an ImageList for ASP.Net but I haven't finished the designer yet. It's nice I have an interface that add ImageList To a WebControl and the list is basicly a strong typed collection. It renders a javascript image array i.e. imgs[x] - new Image('path'); the Collection just maps the exact same index and .... blah..blah.. not done...