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Old November 17th, 2010, 03:43 PM
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How do you code that "loading" or "waiting" graphic in WPF?

How do you code that "loading" or "waiting" graphic in WPF?

If someone had a page that requires loading a lot information, typically on a flash web site, you see a circle spinning of some sort that universally means that there is a lot of data that is being loaded and the user needs to wait.

This is more than just a nice effect. It has real world application and importance. If someone opens a form or page or window that does not have this graphic and instead sees a form that should have information displayed but instead sees blank fields, his first notiion might rightly be that there is no information to be seen. This could be true even if the cursor turns to a waiting mode. The vast fields of emptiness will be more present and overpowering of an image than a cursor that might be in some sort of spinning state.

I suppose I could throw something together. I suppose I could present a gif of a rotating circle that is shown at the beginning and then hidden once all the data loading methods have been called. But maybe there is some sort of shared common graphic to use for free and without knowing exactly what this thing is called, I do not know what name or phrase to use to search for one. What are they called?

Also, maybe there is something already build into WPF or WCF or even MVVM that uses this. Is there? Also, maybe someone has worked out a way to make the whole form or page gray and inactive while displaying a rotating circle and has been kind enough to share it. Is this true?

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