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Web parts - Can't get all the display modes

Posted By:      Posted Date: October 16, 2010    Points: 0   Category :ASP.Net


I am studying for the 70-562 examination and I came to the web part section.

I was trying to do the exercises presented in the Microsoft's book for this examination, but there is a part where I have to gather all the Display

Modes in a combobox. In my case, I can only see the "Browse" mode, I can't get the others.

I have this code in the code behind to populate the combobox

WebPartManager _manager = WebPartManager.GetCurrentWebPartManager(Page);
            foreach (WebPartDisplayMode mode in _manager.SupportedDisplayModes)
                if (mode.IsEnabled(_manager))
                    ListItem item = new ListItem(mode.Name, mode.Name);

But the only enabled mode is "browse".

What could be the reason for this? How could I fix it?

thank you,

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