This example demonstrates the forbidden zones feature allowing you to control a panel's ability to selectively dock to particular zones.
Using a dock panel's ForbiddenZones property, you can specify disallowed zones for the panel - the zones to which the panel cannot be docked. It is also possible to provide different appearances for the allowed and forbidden zone states by using a dock zone's Styles.DockingAllowedStyle and Styles.DockingForbiddenStyle properties. These appearances are used to highlight zones during panel dragging and to indicate whether a particular zone is allowed or disallowed for panel docking.
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You can open a local copy of this online demo directly from this webpage (if using v20.2.8, 21.1.4 or higher).
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\Users\Public\Documents\DevExpress Demos XX.X\Components\ASP.NET\CS\MVCxDockAndPopupsDemos |