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WebPartManager.WebPartsConnecting Event

Occurs during the process of creating a connection between WebPart controls (or server or user controls placed in a WebPartZoneBase zone).

Namespace:  System.Web.UI.WebControls.WebParts
Assembly:  System.Web (in System.Web.dll)

member WebPartsConnecting : IEvent<WebPartConnectionsCancelEventHandler,
    WebPartConnectionsCancelEventArgs>

The WebPartsConnecting event is raised by the OnWebPartsConnecting method, and it signals that the connection process has begun (for example, a user has selected a control and clicked a connect verb), but is not yet completed. The event provides an opportunity to cancel a connection before it is complete. If the connection is successfully completed, this event is followed by the WebPartsConnected event.

Page developers can add a custom handler for the event by adding the OnWebPartsConnecting attribute to the <asp:webpartmanager> element, and assigning a custom method name to the attribute.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
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