GetRequiresData Method
The GetRequiresData method of the WebPart class is the virtual method that is called by the Web Part infrastructure when the System.Web.UI.Control.PreRender event occurs to indicate that a Web Part requires data.
Return Value
true if the Web Part requires data; otherwise false.
Remarks
The GetRequiresData method is used in conjunction with the GetData method. A connectable Web Part that requires data should override the GetRequiresData method. This method should return true until the Web Part has finished with all of its data requests. The Web Part should continue to return true even if it is not currently in a position to make a request. For example, if it is waiting on data from an interface from Microsoft.SharePoint.WebPartPages.Communications namespace such as the IFilter interface.
Requirements
Platforms: Microsoft Windows Server 2003
Security: Code Access Security