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DataObjectHelper Class (ArcObjects .NET 10.8 SDK)
ArcObjects Help for .NET developers > ArcObjects Help for .NET developers > ArcObjects namespaces > SystemUI > ESRI.ArcGIS.SystemUI > Classes > D > DataObjectHelper Class
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DataObjectHelperClass Class

Helper class for OLE drag and drop.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.


Provides helper methods and properties for retrieving data from an IDataObject interface. IDataObject is a windows standard interface used for dragging and droping data. This is available directly through the InternalObject property.

Supported Platforms

Windows, Solaris, Linux

Extended Error Information

Use the ISupportErrorInfo method InterfaceSupportsErrorInfo to determine if the object supports extended error information. If the object supports extended error info, VC++ developers should use the OLE/COM IErrorInfo interface to access the ErrorInfo object. Visual Basic developers should use the global error object Err to retrieve this extended error information.


Interfaces Description
IDataObjectHelper Provides access to members for OLE drag and drop.
ISupportErrorInfo (esriSystem)


The DataObjectHelper can be used by the MapControl and PageLayoutControl to control drag-and-drop operations.

The NameFactory class (defined in esriSystem) performs a similar job for Name objects with non-ESRI controls, though the DataObjectHelper handles drag-and-drop for both Name objects and file names.