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IMapControlEvents2.OnOleDrop Event (ArcObjects .NET 10.5 SDK)
ArcObjects Help for .NET developers > ArcObjects namespaces > Controls > ESRI ArcGIS Controls > Interfaces > IM > IMapControlEvents2 Interface > IMapControlEvents2.OnOleDrop Event (ArcObjects .NET 10.5 SDK)
ArcObjects Library Reference (Controls)  

IMapControlEvents2.OnOleDrop Event

Fires when an OLE drop action occurs on the MapControl.

[Visual Basic .NET]
Public Event OnOleDrop As OnOleDropEventHandler

[C#]
public event OnOleDropEventHandler OnOleDrop

[C++]
HRESULT OnOleDrop(
  esriControlsDropAction dropAction,
  VARIANT dataObjectHelper,
  long* effect,
  long button,
  long shift,
  long X,
  long Y
);

[C++]

Parameters
dropAction [in]

  dropAction is a parameter of type esriControlsDropAction
dataObjectHelper [in]
  dataObjectHelper is a parameter of type VARIANT
effect [in, out]
  effect is a parameter of type long
button [in]
  button is a parameter of type long
shift [in]
  shift is a parameter of type long
X [in]
  X is a parameter of type long
Y [in]
  Y is a parameter of type long

Product Availability

Available with ArcGIS Engine.

Description

If the IMapControl2::OleDropEnabled property is set to False the OnOleDrop event will not be triggered, and the esriDragDropNone effect will display when data is dragged over the control.

If the IMapControl2::OleDropEnabled property is set to True the esriControlsDragDropEffect must be set each time the OnOleDrop event is triggered.

Use the esriControlsDropAction constant to determine whether the data is entering or leaving the control, or whether data is being dragged over or dropped onto the MapControl.

Remarks

Use the esriDropOver dropAction to display mouse coordinates while data is being dragged over the MapControl from another application, as the OnMouseMove event will not be triggered.

[C#] 
private void axMapControl1_OnOleDrop(object sender, ESRI.ArcGIS.MapControl.IMapControlEvents2_OnOleDropEvent e)
{
    switch (e.dropAction)
    {
        //Data entering the  
        case esriControlsDropAction.esriDropEnter:
            //Do something...
            break;
        //Data dragged over the MapControl
        case esriControlsDropAction.esriDropOver:
            label1.Text="x:" + e.x + "  y:" + e.y;
            label1.Refresh();
            break;
        //Data leaving the MapControl
        case esriControlsDropAction.esriDropLeave:
            //Do something...
            break;
        //Data dropped onto MapControl
        case esriControlsDropAction.esriDropped :
            //Do something...
            break;
    }

}
[Visual Basic .NET] 
Private Sub AxMapControl1_OnOleDrop(ByVal sender As Object, ByVal e As ESRI.ArcGIS.MapControl.IMapControlEvents2_OnOleDropEvent) Handles AxMapControl1.OnOleDrop
'Data entering the MapControl
   If e.dropAction=esriControlsDropAction.esriDropEnter Then
       'Do something...
   'Data dragged over the MapControl
   ElseIf e.dropAction=esriControlsDropAction.esriDropOver Then
       Label1.Text="x:" & e.x & "  y:" & e.y
       Label1.Refresh()
   'Data leaving the MapControl
   ElseIf e.dropAction=esriControlsDropAction.esriDropLeave Then
       'Do something...
   'Data dropped onto the MapControl
   ElseIf e.dropAction=esriControlsDropAction.esriDropped Then
       'Do something...
   End If
End Sub

See Also

IMapControlEvents2 Interface