Generic TreeNode problems

[John Faris]

Hi all.

I have a class that inherits from TreeNode and adds a generic property,
NodeObject. Then I have several other classes that inherit from this class
and specify the type of NodeObject as below:-

public class BaseNode<T: TreeNode
{
private T _nodeObject;
public T NodeObject
{
get
{
return _nodeObject;
}
set
{
_nodeObject = value;
}
}

}

public class SiteNode : BaseNode<SiteIn fo>
{
public SiteNode(SiteIn fo site)
{
NodeObject = site;
Text = site.SiteName;
ImageKey = "Site";
SelectedImageKe y = ImageKey;
}
}

public class DepartmentNode : BaseNode<Depart mentInfo>
{
public DepartmentNode( DepartmentInfo dept)
{
NodeObject = dept;
Text = dept.Department Name;
ImageKey = "Dept";
SelectedImageKe y = ImageKey;
}
}

This all works fine. However, I want to implement Drag and Drop of the
NodeObject data out of the TreeView. My question is how can I access the
NodeObject property generically to use in the DoDragDrop method? In the
TreeView's MouseMove event you can access the SelectedNode property, but
that is of type TreeNode. So I would need to cast this to say an interface
that exposed the NodeObject property but I cannot seem to figure out how to
do this.

I also tried using the ItemDrag event but that presents the same problem as
the data is passed as type object. I hope someone can understand my
rambling and offer some help.

TIA.