private void build( TreeNodeCollection from , TreeNodeCollection to , TreeNode parent )
{
TreeNodeCollection childNodes = from.SearchByParentId( parent.Id ) ;
foreach( TreeNode n in childNodes )
{
to.Add(n);
this.build( from , n.ChildNodes , n ) ;
}
}
private TreeNodeCollection GetRootNodes( TreeNodeCollection nodes )
{
TreeNodeCollection tempnodes = new TreeNodeCollection ();
foreach( TreeNode n in nodes )
{
if( nodes.ExistByParentId( n.Id ) )
tempnodes.Add(n);
}
return tempnodes ;
}
public void BuildNodes( TreeNodeCollection nodes , System.Collections.IEnumerable list )
{
TreeNodeCollection tempnodes = new TreeNodeCollection ();
System.Collections.IEnumerator lt = list.GetEnumerator();
while( lt.MoveNext() )
{
object o = lt.Current ;
tempnodes.Add( _c.ToTreeNode( o ) );
}
TreeNodeCollection roots = this.GetRootNodes( tempnodes ) ;
foreach( TreeNode n in roots )
{
nodes.Add( n );
this.build( tempnodes , n.ChildNodes , n ) ;
}
}
public TreeNodeCollection SearchByParentId( string parentId )
{
TreeNodeCollection nodes = new TreeNodeCollection ();
foreach( TreeNode n in this )
{
if( n.ParentId == parentId )
nodes.Add( n ) ;
}
return nodes ;
}
public bool ExistByParentId( string pid )
{
TreeNodeCollection nodes = new TreeNodeCollection ();
foreach( TreeNode n in this )
{
if( n.ParentId == pid )
return true ;
}
return false ;
}
