public override System.Collections.IEnumerable GetChildren(TreePath treePath)
{
List<DataRowNode> items = new List<DataRowNode>();
if (treePath.IsEmpty() )
{
items.Add(m_root);
}
else
{
DataRowNode n = treePath.LastNode as DataRowNode;
DataRow row = n.Row;
int id = Convert.ToInt32(row[m_IDColumnName]);
DataRow[] rows = m_table.Select("ParentID = " + id+" and "+m_IDColumnName+" <> "+id);
foreach (DataRow r in rows)
{
DataRowNode node = new DataRowNode(r,r["Name"].ToString());
node.Row = r;
//SampleApp.Properties.Resources.ResourceManager.
//node.Icon = new Bitmap(SampleApp.Properties.Resources.Records,new Size(15,15));
items.Add(node);
}
}
return items;
}
public override System.Collections.IEnumerable GetChildren(TreePath treePath)
{
List <DataRowNode> items = new List <DataRowNode>();
if (treePath.IsEmpty())
{
items.Add(m_root);
}
else
{
DataRowNode n = treePath.LastNode as DataRowNode;
DataRow row = n.Row;
int id = Convert.ToInt32(row[m_IDColumnName]);
DataRow[] rows = m_table.Select("ParentID = " + id + " and " + m_IDColumnName + " <> " + id);
foreach (DataRow r in rows)
{
DataRowNode node = new DataRowNode(r, r["Name"].ToString());
node.Row = r;
//SampleApp.Properties.Resources.ResourceManager.
//node.Icon = new Bitmap(SampleApp.Properties.Resources.Records,new Size(15,15));
items.Add(node);
}
}
return(items);
}
public override bool IsLeaf(TreePath treePath)
{
DataRowNode n = treePath.LastNode as DataRowNode;
if (n.Row["IsFolder"] == DBNull.Value)
{
return(false);
}
return(!Convert.ToBoolean(n.Row["IsFolder"]));
}
public DataTableTreeModel(DataTable table, string idColumnName)
{
m_table = table;
m_IDColumnName = idColumnName;
DataRow[] rows = table.Select(m_IDColumnName+" = ParentID");
if( rows.Length ==0 )
{
throw new Exception("DataTableModel Requires a root Node");
}
m_root = new DataRowNode(rows[0],rows[0]["Name"].ToString());
m_root.Row = rows[0];
}
public DataTableTreeModel(DataTable table, string idColumnName)
{
m_table = table;
m_IDColumnName = idColumnName;
DataRow[] rows = table.Select(m_IDColumnName + " = ParentID");
if (rows.Length == 0)
{
throw new Exception("DataTableModel Requires a root Node");
}
m_root = new DataRowNode(rows[0], rows[0]["Name"].ToString());
m_root.Row = rows[0];
}
//public event EventHandler<TreeModelEventArgs> NodesChanged;
//public event EventHandler<TreeModelEventArgs> NodesInserted;
//public event EventHandler<TreeModelEventArgs> NodesRemoved;
//public event EventHandler<TreePathEventArgs> StructureChanged;
public void AddChild(TreePath parent, string text)
{
DataRowNode n = parent.LastNode as DataRowNode;
DataRow r = m_table.NewRow();
r["ID"] = GetNextID();
r["ParentID"] = n.Row["ID"];
r["IsFolder"] = false;
r["Name"] = text;
r["Tag"] = "";
m_table.Rows.Add(r);
DataRowNode child = new DataRowNode(r, text);
OnStructureChanged(new TreePathEventArgs(parent));
}
//public event EventHandler<TreeModelEventArgs> NodesChanged;
//public event EventHandler<TreeModelEventArgs> NodesInserted;
//public event EventHandler<TreeModelEventArgs> NodesRemoved;
//public event EventHandler<TreePathEventArgs> StructureChanged;
public void AddChild(TreePath parent, string text)
{
DataRowNode n = parent.LastNode as DataRowNode;
DataRow r = m_table.NewRow();
r["ID"] = GetNextID();
r["ParentID"] = n.Row["ID"];
r["IsFolder"] = false;
r["Name"] = text;
r["Tag"] = "";
m_table.Rows.Add(r);
DataRowNode child = new DataRowNode(r, text);
OnStructureChanged(new TreePathEventArgs(parent));
}
private void addNode_Click(object sender,
EventArgs e)
{
if (treeViewAdv1.SelectedNode != null)
{
DataRowNode n = treeViewAdv1.SelectedNode.Tag as DataRowNode;
if (!Convert.ToBoolean(n.Row["IsFolder"]))
{
return;
}
TreePath parent = treeViewAdv1.GetPath(treeViewAdv1.SelectedNode);
m_dataTableModel.AddChild(parent, "Hi " + DateTime.Today.ToShortDateString());
}
}
