diff --git a/src/myfasthtml/controls/DataGrid.py b/src/myfasthtml/controls/DataGrid.py
index 909e7ea..53aba86 100644
--- a/src/myfasthtml/controls/DataGrid.py
+++ b/src/myfasthtml/controls/DataGrid.py
@@ -1,9 +1,10 @@
 from typing import Optional
 
+from fastcore.basics import NotStr
 from fasthtml.components import Div
 
 from myfasthtml.controls.BaseCommands import BaseCommands
-from myfasthtml.controls.datagrid_objects import DataGridColumnState, DataGridRowState, DataGridFooterConf, \
+from myfasthtml.controls.datagrid_objects import DataGridColumnState, DataGridRowState, \
   DatagridSelectionState, DataGridHeaderFooterConf, DatagridEditionState
 from myfasthtml.core.dbmanager import DbObject
 from myfasthtml.core.instances import MultipleInstance
@@ -24,6 +25,7 @@ class DatagridState(DbObject):
       self.filtered: dict = {}
       self.edition: DatagridEditionState = DatagridEditionState()
       self.selection: DatagridSelectionState = DatagridSelectionState()
+      self.html = None
 
 
 class DatagridSettings(DbObject):
@@ -46,13 +48,17 @@ class Commands(BaseCommands):
 class DataGrid(MultipleInstance):
   def __init__(self, parent, settings=None, _id=None):
     super().__init__(parent, _id=_id)
-    self._settings = DatagridSettings(self).update(settings)
+    self._settings = DatagridSettings(self)
     self._state = DatagridState(self)
     self.commands = Commands(self)
   
+  def set_html(self, html):
+    self._state.html = html
+  
   def render(self):
     return Div(
-      self._id
+      NotStr(self._state.html),
+      id=self._id
     )
   
   def __ft__(self):
diff --git a/src/myfasthtml/controls/DataGridsManager.py b/src/myfasthtml/controls/DataGridsManager.py
index aada9f5..2f065e2 100644
--- a/src/myfasthtml/controls/DataGridsManager.py
+++ b/src/myfasthtml/controls/DataGridsManager.py
@@ -1,11 +1,12 @@
 from dataclasses import dataclass
 
 import pandas as pd
-from fastcore.basics import NotStr
 from fasthtml.components import Div
 
 from myfasthtml.controls.BaseCommands import BaseCommands
+from myfasthtml.controls.DataGrid import DataGrid
 from myfasthtml.controls.FileUpload import FileUpload
+from myfasthtml.controls.Panel import Panel
 from myfasthtml.controls.TabsManager import TabsManager
 from myfasthtml.controls.TreeView import TreeView, TreeNode
 from myfasthtml.controls.helpers import mk
@@ -76,8 +77,10 @@ class DataGridsManager(MultipleInstance):
   
   def open_from_excel(self, tab_id, file_upload: FileUpload):
     excel_content = file_upload.get_content()
-    df = pd.read_excel(excel_content)
-    content = df.to_html(index=False)
+    df = pd.read_excel(excel_content, file_upload.get_sheet_name())
+    html = df.to_html(index=False)
+    dg = DataGrid(self._tabs_manager)
+    dg.set_html(html)
     document = DocumentDefinition(
       namespace=file_upload.get_file_basename(),
       name=file_upload.get_sheet_name(),
@@ -89,7 +92,7 @@ class DataGridsManager(MultipleInstance):
     parent_id = self._tree.ensure_path(document.namespace)
     tree_node = TreeNode(label=document.name, type="excel", parent=parent_id)
     self._tree.add_node(tree_node, parent_id=parent_id)
-    return self._mk_tree(), self._tabs_manager.change_tab_content(tab_id, document.name, NotStr(content))
+    return self._mk_tree(), self._tabs_manager.change_tab_content(tab_id, document.name, Panel(self).set_main(dg))
   
   def clear_tree(self):
     self._state.elements = []
diff --git a/src/myfasthtml/controls/TabsManager.py b/src/myfasthtml/controls/TabsManager.py
index f7825d8..07a12f0 100644
--- a/src/myfasthtml/controls/TabsManager.py
+++ b/src/myfasthtml/controls/TabsManager.py
@@ -111,10 +111,10 @@ class TabsManager(MultipleInstance):
     if tab_id not in self._state.tabs:
       return Div("Tab not found.")
     tab_config = self._state.tabs[tab_id]
-    if tab_config["component_type"] is None:
+    if tab_config["component"] is None:
       return Div("Tab content does not support serialization.")
     try:
-      return InstancesManager.get(self._session, tab_config["component_id"])
+      return InstancesManager.get(self._session, tab_config["component"][1])
     except Exception as e:
       logger.error(f"Error while retrieving tab content: {e}")
       return Div("Failed to retrieve tab content.")
@@ -384,8 +384,7 @@ class TabsManager(MultipleInstance):
     
     if component_id is not None:
       for tab_id, tab_data in self._state.tabs.items():
-        if (tab_data.get('component_type') == component_type and
-            tab_data.get('component_id') == component_id and
+        if (tab_data.get('component') == (component_type, component_id) and
             tab_data.get('label') == label):
           return tab_id
     
@@ -399,16 +398,21 @@ class TabsManager(MultipleInstance):
     
     # Extract component ID if the component has a get_id() method
     component_type, component_id = None, None
+    parent_type, parent_id = None, None
     if isinstance(component, BaseInstance):
       component_type = component.get_prefix()
       component_id = component.get_id()
+      parent = component.get_parent()
+      if parent:
+        parent_type = parent.get_prefix()
+        parent_id = parent.get_id()
     
     # Add tab metadata to state
     state.tabs[tab_id] = {
         'id': tab_id,
         'label': label,
-        'component_type': component_type,
-        'component_id': component_id
+        'component': (component_type, component_id) if component_type else None,
+        'component_parent': (parent_type, parent_id) if parent_type else None
     }
     
     # Add tab to order list
diff --git a/src/myfasthtml/controls/TreeView.py b/src/myfasthtml/controls/TreeView.py
index fd93536..30f8926 100644
--- a/src/myfasthtml/controls/TreeView.py
+++ b/src/myfasthtml/controls/TreeView.py
@@ -37,6 +37,7 @@ class TreeNode:
   type: str = "default"
   parent: Optional[str] = None
   children: list[str] = field(default_factory=list)
+  bag: Optional[dict] = None # to keep extra info
 
 
 class TreeViewState(DbObject):
diff --git a/src/myfasthtml/core/dbmanager.py b/src/myfasthtml/core/dbmanager.py
index 97dd8ed..c4bdb00 100644
--- a/src/myfasthtml/core/dbmanager.py
+++ b/src/myfasthtml/core/dbmanager.py
@@ -98,6 +98,8 @@ class DbObject:
     properties = {}
     if args:
       arg = args[0]
+      if arg is None:
+        return self
       if not isinstance(arg, (dict, SimpleNamespace)):
         raise ValueError("Only dict or Expando are allowed as argument")
       properties |= vars(arg) if isinstance(arg, SimpleNamespace) else arg
diff --git a/tests/controls/test_tabsmanager.py b/tests/controls/test_tabsmanager.py
index c3599bc..0ec7cdc 100644
--- a/tests/controls/test_tabsmanager.py
+++ b/tests/controls/test_tabsmanager.py
@@ -51,8 +51,8 @@ class TestTabsManagerBehaviour:
     assert tab_id in tabs_manager.get_state().tabs
     assert tabs_manager.get_state().tabs[tab_id]["label"] == "Tab1"
     assert tabs_manager.get_state().tabs[tab_id]["id"] == tab_id
-    assert tabs_manager.get_state().tabs[tab_id]["component_type"] is None
-    assert tabs_manager.get_state().tabs[tab_id]["component_id"] is None
+    assert tabs_manager.get_state().tabs[tab_id]["component"] is None
+    assert tabs_manager.get_state().tabs[tab_id]["component_parent"] is None
     assert tabs_manager.get_state().tabs_order == [tab_id]
     assert tabs_manager.get_state().active_tab == tab_id
   
@@ -61,9 +61,12 @@ class TestTabsManagerBehaviour:
     vis_network = VisNetwork(tabs_manager, nodes=[], edges=[])
     tab_id = tabs_manager.create_tab("Network", vis_network)
     
+    component_type, component_id = vis_network.get_prefix(), vis_network.get_id()
+    parent_type, parent_id = tabs_manager.get_prefix(), tabs_manager.get_id()
+    
     assert tab_id is not None
-    assert tabs_manager.get_state().tabs[tab_id]["component_type"] == vis_network.get_prefix()
-    assert tabs_manager.get_state().tabs[tab_id]["component_id"] == vis_network.get_id()
+    assert tabs_manager.get_state().tabs[tab_id]["component"] == (component_type, component_id)
+    assert tabs_manager.get_state().tabs[tab_id]["component_parent"] == (parent_type, parent_id)
   
   def test_i_can_create_multiple_tabs(self, tabs_manager):
     """Test creating multiple tabs maintains correct order and activation."""