LayoutEditorPart Class

<%@ control language="C#" classname="DisplayModeMenuCS"%>
<script runat="server">

 // Use a field to reference the current WebPartManager.
  WebPartManager _manager;

  void Page_Init(object sender, EventArgs e)
  {
    Page.InitComplete += new EventHandler(InitComplete);
  }  

  void InitComplete(object sender, System.EventArgs e)
  {
    _manager = WebPartManager.GetCurrentWebPartManager(Page);

    String browseModeName = WebPartManager.BrowseDisplayMode.Name;

    // Fill the dropdown with the names of supported display modes.
    foreach (WebPartDisplayMode mode in _manager.SupportedDisplayModes)
    {
      String modeName = mode.Name;
      // Make sure a mode is enabled before adding it.
      if (mode.IsEnabled(_manager))
      {
        ListItem item = new ListItem(modeName, modeName);
        DisplayModeDropdown.Items.Add(item);
      }
    }

    // If shared scope is allowed for this user, display the scope-switching
    // UI and select the appropriate radio button for the current user scope.
    if (_manager.Personalization.CanEnterSharedScope)
    {
      Panel2.Visible = true;
      if (_manager.Personalization.Scope == PersonalizationScope.User)
        RadioButton1.Checked = true;
      else
        RadioButton2.Checked = true;
    }

  }

  // Change the page to the selected display mode.
  void DisplayModeDropdown_SelectedIndexChanged(object sender, EventArgs e)
  {
    String selectedMode = DisplayModeDropdown.SelectedValue;

    WebPartDisplayMode mode = _manager.SupportedDisplayModes[selectedMode];
    if (mode != null)
      _manager.DisplayMode = mode;
  }

  // Set the selected item equal to the current display mode.
  void Page_PreRender(object sender, EventArgs e)
  {
    ListItemCollection items = DisplayModeDropdown.Items;
    int selectedIndex = 
      items.IndexOf(items.FindByText(_manager.DisplayMode.Name));
    DisplayModeDropdown.SelectedIndex = selectedIndex;
  }

  // Reset all of a user's personalization data for the page.
  protected void LinkButton1_Click(object sender, EventArgs e)
  {
    _manager.Personalization.ResetPersonalizationState();
  }

  // If not in User personalization scope, toggle into it.
  protected void RadioButton1_CheckedChanged(object sender, EventArgs e)
  {
    if (_manager.Personalization.Scope == PersonalizationScope.Shared)
      _manager.Personalization.ToggleScope();
  }

  // If not in Shared scope, and if user is allowed, toggle the scope.
  protected void RadioButton2_CheckedChanged(object sender, EventArgs e)
  {
    if (_manager.Personalization.CanEnterSharedScope && 
        _manager.Personalization.Scope == PersonalizationScope.User)
      _manager.Personalization.ToggleScope();
  }
</script>
<div>
  <asp:Panel ID="Panel1" runat="server" 
    Borderwidth="1" 
    Width="230" 
    BackColor="lightgray"
    Font-Names="Verdana, Arial, Sans Serif" >
    <asp:Label ID="Label1" runat="server" 
      Text="&nbsp;Display Mode" 
      Font-Bold="true"
      Font-Size="8"
      Width="120" 
      AssociatedControlID="DisplayModeDropdown"/>
    <asp:DropDownList ID="DisplayModeDropdown" runat="server"  
      AutoPostBack="true" 
      Width="120"
      OnSelectedIndexChanged="DisplayModeDropdown_SelectedIndexChanged" />
    <asp:LinkButton ID="LinkButton1" runat="server"
      Text="Reset User State" 
      ToolTip="Reset the current user's personalization data for the page."
      Font-Size="8" 
      OnClick="LinkButton1_Click" />
    <asp:Panel ID="Panel2" runat="server" 
      GroupingText="Personalization Scope"
      Font-Bold="true"
      Font-Size="8" 
      Visible="false" >
      <asp:RadioButton ID="RadioButton1" runat="server" 
        Text="User" 
        AutoPostBack="true"
        GroupName="Scope" OnCheckedChanged="RadioButton1_CheckedChanged" />
      <asp:RadioButton ID="RadioButton2" runat="server" 
        Text="Shared" 
        AutoPostBack="true"
        GroupName="Scope" 
        OnCheckedChanged="RadioButton2_CheckedChanged" />
    </asp:Panel>
  </asp:Panel>
</div>

<%@ Page Language="C#" %>
<%@ Register Src="~/displayModeMenuCS.ascx" 
  TagPrefix="uc1" 
  TagName="DisplayModeMenuCS" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  protected void Page_Load(object sender, EventArgs e)
  {
    Button1.Visible = false;
    TextBox1.Visible = false;
    BulletedList1.DataBind();
  }

  protected void Button1_Click(object sender, EventArgs e)
  {
    LayoutEditorPart1.Title = Server.HtmlEncode(TextBox1.Text);
  }

  protected void  LayoutEditorPart1_PreRender(object sender, EventArgs e)
  {
    Button1.Visible = true;
    TextBox1.Visible = true;
  }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
  <form id="form1" runat="server">
    <!-- This example uses Microsoft SQL Server and connects    -->
    <!-- to the Pubs sample database. Use an ASP.NET expression -->
    <!-- like the one in the following control to retrieve the  -->
    <!-- connection string value from the Web.config file.      -->
    <asp:SqlDataSource ID="ds1" runat="server" 
      connectionString="<%$ ConnectionStrings:PubsConnection %>" 
      SelectCommand="Select au_id, au_lname, au_fname From Authors"/>
    <asp:WebPartManager ID="WebPartManager1" runat="server" />
    <uc1:DisplayModeMenuCS id="menu1" runat="server" />
    <asp:WebPartZone ID="WebPartZone1" runat="server" Width="150" 
      style="z-index: 100; left: 10px; position: absolute; top: 90px" >
      <ZoneTemplate>
        <asp:Panel ID="panel1" runat="server" Title="Author List WebPart">
          <asp:Label ID="Label1" runat="server" 
            Text="Author Names" 
            Font-Bold="true" 
            Font-Size="120%"
            AssociatedControlID="BulletedList1"/>
          <asp:BulletedList ID="BulletedList1" runat="server" 
            DataSourceID="ds1" 
            DataTextField="au_lname" 
            DataValueField="au_id"/>
        </asp:Panel>
      </ZoneTemplate>
    </asp:WebPartZone>
    <asp:WebPartZone ID="WebPartZone2" runat="server" Width="150" 
      style="z-index: 101; left: 170px; position: absolute; top: 90px" />
    <asp:EditorZone ID="EditorZone1" runat="server" 
      style="z-index: 102; left: 340px; position: absolute; top: 90px" 
      Width="170px">
      <ZoneTemplate>
        <asp:LayoutEditorPart ID="LayoutEditorPart1" runat="server" 
          Title="My Layout Editor" OnPreRender="LayoutEditorPart1_PreRender" />
      </ZoneTemplate>
    </asp:EditorZone>
    <asp:Button ID="Button1" runat="server" Width="140" 
      Text="Update EditorPart Title" 
      style="left: 340px; position: absolute; top: 65px; z-index: 103;" 
      OnClick="Button1_Click" />
    <asp:TextBox ID="TextBox1" runat="server" 
      style="z-index: 105; left: 500px; position: absolute; top: 65px" />
  </form>
</body>
</html>