[DefaultValue(-1)]
[Category("Behavior")]
[ExtenderControlProperty]
[ClientPropertyName("activeTabIndex")]
public virtual int ActiveTabIndex
{
    get
    {
        if (_cachedActiveTabIndex > -1)
        {
            return _cachedActiveTabIndex;
        }
        if (Tabs.Count == 0)
        {
            return -1;
        }
        return _activeTabIndex;
    }
    set
    {
        if (value < -1)
           throw new ArgumentOutOfRangeException("value");
        if (Tabs.Count == 0 && !_initialized)
        {
            _cachedActiveTabIndex = value;
        }
        else
        {
            if (ActiveTabIndex != value)
            {
                if (ActiveTabIndex != -1 
                    && ActiveTabIndex < Tabs.Count)
                {
                    Tabs[ActiveTabIndex].Active = false;
                }
                if (value >= Tabs.Count)
                {
                    _activeTabIndex = Tabs.Count-1;
                    _cachedActiveTabIndex = value;
                }
                else
                {
                    _activeTabIndex = value;
                    _cachedActiveTabIndex = -1;
                }
                if (ActiveTabIndex != -1 
                   && ActiveTabIndex < Tabs.Count)
                {
                    Tabs[ActiveTabIndex].Active = true;
                }
            }
        }
    }
}

set_activeTabIndex : function(value) {
    if (!this.get_isInitialized()) {
        this._cachedActiveTabIndex = value;
    } else {
        if (this._activeTabIndex != -1) {
            this.get_tabs()[this._activeTabIndex]._set_active(false);
        }
        if (value < -1 || value >= this.get_tabs().length) {
            this._activeTabIndex = this.get_tabs().length-1;
            this._cachedActiveTabIndex=value;
        } else {
            this._activeTabIndex = value;
            this._cachedActiveTabIndex=-1;
        }
        if (this._activeTabIndex != -1) {
            this.get_tabs()[this._activeTabIndex]._set_active(true);
        }
        if (this._loaded) {
            this.raiseActiveTabChanged();
        }
        this.raisePropertyChanged("activeTabIndex");
    }
},

• Starts with a TabContainer with single TabPanel defined in the aspx
• Has a button that adds new tabs to the TabContainer dynamically on the Click event
• The panels have buttons in them that can be clicked
• The active tab must be preserved during postbacks
• The page must work both on synchronous and asynchronous postbacks

using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using AjaxControlToolkit;

public partial class _Default : Page
{
    private int? _tabCount;

    /// <summary>
    /// Keep in ViewState the number of dynamically added tabs
    /// </summary>
    public int TabCount
    {
        get
        {
            if (_tabCount == null)
            {
                if (ViewState["TabCount"] == null)
                    TabCount = 0;
                else
                    TabCount = (int) ViewState["TabCount"];
            }
            return _tabCount.Value;
        }
        set
        {
            _tabCount = value;
            ViewState["TabCount"] = value;
        }
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        InitTabs();
    }

    /// <summary>
    /// Add the dynamical tabs after each postback
    /// </summary>
    private void InitTabs()
    {
        for (int c = 0; c < TabCount; c++)
            AddPanel();
    }

    /// <summary>
    /// Dynamically add a panel to the TabContainer
    /// </summary>
    private void AddPanel()
    {
        TabPanel tp = new TabPanel();
        tp.HeaderText = "Test Dinamic";
        TextBox tb = new TextBox();
        Button btn = new Button();
        btn.Text = "Click me!";
        tp.Controls.Add(btn);
        tp.Controls.Add(tb);
        TabContainer1.Tabs.Add(tp);
    }

    /// <summary>
    /// Click event to add a new panel 
    /// and update the TabCount property
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnAddPanel_Click(object sender, EventArgs e)
    {
        AddPanel();
        // do this if you didn't have any staticly defined
        // tabs or else the dynamic tabs will be invisible
        If (TabCount==0) TabContainer1.ActiveTabIndex=0;
        TabCount++;
    }
}

• For example you want to add an SQL Connection to Visual Studio 2005 and you get a "Unable to add data connection. Key not valid for use in specified state." error. The fix is to delete all not working sql connections that are already defined.
• Or you cannot step into a stored procedure from ASP.NET code on Windows Server 2003 in which case you need to run the WWW service in IIS 5.0 isolation mode.

• You cannot "break" execution.
• You cannot "edit and continue."
• You cannot change the order of statement execution.
• Although you can change the value of variables, your changes may not take effect because the variable values are cached.
• Output from the SQL PRINT statement is not displayed

I've first noticed her while she was playing with Sneaker Pimps, making the soundtrack for The Saint (Val Kilmer version). She looked so interesting with her vibrato voice, weird teeth and Asian features. I've even downloaded the whole Sneaker Pimps discografy before I found out that she was with Sneaker Pimps only briefly.

Now I was listening to the remix version of Linkin Park's My December featuring Kelli Ali and I recognized the voice immediately, even if she was singing faintly in the background. So I thought I would share her with you. Below is the video I think makes her look best, even if you can find a lot of videos with her playing live either as herself , either with TigerMouth or with Japanese bands Buck-Tick or Dropz. Also some links to her site and the Wikipedia entry.

SNEAKER PIMPS - 6 UNDERGROUND

[youtube:2eBZqmL8ehg]

Official web site with texts written by Kelli herself
Main Myspace site
Another MySpace site
Wikipedia entry