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

using System.Data;
using System.Configuration;
using System.Web.Security;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Telerik.Web.UI;

public partial class Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            Session["RSession"] = new RSession.UserSession();
            RadTabStrip_Populating();
        }
    }

    protected void RadTabStrip_Populating()
    {
        string[] tabValues = { "String|A M A|ApplePumpkinButter|MyChoices", "Decimal|Base Happy Go Lucky turtle|BaseHappyGoLuckyturtle|MyHappyFunDay", "Decimal|Base Mountain Slopes|BaseMountainSlopes|MyFunWithTabs", "Decimal|Base Ski Slopes|BaseSkiSlopes|MyFunWithTabs", "Decimal|BaseSkiSlopeAdjustedHight|BaseSkiSlopeAdjustedHight|MoreFunWithTabs" };
        foreach (string tv in tabValues)
        {
            RadTab RT = new RadTab();
            RT.Text = tv.Split('|')[1];
            RT.Value = tv;
            RT.Width = Unit.Pixel(300);
            RadTabStrip1.Tabs.Add(RT);
        }
    }

    protected void RadMultiPage1_PageViewCreated(object sender, RadMultiPageEventArgs e)
    {
        string userControlName = "dynamicbuilder.ascx";

        Control userControl = Page.LoadControl(userControlName);
        userControl.ID = e.PageView.ID.Replace(" ", "").Replace("|", "") + "_userControl";

        e.PageView.Controls.Add(userControl);
    }

    private void AddPageView(RadTab tab)
    {
        RadPageView pageView = new RadPageView();
        pageView.ID = tab.Text.Replace(" ", "");
        RadMultiPage1.PageViews.Add(pageView);
        tab.PageViewID = pageView.ID;
    }

    protected void RadTabStrip1_TabClick(object sender, RadTabStripEventArgs e)
    {
        ((RSession.UserSession)Session["RSession"]).CurrentParameterDT = e.Tab.Value.ToString().Split('|')[0].ToString();
        ((RSession.UserSession)Session["RSession"]).CurrentParameterFLH = e.Tab.Value.ToString().Split('|')[1].ToString();
        ((RSession.UserSession)Session["RSession"]).CurrentParameterFName = e.Tab.Value.ToString().Split('|')[2].ToString();
        ((RSession.UserSession)Session["RSession"]).CurrentParameterTName = e.Tab.Value.ToString().Split('|')[3].ToString();
        AddPageView(e.Tab);
        e.Tab.PageView.Selected = true;
    }
}

<telerik:GridNumericColumn DataField="TestDecimalField" HeaderStyle-Width="80px" HeaderText="Columna decimal" SortExpression="TestDecimalField" UniqueName="TestDecimalField" DataType="System.Decimal" DataFormatString="{0:###,##0.00}" FilterControlWidth="50px"></telerik:GridNumericColumn>