http://www.asp.net/ajax/ajaxcontroltoolkit/Samples/ModalPopup/ModalPopup.aspx[^] may be this is what you want

since you are dynamically adding control so the controls are not saved. try adding the controls when the page post back aging and it should work then

keep some hidden button in the page and call button1.click() or __dopostback("","") or this.form[0].submit()

try window.open function

you can do some thing like this

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
List<decimal> lstIntCol = new List<decimal>();
lstIntCol.Add(0.3M);
lstIntCol.Add(0.2M);
lstIntCol.Add(-0.3M);
lstIntCol.Sort(new decimalComparer());
foreach (decimal d in lstIntCol)
{
Response.Write(d.ToString() + "--");
}
}
}

public class decimalComparer : System.Collections.Generic.IComparer<decimal>
{

#region IComparer<decimal> Members

public int Compare(decimal x, decimal y)
{
    return decimal.Compare(Math.Abs(y),Math.Abs(x));
}

#endregion

}