private double ConvertToDouble(string v)
{
double d = 0;
if (v == "") return d;
string vs = "";
vs = v.Replace(System.Threading.Thread.CurrentThread.CurrentCulture.NumberFormat.NumberGroupSeparator, System.Threading.Thread.CurrentThread.CurrentCulture.NumberFormat.NumberDecimalSeparator);
Double.TryParse(vs, out d);
return d;
}