jquery check val is empty

if($('#person_data[document_type]').val() != ''){}

scriptmanager does not exist in the current context

add using System.Web.UI;

Common Session methods Use By Creating separate class

 //added by shekhar 13/6/2014 To Clear Current Session
        public void ClearSession()
        {
            HttpContext.Current.Session.Clear();
        }
        //End Of Clear Session
        //added by shekhar 13/6/2014 To Remove item in session
        public void RemoveFromSession(string key)
        {
            HttpContext.Current.Session.Remove(key);
        }
        //end Of remove  

        public void SetInSession(string key, object value)
        {
            if (HttpContext.Current == null || HttpContext.Current.Session == null)
            {
                return;
            }
            HttpContext.Current.Session[key] = value;
        }

        public object GetFromSession(string key)
        {
            if (HttpContext.Current == null || HttpContext.Current.Session == null)
            {
                return null;
            }
            return HttpContext.Current.Session[key];
        }

        public void UpdateInSession(string key, object value)
        {
            HttpContext.Current.Session[key] = value;
        }

use httpcontext and server mappath in a c# class library

1) add using System.Web;

2)string  filePath = HttpContext.Current.Server.MapPath("~/TextFiles/StylePath.txt");

Access asp.net session value in javascript

 var Guest = '<%=HttpContext.Current.Session["Advisorguest"]%>';

Common Logic For Getting Single Value From Database Asp.Net

1)  string[,] param1 = new string[1, 2];
                param1[0, 0] = "@userName";
                param1[0, 1] = username;

2) string status = CommonClass.Common.Instance.getSingleValue("checkIsExistUserName", param1);

3)  SqlConnection myConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["ValweaveFa"].ConnectionString);
        SqlCommand sm;
public string getSingleValue(string procNm, string[,] paramVal)
        {
            try
            {
                myConnection.Open();
                sm = new SqlCommand(procNm, myConnection);
                sm.CommandType = CommandType.StoredProcedure;

                for (int i = 0; i < paramVal.Length / 2; i++)
                {
                    if ((paramVal[i, 0] != null) && (paramVal[i, 1] != null))
                        sm.Parameters.Add(paramVal[i, 0], paramVal[i, 1]);
                }
                string Password = Convert.ToString(sm.ExecuteScalar());
                myConnection.Close();
                return Password;

            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

Create Task with Task Scheduler in windows

http://www.sevenforums.com/tutorials/12444-task-scheduler-create-new-task.html