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HttpContext.Current.Session is null in class MyDbSchedulerProvider

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Scheduler

This is a migrated thread and some comments may be shown as answers.

Khi asked on 26 Jan 2011, 11:01 AM

I'm using The Q3 2010 Scheduler control with a Web Service data source, in class MyDbSchedulerProvider
public override IEnumerable<Appointment> GetAppointments(RadScheduler owner)
{
      User objUser = (User)HttpContext.Current.Session["User"];
}

in function GetAppointments i'm use object HttpContext.Current.Session, Minor run all good when !isPosback, but when my execute event Update then HttpContext.Current.Session is null.
please help me.
thanks!

using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Data.SqlClient;
using Telerik.Web.UI;
using WebLibs;
using System.Data;
using EWorking.Scheduler;
using EWorking.CRM;
using HRMS.Utility;
using System.Web;
using System.Web.Services;
using System.Web.SessionState;

namespace EWorking.Scheduler
{
    public class MyDbSchedulerProvider : DbSchedulerProviderBase
    {
        private string strUsername = string.Empty;

        public string Username
        {
            get { return strUsername; }
            set { strUsername = value; }
        }

        private IDictionary<int, Resource> _teachers;
        private IDictionary<int, Resource> _students;

        private IDictionary<int, Resource> Teachers
        {
            get
            {
                if (_teachers == null)
                {
                    _teachers = new Dictionary<int, Resource>();
                    foreach (Resource teacher in LoadTeachers())
                    {
                        _teachers.Add((int)teacher.Key, teacher);
                    }
                }

                return _teachers;
            }
        }

        private IDictionary<int, Resource> Students
        {
            get
            {
                _students = new Dictionary<int, Resource>();
                foreach (Resource student in LoadStudents())
                {
                    _students.Add((int)student.Key, student);
                }

                return _students;
            }
        }

        public MyDbSchedulerProvider()
        {
        }

        public MyDbSchedulerProvider(string strUser)
        {
            Username = strUser;
        }

        public override IEnumerable<Appointment> GetAppointments(RadScheduler owner)
        {
            List<Appointment> appointments = new List<Appointment>();
            IData objData = new IData();
            try
            {
                objData.Connect();
                SCHAppointment objApp = new SCHAppointment();
                objApp.DataObject = objData;
                int intStatus = 1;
                if (HttpContext.Current.Session["MD_Scheduler_Status"] != null)
                    intStatus = Convert.ToInt16(HttpContext.Current.Session["MD_Scheduler_Status"]);
                IDataReader objReader = objApp.GetList(Username, intStatus, "");
                owner.Culture = ResxManager.CurrentCultureInfo;
                using (IDataReader reader = objReader)
                {
                    while (reader.Read())
                    {
                        Appointment apt = owner.CreateAppointment();
                        apt.Owner = owner;
                        apt.ID = reader["AppID"];
                        apt.Subject = Convert.ToString(reader["Subject"]);
                        apt.Start = DateTime.SpecifyKind(Convert.ToDateTime(reader["Start"]), DateTimeKind.Utc);
                        apt.End = DateTime.SpecifyKind(Convert.ToDateTime(reader["End"]), DateTimeKind.Utc);
                        apt.RecurrenceRule = Convert.ToString(reader["RecurrenceRule"]);
                        apt.RecurrenceParentID = reader["RecurrenceParentId"] == DBNull.Value ? null : reader["RecurrenceParentId"];

                        if (apt.RecurrenceParentID != null)
                        {
                            apt.RecurrenceState = RecurrenceState.Exception;
                        }
                        else
                            if (apt.RecurrenceRule != string.Empty)
                            {
                                apt.RecurrenceState = RecurrenceState.Master;
                            }
                        //apt.BackColor = System.Drawing.Color.Red;
                        //apt.BorderColor = System.Drawing.Color.Blue;

                        //apt.ForeColor = System.Drawing.Color.Red;
                        //apt.Owner.Height = System.Web.UI.WebControls.Unit.Pixel(100);

                        //LoadResources(apt);
                        appointments.Add(apt);
                    }
                }
            }
            catch
            {
            }
            finally
            {
                objData.DeConnect();
            }
            return appointments;
        }

        public void UpdateFull(int intAppID, string strSubject, DateTime dtmStart, DateTime dtmEnd, string strRecurrenceRule, int intRecurrenceParentID, bool bolShareAll, string strPlace, int intProcess, int intPriority, int intType, bool bolGroup, string strOwnerUsername, string strObjectName, int intAccountID, string strLstContact, int intEntityID, int intOwner, bool bolExistCRM, string strUserShare, int intMaxUserShare)
        {
            string str = Username;
            MySchedulerInfo objS = new MySchedulerInfo();

            IDbTransaction objTran = null;
            IData objData = new IData();
            SCHAppointment objMain = new SCHAppointment();
            try
            {

                objData.Connect();
                WebLibs.User objUser = (WebLibs.User)HttpContext.Current.Session["User"];
                objMain.AppID = intAppID;
                if (objMain.LoadByPrimaryKeys())
                {
                    objMain.Subject = strSubject;
                    objMain.Start = dtmStart;
                    objMain.End = dtmEnd;
                    objMain.RecurrenceRule = strRecurrenceRule;
                    objMain.RecurrenceParentID = intRecurrenceParentID;

                    objTran = objData.GetConnection().BeginTransaction();
                    objData.Transaction = objTran;
                    objMain.DataObject = objData;
                    objMain.Username = objUser.strUsername;
                    objMain.IsShareAll = bolShareAll;
                    objMain.UserShare = strUserShare;
                    objMain.MaxUsesrShare = intMaxUserShare;
                    objMain.Place = strPlace;
                    if (intProcess > 0)
                        objMain.ProgressID = intProcess;

                    objMain.PriorityID = intPriority;
                    objMain.AppType = intType;
                    if (bolExistCRM && intEntityID > 0)
                    {
                        CRMENTITIES objEntity = new CRMENTITIES();
                        objEntity.DataObject = objData;
                        objEntity.CREATEDUSER = objUser.strUsername;
                        if (!bolGroup)
                        {
                            GlobalFunction objFun = new GlobalFunction();
                            if (strOwnerUsername != "")
                                objEntity.OWNERID = Convert.ToInt32(objFun.GetUserInfo(strOwnerUsername).Rows[0]["UserID"]);
                        }
                        else
                            if (intOwner > 0)
                                objEntity.OWNERID = intOwner;

                        objEntity.MODULEID = CRMENTITIES.Activity;
                        objMain.EntityID = Convert.ToInt32(objEntity.Insert());
                        CRMRELATEDLIST objRELATEDLIST = new CRMRELATEDLIST();
                        objRELATEDLIST.DataObject = objData;
                        if (strObjectName != "")
                        {
                            objMain.RELATEDENTITYID = intAccountID;
                            objMain.RELATEDENTITYNAME = strObjectName;
                        }
                        string[] arrContact = strLstContact.Split(',');
                        for (int i = 0; i < arrContact.Length; i++)
                        {
                            objRELATEDLIST.ENTITYID = objMain.EntityID;
                            objRELATEDLIST.RELATEDENTITYID = Convert.ToInt32(arrContact[i]);
                            objRELATEDLIST.Insert();
                        }
                        objRELATEDLIST.ENTITYID = objMain.EntityID;
                        objRELATEDLIST.RELATEDENTITYID = intEntityID;
                        objRELATEDLIST.Insert();
                    }
                    objMain.Update();
                    if (!AddGuest(intAppID, objData, objMain.IsShareAll, objMain.UserShare, objMain.MaxUsesrShare))
                    {
                        objTran.Rollback();
                        return;
                    }
                    objTran.Commit();
                }
            }
            catch
            {
                objTran.Rollback();
            }
            finally
            {
                objData.DeConnect();
            }
            //Cache.Remove("Widget_Scheduler_" + User.strUsername);
        }

        private string LoadShare(int intAppID)
        {
            string strResult = "";
            try
            {
                SCHAppointmentShare objAppShare = new SCHAppointmentShare();
                DataTable dt = new DataTable();
                dt = objAppShare.GetByID(intAppID);

                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    strResult += "<div><input checked='checked' type='checkbox' name='chkUserSharer' value='" + dt.Rows[i]["Username"] + "' />" + dt.Rows[i]["Username"] + " - " + dt.Rows[i]["Fullname"] + "</div>";
                }
            }
            catch (Exception objEx)
            {
                new SystemMessage("L?i khi l?y danh sách User du?c share!", "", "Controls_MD_Scheduler_Appointment.LoadShare(int intAppID)<br />ERROR: " + objEx.ToString());
            }
            return strResult;
        }
        public string[] GetData(int intAppID, bool ExistCRM)
        {
            string[] arrResult = new string[13];
            try
            {
                SCHAppointment objMain = new SCHAppointment();
                objMain.AppID = intAppID;

                if (objMain.LoadByPrimaryKeys())
                {
                    //LoadDiscuss(objMain.AppID);
                    //LoadInfoUser(objMain.AppID);
                    arrResult[0] = objMain.IsShareAll.ToString().ToLower();
                    arrResult[1] = objMain.Place;
                    if (objMain.ProgressID > 0)
                        arrResult[2] = objMain.ProgressID.ToString();
                    if (objMain.PriorityID > 0)
                        arrResult[3] = objMain.PriorityID.ToString();
                    if (objMain.AppType > 0)
                    {
                        arrResult[4] = objMain.AppType.ToString();
                    }

                    if (objMain.EntityID > 0 && ExistCRM)
                    {
                        CRMENTITIES objEntity = new CRMENTITIES();
                        objEntity.ENTITYID = objMain.EntityID;
                        if (objEntity.LoadByPrimaryKeys())
                        {
                            arrResult[11] = objEntity.UserType.ToString();
                            if (objEntity.UserType)
                                arrResult[7] = objEntity.OWNERID.ToString();
                            else
                            {
                                arrResult[5] = objEntity.Username;
                                arrResult[6] = objEntity.Fullname;
                            }
                        }
                        CRMRELATEDLIST objRELATEDLIST = new CRMRELATEDLIST();
                        DataTable dtContactList = objRELATEDLIST.GetRelatedList(objMain.EntityID, CRMENTITIES.Contact);
                        for (int i = 0; i < dtContactList.Rows.Count; i++)
                        {
                            //if (lstContact.Items.FindByValue(dtContactList.Rows[i]["ContactID"].ToString()) == null && lstContact.Items.FindByValue(intEntityID.ToString()) == null)
                            //    lstContact.Items.Add(new ListItem(dtContactList.Rows[i]["Firstname"] + " " + dtContactList.Rows[i]["Lastname"], dtContactList.Rows[i]["ContactID"].ToString()));
                        }
                        arrResult[8] = objMain.RELATEDENTITYNAME;//objectName
                        arrResult[9] = objMain.RELATEDENTITYID.ToString();//EntityID
                        objEntity = new CRMENTITIES();
                        objEntity.ENTITYID = objMain.RELATEDENTITYID;
                        if (objEntity.LoadByPrimaryKeys())
                            arrResult[10] = objEntity.MODULEID.ToString();//ddlObject
                    }
                    arrResult[12] = LoadShare(objMain.AppID);

                    //if (drw.Length > 0)
                    //{
                    //    if (Convert.ToBoolean(drw[0]["IsShared"]))
                    //    {
                    //        string strDivButtonID = rsdMain.ClientID + "_Form_UpdateButton";
                    //        ScriptManager.RegisterStartupScript(Page, typeof(string), "", "document.getElementById('" + strDivButtonID + "').style.display = 'none';", true);
                    //        Page.ClientScript.RegisterStartupScript(typeof(string), "CloseButtonPanel", "document.getElementById('" + strDivButtonID + "').style.display = 'none';", true);
                    //        isShare = 1;
                    //        pnlProgress.Enabled = false;
                    //    }
                    //    else
                    //    {
                    //        isShare = 0;
                    //        pnlProgress.Enabled = true;
                    //    }
                    //    ScriptManager.RegisterStartupScript(Page, typeof(string), "toggleAll", "toggleAll('" + isShare + "')", true);
                    //    updProgress.Update();
                    //}
                }
            }
            catch
            {
            }
            return arrResult;
        }
        public static void UpdateUserShareData(string strUser, bool IsChecked)
        {
            if (HttpContext.Current.Session["SCH_UserShareData"] != null)
            {
                DataTable dt = (DataTable)HttpContext.Current.Session["SCH_UserShareData"];
                DataRow[] arr = dt.Select("[Tên TK]='" + strUser + "'");
                if (arr.Length > 0)
                    arr[0]["Checked"] = IsChecked;
                HttpContext.Current.Session["SCH_UserShareData"] = dt;
            }
        }
        public void InsertFull(string strSubject, DateTime dtmStart, DateTime dtmEnd, string strRecurrenceRule, int intRecurrenceParentID, bool bolShareAll, string strPlace, int intProcess, int intPriority, int intType, bool bolGroup, string strOwnerUsername, string strObjectName, int intAccountID, string strLstContact, int intEntityID, int intOwner, bool bolExistCRM, string strUserShare, int intMaxUserShare)
        {
            string str = System.Threading.Thread.CurrentThread.ManagedThreadId.ToString();

            IDbTransaction objTran = null;
            IData objData = new IData();
            SCHAppointment objMain = new SCHAppointment();
            try
            {
                objData.Connect();
                WebLibs.User objUser = (WebLibs.User)HttpContext.Current.Session["User"];

                objMain.Subject = strSubject;
                //objMain.Start = dtmStart.AddHours(intTimeZone);
                //objMain.End = dtmEnd.AddHours(intTimeZone);
                objMain.Start = dtmStart;
                objMain.End = dtmEnd;
                objMain.RecurrenceRule = strRecurrenceRule;
                objMain.RecurrenceParentID = intRecurrenceParentID;

                objTran = objData.GetConnection().BeginTransaction();
                objData.Transaction = objTran;
                objMain.DataObject = objData;
                objMain.Username = objUser.strUsername;
                objMain.IsShareAll = bolShareAll;
                objMain.UserShare = strUserShare;
                objMain.MaxUsesrShare = intMaxUserShare;
                objMain.Place = strPlace;
                if (intProcess > 0)
                    objMain.ProgressID = intProcess;

                objMain.PriorityID = intPriority;
                objMain.AppType = intType;
                if (bolExistCRM && intEntityID > 0)
                {
                    CRMENTITIES objEntity = new CRMENTITIES();
                    objEntity.DataObject = objData;
                    objEntity.CREATEDUSER = objUser.strUsername;
                    if (!bolGroup)
                    {
                        GlobalFunction objFun = new GlobalFunction();
                        if (strOwnerUsername != "")
                            objEntity.OWNERID = Convert.ToInt32(objFun.GetUserInfo(strOwnerUsername).Rows[0]["UserID"]);
                    }
                    else
                        if (intOwner > 0)
                            objEntity.OWNERID = intOwner;

                    objEntity.MODULEID = CRMENTITIES.Activity;
                    objMain.EntityID = Convert.ToInt32(objEntity.Insert());
                    CRMRELATEDLIST objRELATEDLIST = new CRMRELATEDLIST();
                    objRELATEDLIST.DataObject = objData;
                    if (strObjectName != "")
                    {
                        objMain.RELATEDENTITYID = intAccountID;
                        objMain.RELATEDENTITYNAME = strObjectName;
                    }
                    string[] arrContact = strLstContact.Split(',');
                    for (int i = 0; i < arrContact.Length; i++)
                    {
                        objRELATEDLIST.ENTITYID = objMain.EntityID;
                        objRELATEDLIST.RELATEDENTITYID = Convert.ToInt32(arrContact[i]);
                        objRELATEDLIST.Insert();
                    }
                    objRELATEDLIST.ENTITYID = objMain.EntityID;
                    objRELATEDLIST.RELATEDENTITYID = intEntityID;
                    objRELATEDLIST.Insert();
                }
                int intResult = Convert.ToInt32(objMain.Insert());
                if (intResult > 0)
                {
                    if (!AddGuest(intResult, objData, objMain.IsShareAll, objMain.UserShare, objMain.MaxUsesrShare))
                    {
                        objTran.Rollback();
                        return;
                    }
                }
                objTran.Commit();
            }
            catch
            {
                objTran.Rollback();
            }
            finally
            {
                objData.DeConnect();
            }
            //Cache.Remove("Widget_Scheduler_" + User.strUsername);
        }
        public static void DeleteFull(int intAppID)
        {
            try
            {
                SCHAppointment objMain = new SCHAppointment();
                objMain.AppID = intAppID;
                WebLibs.User objUser = (WebLibs.User)HttpContext.Current.Session["User"];
                if (objMain.LoadByPrimaryKeys())
                    if (objMain.Username != objUser.strUsername)
                    {
                        SCHAppointmentShare objShare = new SCHAppointmentShare();
                        objShare.AppID = intAppID;
                        objShare.Username = objUser.strUsername;
                        objShare.Delete();

                    }
                    else
                        objMain.Delete();
            }
            catch (Exception objEx)
            {
                new SystemMessage("L?i khi xoá s? ki?n!", "", "Controls_MD_Scheduler_Appointment.DoDelete(int intAppID)<br />ERROR: " + objEx.ToString());
            }
        }

        public override void Insert(RadScheduler owner, Appointment appointment)
        {
            //if (!PersistChanges)
            //{
            //    return;
            //}
            //if (appointment.Start > appointment.End)
            //{
            //    return;
            //}
            //if (appointment.Subject.Length < 1)
            //{
            //    return;
            //}

            //IDbTransaction objTran = null;
            //IData objData = new IData();
            //SCHAppointment objMain = new SCHAppointment();
            //try
            //{
            //    objData.Connect();
            //    WebLibs.User objUser = (WebLibs.User)HttpContext.Current.Session["User"];
            //    objTran = objData.GetConnection().BeginTransaction();
            //    objData.Transaction = objTran;
            //    objMain = (SCHAppointment)HttpContext.Current.Session["Appointment_Data"];
            //    objMain.DataObject = objData;

            //    objMain.Subject = appointment.Subject;
            //    objMain.Start = appointment.Start;
            //    objMain.End = appointment.End;
            //    objMain.RecurrenceRule = appointment.RecurrenceRule;
            //    objMain.RecurrenceParentID = Convert.ToInt32(appointment.RecurrenceParentID);

            //    int intResult = Convert.ToInt32(objMain.Insert());
            //    if (intResult > 0)
            //    {
            //        if (!AddGuest(intResult, objData, objMain.IsShareAll, objMain.UserShare, objMain.MaxUsesrShare))
            //        {
            //            objTran.Rollback();
            //            return;
            //        }
            //    }

            //    objTran.Commit();
            //}
            //catch
            //{
            //    objTran.Rollback();
            //}
            //finally
            //{
            //    objData.DeConnect();
            //}
        }
        /// <summary>
        /// Thêm ngu?i chia s? 1 s? ki?n
        /// </summary>
        /// <param name="intAppID"></param>
        private bool AddGuest(int intAppID, IData objData, bool bolShareAll, string strListUserGroup, int intMaxSharedUser)
        {
            SCHAppointmentShare objAppShare = new SCHAppointmentShare();
            objAppShare.DataObject = objData;
            try
            {
                objAppShare.AppID = intAppID;
                objAppShare.DeleteAll();
            }
            catch
            { }
            if (!bolShareAll)
            {
                int iCountUser = 0;
                string[] arrUserGroup = strListUserGroup.Split(',');
                iCountUser = arrUserGroup.Length;

                if (bolShareAll || iCountUser <= intMaxSharedUser)
                {
                    if (arrUserGroup != null)
                    {
                        foreach (string strItem in arrUserGroup)
                        {
                            if (strItem != "")
                            {
                                objAppShare.AppID = intAppID;
                                objAppShare.Username = strItem;
                                if (!objAppShare.LoadByPrimaryKeys())
                                    objAppShare.Insert();
                            }
                        }
                    }
                }
                else
                {
                    return false;
                }
            }
            return true;
        }

        public override void Update(RadScheduler owner, Appointment appointment)
        {
            //if (!PersistChanges)
            //{
            //    return;
            //}
            //if (appointment.Start > appointment.End)
            //{
            //    return;
            //}
            //if (appointment.Subject.Length < 1)
            //{
            //    return;
            //}

            //IDbTransaction objTran = null;
            //IData objData = new IData();
            //SCHAppointment objMain = new SCHAppointment();
            //try
            //{
            //    objData.Connect();
            //    WebLibs.User objUser = (WebLibs.User)HttpContext.Current.Session["User"];
            //    objTran = objData.GetConnection().BeginTransaction();
            //    objData.Transaction = objTran;
            //    objMain = (SCHAppointment)HttpContext.Current.Session["Appointment_Data"];
            //    objMain.DataObject = objData;

            //    objMain.Subject = appointment.Subject;
            //    objMain.Start = appointment.Start;
            //    objMain.End = appointment.End;
            //    objMain.RecurrenceRule = appointment.RecurrenceRule;
            //    objMain.RecurrenceParentID = Convert.ToInt32(appointment.RecurrenceParentID);

            //    int intResult = Convert.ToInt32(objMain.Update());
            //    if (intResult > 0)
            //    {
            //        if (!AddGuest(intResult, objData, objMain.IsShareAll, objMain.UserShare, objMain.MaxUsesrShare))
            //        {
            //            objTran.Rollback();
            //            return;
            //        }
            //    }

            //    objTran.Commit();
            //}
            //catch
            //{
            //    objTran.Rollback();
            //}
            //finally
            //{
            //    objData.DeConnect();
            //}
        }

        public override void Delete(RadScheduler owner, Appointment appointmentToDelete)
        {
            if (!PersistChanges)
            {
                return;
            }
            try
            {
                SCHAppointment objMain = new SCHAppointment();
                objMain.AppID = Convert.ToInt32(appointmentToDelete.ID);
                WebLibs.User objUser = (WebLibs.User)HttpContext.Current.Session["User"];
                if (objMain.LoadByPrimaryKeys())
                    if (objMain.Username != objUser.strUsername)
                    {
                        SCHAppointmentShare objShare = new SCHAppointmentShare();
                        objShare.AppID = Convert.ToInt32(appointmentToDelete.ID);
                        objShare.Username = objUser.strUsername;
                        objShare.Delete();

                    }
                    else
                        objMain.Delete();
            }
            catch (Exception objEx)
            {
                new SystemMessage("L?i khi xoá s? ki?n!", "", "Controls_MD_Scheduler_Appointment.DoDelete(int intAppID)<br />ERROR: " + objEx.ToString());
            }
        }

        public override IEnumerable<ResourceType> GetResourceTypes(RadScheduler owner)
        {
            ResourceType[] resourceTypes = new ResourceType[2];
            resourceTypes[0] = new ResourceType("Teacher", false);
            resourceTypes[1] = new ResourceType("Student", true);

            return resourceTypes;
        }

        public override IEnumerable<Resource> GetResourcesByType(RadScheduler owner, string resourceType)
        {
            switch (resourceType)
            {
                case "Teacher":
                    return Teachers.Values;

                case "Student":
                    return Students.Values;

                default:
                    throw new InvalidOperationException("Unknown resource type: " + resourceType);
            }
        }

        private void LoadResources(Appointment apt)
        {
            using (DbConnection conn = OpenConnection())
            {
                DbCommand cmd = DbFactory.CreateCommand();
                cmd.Connection = conn;

                cmd.Parameters.Add(CreateParameter("@ClassID", apt.ID));
                cmd.CommandText = "SELECT [TeacherID] FROM [DbProvider_Classes] WHERE [ClassID] = @ClassID AND [TeacherID] IS NOT NULL";
                using (DbDataReader reader = cmd.ExecuteReader())
                {
                    if (reader.Read())
                    {
                        Resource teacher = Teachers[Convert.ToInt32(reader["TeacherID"])];
                        apt.Resources.Add(teacher);
                    }
                }

                cmd.Parameters.Clear();
                cmd.Parameters.Add(CreateParameter("@ClassID", apt.ID));
                cmd.CommandText = "SELECT [StudentID] FROM [DbProvider_ClassStudents] WHERE [ClassID] = @ClassID";
                using (DbDataReader reader = cmd.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        Resource student = Students[Convert.ToInt32(reader["StudentID"])];
                        apt.Resources.Add(student);
                    }
                }
            }
        }

        private IEnumerable<Resource> LoadTeachers()
        {
            List<Resource> resources = new List<Resource>();

            //IData objData = new IData();
            //try
            //{
            //    objData.Connect();
            //    objData.CreateNewStoredProcedure("SCH_Appointment_Get");
            //    objData.AddParameter("@strUsername", "administrator");
            //    objData.AddParameter("@intViewOption", 1);
            //    IDataReader reader = objData.ExecStoreToDataReader();

            //    while (reader.Read())
            //    {
            //        Resource res = new Resource();
            //        res.Type = "Teacher";
            //        res.Key = reader["AppID"];
            //        res.Text = Convert.ToString(reader["subject"]);
            //        //res.Attributes["Phone"] = Convert.ToString(reader["Phone"]);
            //        resources.Add(res);
            //    }
            //}
            //catch
            //{
            //}
            //finally
            //{
            //    objData.DeConnect();
            //}

            //using (DbConnection conn = OpenConnection())
            //{
            //    DbCommand cmd = DbFactory.CreateCommand();
            //    cmd.Connection = conn;
            //    cmd.CommandText = "SELECT [TeacherID], [Name], [Phone] FROM [DbProvider_Teachers]";

            //    using (DbDataReader reader = cmd.ExecuteReader())
            //    {
            //        while (reader.Read())
            //        {
            //            Resource res = new Resource();
            //            res.Type = "Teacher";
            //            res.Key = reader["TeacherID"];
            //            res.Text = Convert.ToString(reader["Name"]);
            //            res.Attributes["Phone"] = Convert.ToString(reader["Phone"]);
            //            resources.Add(res);
            //        }
            //    }
            //}

            return resources;
        }

        private IEnumerable<Resource> LoadStudents()
        {
            List<Resource> resources = new List<Resource>();
            //IData objData = new IData();
            //try
            //{
            //    objData.Connect();
            //    objData.CreateNewStoredProcedure("SCH_Appointment_Get");
            //    objData.AddParameter("@strUsername", "administrator");
            //    objData.AddParameter("@intViewOption", 1);
            //    IDataReader reader = objData.ExecStoreToDataReader();

            //    while (reader.Read())
            //    {
            //        Resource res = new Resource();
            //        res.Type = "Teacher";
            //        res.Key = reader["AppID"];
            //        res.Text = Convert.ToString(reader["subject"]);
            //        //res.Attributes["Phone"] = Convert.ToString(reader["Phone"]);
            //        resources.Add(res);
            //    }
            //}
            //catch
            //{
            //}
            //finally
            //{
            //    objData.DeConnect();
            //}
            //using (DbConnection conn = OpenConnection())
            //{
            //    DbCommand cmd = DbFactory.CreateCommand();
            //    cmd.Connection = conn;
            //    cmd.CommandText = "SELECT [StudentID], [Name] FROM [DbProvider_Students]";

            //    using (DbDataReader reader = cmd.ExecuteReader())
            //    {
            //        while (reader.Read())
            //        {
            //            Resource res = new Resource();
            //            res.Type = "Student";
            //            res.Key = reader["StudentID"];
            //            res.Text = Convert.ToString(reader["Name"]);
            //            resources.Add(res);
            //        }
            //    }
            //}

            return resources;
        }

        private void FillClassStudents(Appointment appointment, DbCommand cmd, object classId)
        {
            foreach (Resource student in appointment.Resources.GetResourcesByType("Student"))
            {
                cmd.Parameters.Clear();
                cmd.Parameters.Add(CreateParameter("@ClassID", classId));
                cmd.Parameters.Add(CreateParameter("@StudentID", student.Key));

                cmd.CommandText = "INSERT INTO [DbProvider_ClassStudents] ([ClassID], [StudentID]) VALUES (@ClassID, @StudentID)";
                cmd.ExecuteNonQuery();
            }
        }

        private void ClearClassStudents(object classId, DbCommand cmd)
        {
            cmd.Parameters.Clear();
            cmd.Parameters.Add(CreateParameter("@ClassID", classId));
            cmd.CommandText = "DELETE FROM [DbProvider_ClassStudents] WHERE [ClassID] = @ClassID";
            cmd.ExecuteNonQuery();
        }

        private void PopulateAppointmentParameters(DbCommand cmd, Appointment apt)
        {
            cmd.Parameters.Add(CreateParameter("@Subject", apt.Subject));
            cmd.Parameters.Add(CreateParameter("@Start", apt.Start));
            cmd.Parameters.Add(CreateParameter("@End", apt.End));

            Resource teacher = apt.Resources.GetResourceByType("Teacher");
            object teacherId = null;
            if (teacher != null)
            {
                teacherId = teacher.Key;
            }
            cmd.Parameters.Add(CreateParameter("@TeacherID", teacherId));

            string rrule = null;
            if (apt.RecurrenceRule != string.Empty)
            {
                rrule = apt.RecurrenceRule;
            }
            cmd.Parameters.Add(CreateParameter("@RecurrenceRule", rrule));

            object parentId = null;
            if (apt.RecurrenceParentID != null)
            {
                parentId = apt.RecurrenceParentID;
            }
            cmd.Parameters.Add(CreateParameter("@RecurrenceParentId", parentId));
        }
    }
}

3 Answers, 1 is accepted

answered on 08 Mar 2012, 07:15 AM

Hi,

Has anyone managed to fix their issue with HttpContext.Current.Session being null/empty when it's accessed from the Scheduler Web Service?

I've ensured that my web service method enables session, and I've also ensured the IRequiresSessionState interface is implemented on the web service.

Here is the modified sample code that I found from other thread in Telerik Forum:

Ref: http://www.telerik.com/community/code-library/aspnet-ajax/scheduler/filter-appointments-by-sending-additional-information-to-the-web-service-and-the-provider.aspx

RadSchedulerForm.aspx

<%@ Page Language="VB" AutoEventWireup="true" Inherits="SchedulerDbProvider.RadSchedulerWebForm" Codebehind="RadSchedulerWebForm.aspx.vb" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<title></title>

<telerik:RadStyleSheetManager ID="RadStyleSheetManager1" runat="server" />

</head>

<body>

<form id="form1" runat="server">

<telerik:RadScriptManager ID="RadScriptManager1" runat="server">

<Scripts>

<%--Needed for JavaScript IntelliSense in VS2010--%>

<%--For VS2008 replace RadScriptManager with ScriptManager--%>

<asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" />

</Scripts>

</telerik:RadScriptManager>

<script type="text/javascript">

var teacherID = "all";

function OnClientSelectedIndexChanged(sender, args) {

teacherID = args.get_item().get_value();

var scheduler = $find('<%=RadScheduler1.ClientID %>');

scheduler.rebind();

}

function OnClientAppointmentsPopulating(sender, eventArgs) {

eventArgs.get_schedulerInfo().TeacherID = teacherID;

}

</script>

<p>

Filter appointments by teacher (resource):

</p>

<p>

<telerik:RadComboBox ID="RadComboBox1" runat="server" OnClientSelectedIndexChanged="OnClientSelectedIndexChanged">

<Items>

<telerik:RadComboBoxItem Text="All" Value="all" />

<telerik:RadComboBoxItem Text="Teacher 1" Value="1" />

<telerik:RadComboBoxItem Text="Teacher 2" Value="2" />

</Items>

</telerik:RadComboBox>

</p>

<telerik:RadScheduler ID="RadScheduler1" runat="server" OnClientAppointmentsPopulating="OnClientAppointmentsPopulating"

AppointmentStyleMode="Default" SelectedView="WeekView" SelectedDate="2011-01-21"

Width="600px">

<WebServiceSettings Path="SchedulerWebService.asmx" ResourcePopulationMode="ServerSide" />

<ResourceStyles>

<telerik:ResourceStyleMapping Type="Teacher" Key="1" BackColor="Orange" />

<telerik:ResourceStyleMapping Type="Teacher" Key="2" BackColor="Aqua" />

</ResourceStyles>

</telerik:RadScheduler>

</form>

</body>

</html>

RadSchedulerWebForm.aspx.vb

Imports System

Imports System.Web.UI

Imports Telerik.Web.UI

Imports System.Net

Imports System.Web

Imports System.Web.Security

Partial Class RadSchedulerWebForm

Inherits System.Web.UI.Page

Protected Sub RadScheduler1_ResourcesPopulating(sender As Object, e As Telerik.Web.UI.ResourcesPopulatingEventArgs) Handles RadScheduler1.ResourcesPopulating

Dim cookie As HttpCookie = FormsAuthentication.GetAuthCookie(HttpContext.Current.User.Identity.Name, False)

Dim cookieHeader As String = String.Format("{0}={1}", cookie.Name, cookie.Value)

e.Headers.Add(HttpRequestHeader.Cookie, cookieHeader)

Session.Add("connectionString", ConfigurationManager.ConnectionStrings("TelerikVSXConnectionString").ConnectionString)

End Sub

End Class

SchedulerWebService.asmx.vb

Imports System.Web.Services

Imports System.Web.Services.Protocols

Imports System.ComponentModel

Imports Telerik.Web.UI

Imports System.Data.Common

' To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.

<System.Web.Script.Services.ScriptService()> _

<System.Web.Services.WebService(Namespace:="http://tempuri.org/")> _

<System.Web.Services.WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _

<ToolboxItem(False)> _

Public Class SchedulerWebService

Inherits System.Web.Services.WebService

Implements

IRequiresSessionState

Private _controller As WebServiceAppointmentController

'private MySchedulerInfo localSchedulerInfo;

Private _provider As MyDbSchedulerProvider

Private ReadOnly Property Provider() As MyDbSchedulerProvider

Get

If _provider Is Nothing Then

Dim connString As String = String.Empty

If HttpContext.Current.Session.Count > 0 AndAlso Not String.IsNullOrEmpty(HttpContext.Current.Session.Item("connectionString").ToString()) Then

connString = HttpContext.Current.Session.Item("connectionString").ToString()

End If

Dim factory = DbProviderFactories.GetFactory("System.Data.SqlClient")

_provider = New MyDbSchedulerProvider() With { _

.ConnectionString = connString, _

.DbFactory = factory, _

.PersistChanges = True _

}

End If

Return _provider

End Get

End Property

''' <summary>

''' The WebServiceAppointmentController class is used as a facade to the SchedulerProvider.

''' </summary>

Private ReadOnly Property Controller() As WebServiceAppointmentController

Get

If _controller Is Nothing Then

_controller = New WebServiceAppointmentController(Provider)

End If

Return _controller

End Get

End Property