protected void btnCalender_Click(object sender, EventArgs e)
        {
            DateTime dateStart = Convert.ToDateTime(txtCalender1.Text);
            DateTime dateEnd   = Convert.ToDateTime(txtCalender2.Text);

            if (lblControl.Text == "Okunmayan")
            {
                ListMessage.DataSource = (from v in db.Visitor
                                          where v.Readed == false &&
                                          v.SendTime >= dateStart &&
                                          v.SendTime <= dateEnd
                                          orderby v.SendTime descending
                                          select new
                {
                    ID = v.ID,
                    FullName = v.FullName,
                    Subject = v.Subject,
                    SendTime = v.SendTime,
                    Readed = v.Readed,
                    Message = (v.Message.Length > 50) ? v.Message.Substring(0, 149) : v.Message
                }).ToList();
                ListMessage.DataBind();
            }
            else if (lblControl.Text == "Okunan")
            {
                ListMessage.DataSource = (from v in db.Visitor
                                          where v.Readed == true &&
                                          v.SendTime >= dateStart &&
                                          v.SendTime <= dateEnd
                                          orderby v.SendTime descending
                                          select new
                {
                    ID = v.ID,
                    FullName = v.FullName,
                    Subject = v.Subject,
                    SendTime = v.SendTime,
                    Readed = v.Readed,
                    Message = (v.Message.Length > 50) ? v.Message.Substring(0, 149) : v.Message
                }).ToList();
                ListMessage.DataBind();
            }
            else
            {
                ListMessage.DataSource = (from v in db.Visitor
                                          where v.SendTime >= dateStart &&
                                          v.SendTime <= dateEnd
                                          orderby v.SendTime descending
                                          select new
                {
                    ID = v.ID,
                    FullName = v.FullName,
                    Subject = v.Subject,
                    SendTime = v.SendTime,
                    Readed = v.Readed,
                    Message = (v.Message.Length > 50) ? v.Message.Substring(0, 149) : v.Message
                }).ToList();
                ListMessage.DataBind();
            }
        }
 protected void Page_Load(object sender, EventArgs e)
 {
     ListMessage.DataSource = (from v in db.Visitor
                               orderby v.SendTime descending
                               select new {
         ID = v.ID,
         FullName = v.FullName,
         Subject = v.Subject,
         SendTime = v.SendTime,
         Readed = v.Readed,
         Message = (v.Message.Length > 50) ?  v.Message.Substring(0, 49) + "..." : v.Message
     }).ToList();
     ListMessage.DataBind();
     ((Master)this.Master).Path     = "Ziyaretçi";
     ((Master)this.Master).PathLink = "VisitorPage.aspx";
 }
        protected void btnOkunan_Click(object sender, EventArgs e)
        {
            ListMessage.DataSource = (from v in db.Visitor
                                      where v.Readed == true orderby v.SendTime descending
                                      select new
            {
                ID = v.ID,
                FullName = v.FullName,
                Subject = v.Subject,
                SendTime = v.SendTime,
                Readed = v.Readed,
                Message = (v.Message.Length > 50) ? v.Message.Substring(0, 149) : v.Message
            }).ToList();
            ListMessage.DataBind();

            lblControl.Text = "Okunan";
        }