Restrict multiple login of a single user in asp.net using cache

//On Master Page

protected void Page_Init(object sender, EventArgs e)

    {

        Response.Cache.SetExpires(DateTime.UtcNow.AddMinutes(-1));

        Response.Cache.SetCacheability(HttpCacheability.NoCache);

        Response.Cache.SetNoStore();

    }

protected void Page_Load(object sender, EventArgs e)

    {

        Response.Cache.SetCacheability(HttpCacheability.NoCache);

        Response.Cache.SetAllowResponseInBrowserHistory(false);

        Request.Browser.Adapters.Clear();

       

}

Globly- Login Page

 public System.Data.DataTable dtSessionGlobal = new DataTable();

//On Page Load

 protected void Page_Load(object sender, EventArgs e)

    {      

        if (Cache["UserSessions"] != null)

        {

            dtSessionGlobal = (DataTable)Cache["UserSessions"];

            if (dtSessionGlobal.Columns.Count == 0)

            {

                dtSessionGlobal.Columns.Add("UserName");

                dtSessionGlobal.Columns.Add("SessionID");

            }

        }

        else

        {

            dtSessionGlobal.Columns.Add("UserName");

            dtSessionGlobal.Columns.Add("SessionID");

            Cache["UserSessions"] = dtSessionGlobal;

        }

}

//On All Page Load Event

 protected void Page_Load(object sender, EventArgs e)

    {

        

        DataTable dtSessionGlobal = new DataTable();

        if (Cache["UserSessions"] != null)

        {

            dtSessionGlobal = (DataTable)Cache["UserSessions"];

        }

        if (Session["username"] == null)

        {

            Response.Redirect("~/SignIn Users", false);

        }

        

        if (!IsPostBack)

        {

            if (dtSessionGlobal.Rows.Count > 0)

            {

                System.Data.DataRow[] dr = dtSessionGlobal.Select(" UserName='" + Session["UName"] + "' AND SessionID<>'" + Session.SessionID + "'");

                if (dr.Length > 0)

                {

                    Response.Redirect("~/SignIn Users");

                }

                else if (dtSessionGlobal.Select(" UserName='" + Session["UName"] + "'").Length == 0)

                {

                    Response.Redirect("~/SignIn Users");

                }

            }

}

Open new tab in asp.net code behind

//HTML

<asp:Button ID="Button1" runat="server" Text="Button" 

onclick="Button1_Click" 
OnClientClick ="document.forms[0].target = '_blank';" />

//Code Behind

protected void Button1_Click(object sender, EventArgs e)

    {

        string newtabl = @"~/FrmNewContent.aspx";

        Response.Redirect(newtabl);       

    }

Get Control id using jquery

//id with control id

$('#<%=Controlid.ClientID%>').attr('id')

//Id with Class Name

$('.ButtonClass').attr('id');

Count Number of columns in a table using javascript or jquery

//HTML

<table id="table1">
<tr>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
</tr>
<tr>
</table>
cells
<script>
alert(document.getElementById('table1').rows[0].cells.length)
</script>

//Jquery

 <script type="text/javascript">
       $(document).ready(function () {
              alert($(Table).find('tr')[0].cells.length);
         

       });  
   </script>

Direct insert and create table from Sql server Query-

//Sql Query-

Select * into TableNameA From TableNameB

Add CSS in gridview cells using jquery in asp.net

//HTML -GridView

 <asp:GridView ID="GridView1" runat="server" >
        </asp:GridView>

//Jquery-

<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>

 <script type="text/javascript" language="javascript">

    $(document).ready(function () {
        $(function () {
            $('#<%=GridView1.ClientID%> td').toggle(function () {
                $(this).css('background', '#93BD00');

            },
                function () {
                    $(this).css('background', 'white', 'cursor', 'pointer', 'padding', '2px');
                });
        });
 </script>

Check and Uncheck all Checkboxlist using javascript in asp.net

///HTML

<asp:CheckBoxList ID="CheckBoxList1" RepeatDirection="Vertical" runat="server" onclick="javascript: changeSelectAll ()">
                    </asp:CheckBoxList>

<asp:CheckBox ID="CheckBox1" runat="server" onclick="javascript: CheckBoxListSelect (this.id)" />  


//CheckBoxList function

function CheckBoxListSelect(chkid, chblid) {
       var chkBoxList = document.getElementById('<%= CheckBoxList1.ClientID %>');
       var chkB = document.getElementById(chkid);
       if (chkB.checked) {
           var chkBoxCount = chkBoxList.getElementsByTagName("input");
           for (var i = 0; i < chkBoxCount.length; i++) {
               chkBoxCount[i].checked = true;
           }
       }
       if (!chkB.checked) {
           var chkBoxCount = chkBoxList.getElementsByTagName("input");
           for (var i = 0; i < chkBoxCount.length; i++) {
               chkBoxCount[i].checked = false;
           }
       }

       return false;
   }


//CheckBoxList function


   function changeSelectAll() {
       var chkBoxList = document.getElementById('<%= CheckBoxList1.ClientID %>');
       var chkb = document.getElementById('<%= CheckBox1.ClientID %>')
       var chekb = true;
       var chkBoxCount = chkBoxList.getElementsByTagName("input");
       for (var i = 0; i < chkBoxCount.length; i++) {
           if (!chkBoxCount[i].checked) {
               chekb = false;
               break;
           }
       }
       if (chekb) { chkb.checked = true; } else { chkb.checked = false; }
       return false;
   }