rad grid, drag and drop

<%@ Page Title="" Language="C#" MasterPageFile="~/Masters/admin.master" AutoEventWireup="true" CodeFile="testDragDrop.aspx.cs" Inherits="Admin_policy_testDragDrop" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

<%--<telerik:RadScriptManager runat="server" ID="RadScriptManager1" />--%>
<telerik:RadFormDecorator ID="RadFormDecorator1" DecoratedControls="All" runat="server"
Skin="Metro" EnableRoundedCorners="false"></telerik:RadFormDecorator>

<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" Width="256px" Height="64px" MinDisplayTime="5000">
<asp:Label ID="Label2" runat="server" ForeColor="Red">Loading... </asp:Label>
</telerik:RadAjaxLoadingPanel>

<%--    <asp:Image ID="Image1" runat="server" Width="224px" Height="48px" ImageUrl="~/Loading.gif"></asp:Image>--%>

<telerik:RadAjaxManager runat="server" ID="radAjax" DefaultLoadingPanelID="RadAjaxLoadingPanel1">
<AjaxSettings>
<telerik:AjaxSetting AjaxControlID="grdPolicy">
<UpdatedControls>
<telerik:AjaxUpdatedControl ControlID="grdPolicy" ></telerik:AjaxUpdatedControl>
</UpdatedControls>
</telerik:AjaxSetting>
</AjaxSettings>
</telerik:RadAjaxManager>

<telerik:RadScriptBlock runat="server" ID="scriptBlock">
<script type="text/javascript">
//<![CDATA[
function onRowDropping(sender, args) {
if (sender.get_id() == "<%=grdPolicy.ClientID %>") {
var node = args.get_destinationHtmlElement();
if (!isChildOf('<%=grdPolicy.ClientID %>', node)) {
args.set_cancel(true);
}
}

}

function isChildOf(parentId, element) {
while (element) {
if (element.id && element.id.indexOf(parentId) > -1) {
return true;
}
element = element.parentNode;
}
return false;
}
//]]>
</script>
</telerik:RadScriptBlock>
<div class="exWrap">

<p class="howto">
Select and drag orders from pending to shipped when dispatched<br />
Reorder pending orders on priority by drag and drop<br />
Drop a shipped order over the recycle bin to delete it</p>
<div style="float: left; padding: 0 6px 0 10px">
<h2 style="color: #9c3608">
Pending Orders</h2>
<telerik:RadGrid runat="server" ID="grdPolicy" AutoGenerateColumns="false"
AllowPaging="True" Width="350px"  AllowMultiRowSelection="true"
PageSize="30" onneeddatasource="grdPolicy_NeedDataSource"
onrowdrop="grdPolicy_RowDrop" ondeletecommand="grdPolicy_DeleteCommand"
onitemcommand="grdPolicy_ItemCommand" >
<MasterTableView DataKeyNames="PolicyId" Width="100%" TableLayout="Fixed" CssClass="table table-bordered table-primary" >
<Columns>
<telerik:GridDragDropColumn HeaderStyle-Width="18px" Visible="false">
</telerik:GridDragDropColumn>
<telerik:GridBoundColumn HeaderText="Policy Name" DataField="Name"></telerik:GridBoundColumn>

<telerik:GridTemplateColumn>
<ItemTemplate>
<asp:HyperLink runat="server" NavigateUrl='<%# Eval("PolicyId","edit.aspx?PolicyId={0}") %>' CssClass="btn-action no-border glyphicons edit btn-table"><i></i></asp:HyperLink>
</ItemTemplate>
</telerik:GridTemplateColumn>

<telerik:GridTemplateColumn>
<ItemTemplate>
<asp:LinkButton ID="BtnDelete" runat="server" CssClass="btn-action no-border glyphicons remove_2 btn-table" CommandArgument='<%# Eval("PolicyId") %>' CommandName="Delete" OnClientClick="javascript: return confirm('Are you sure?');"><i></i></asp:LinkButton>
</ItemTemplate>
</telerik:GridTemplateColumn>

</Columns>
</MasterTableView>
<ClientSettings AllowRowsDragDrop="True" AllowColumnsReorder="true" ReorderColumnsOnClient="true">
<Selecting AllowRowSelect="True" EnableDragToSelectRows="false"></Selecting>
<ClientEvents OnRowDropping="onRowDropping"></ClientEvents>
<Scrolling AllowScroll="true" UseStaticHeaders="true"></Scrolling>
</ClientSettings>
<%--<PagerStyle Mode="NumericPages" PageButtonCount="4"></PagerStyle>--%>
</telerik:RadGrid>
</div>

<div style="clear: both;">
</div>
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
</div>

</asp:Content>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Web.UI;
using Telerik.Web.UI;
using HRASP.Entities;
using HR.Managers.Library.Managers;

public partial class Admin_policy_testDragDrop : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
grdPolicy.MasterTableView.GetColumn("DragDropColumn").Visible = true;
}

protected TList<Policy> Policies
{
get
{
try
{
object obj = Session["Policies"];
if (obj == null)
{
obj = PolicyManager.GetAllPolicies();
if (obj != null)
{
Session["Policies"] = obj;
}
else
{
obj = new TList<Policy>();
}
}
return (TList<Policy>)obj;
}
catch (Exception ex)
{
Session["PendingPolicys"] = null;

}

return new TList<Policy>();
}
set { Session["Policies"] = value; }

}

protected void grdPolicy_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
grdPolicy.DataSource = Policies;
}

private void UpdateSortOrder()
{
TList<Policy> list = (TList<Policy>)Policies;

PolicyManager.UpdatePoliciesSortOrder(list);

}

protected void grdPolicy_RowDrop(object sender, GridDragDropEventArgs e)
{
if (string.IsNullOrEmpty(e.HtmlElement))
{
// check drag from which grid
if (e.DraggedItems[0].OwnerGridID == grdPolicy.ClientID)
{
// check drop to whcih grid
if (e.DestDataItem != null && e.DestDataItem.OwnerGridID == grdPolicy.ClientID)
{
//rePolicy items in pending grid
TList<Policy> list = Policies;

var obj1 = e.DestDataItem.GetDataKeyValue("PolicyId");
Policy p = GetPolicy(list, (Guid)e.DestDataItem.GetDataKeyValue("PolicyId"));

int destinationIndex = list.IndexOf(p);

if (e.DropPosition == GridItemDropPosition.Above && e.DestDataItem.ItemIndex > e.DraggedItems[0].ItemIndex)
{
destinationIndex -= 1;
}

if (e.DropPosition == GridItemDropPosition.Below && e.DestDataItem.ItemIndex < e.DraggedItems[0].ItemIndex)
{
destinationIndex += 1;
}

TList<Policy> PolicysToMove = new TList<Policy>();
foreach (GridDataItem draggedItem in e.DraggedItems)
{
Policy tmpPolicy = GetPolicy(list, (Guid)draggedItem.GetDataKeyValue("PolicyId"));
if (tmpPolicy != null)
PolicysToMove.Add(tmpPolicy);
}

foreach (Policy PolicyToMove in PolicysToMove)
{
list.Remove(PolicyToMove);
list.Insert(destinationIndex, PolicyToMove);
}

Policies = list;
grdPolicy.Rebind();

//int destinationItemIndex = destinationIndex - (grdPendingPolicys.PageSize * grdPendingPolicys.CurrentPageIndex);
//e.DestinationTableView.Items[destinationItemIndex].Selected = true;

}

}
}

}

private static Policy GetPolicy(IEnumerable<Policy> PolicysToSearchIn, Guid policyId)
{
foreach (Policy Policy in PolicysToSearchIn)
{
if (Policy.PolicyId == policyId)
{
return Policy;
}
}
return null;
}

protected void Button1_Click(object sender, EventArgs e)
{
UpdateSortOrder();
}

protected void grdPolicy_DeleteCommand(object sender, GridCommandEventArgs e)
{

}

protected void grdPolicy_ItemCommand(object sender, GridCommandEventArgs e)
{
//if (e.CommandName == "Delete")
//{
//    string s = e.CommandArgument.ToString();
//}

try
{
Guid uid = new Guid();

if (Guid.TryParse(e.CommandArgument.ToString(), out uid))
{
if (uid != Guid.Empty)
{
if (e.CommandName == "Delete")
{
PolicyManager.DeletePolicy(uid);

Policies = null;   // get latest data from  db
}

}
}
}
catch (Exception ex)
{

}
}
}