How to Use SpUserToken in SharePoint 2007 or SharePoint 2010

using System; using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Microsoft.SharePoint;
using System.Security;
public partial class WebUserControl : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
SPUserToken sToken = SPContext.Current.Site.SystemAccount.UserToken;
using (SPSite site = new SPSite(http://vlnrm:100/, sToken))
{
using (SPWeb objWeb = site.OpenWeb())
{
SPQuery query = new SPQuery();
query.Query = "<OrderBy><FieldRef Name='ID' Ascending='False' /></OrderBy>";
SPList lst = objWeb.Lists["My Links"];
SPListItemCollection myColl = lst.GetItems(query);
if (myColl.Count > 0)
{
this.Controls.Add(new LiteralControl("<Table width='100%' bgcolor='Aqua'>"));
this.Controls.Add(new LiteralControl("<Tr>"));
this.Controls.Add(new LiteralControl("<Td>"));
this.Controls.Add(new LiteralControl("<Strong>"));
this.Controls.Add(new LiteralControl("Link Name"));
this.Controls.Add(new LiteralControl("</Strong>"));
this.Controls.Add(new LiteralControl("</Td>"));
this.Controls.Add(new LiteralControl("</Tr>"));
foreach (SPListItem item in myColl)
{
string strHyperLInkTitle = string.Empty;
string strHyperLinkURL = string.Empty;
strHyperLInkTitle = item["HyperLinkTitle"].ToString();
strHyperLinkURL = item["URL"].ToString();
this.Controls.Add(new LiteralControl("<Tr>"));
this.Controls.Add(new LiteralControl("<Td>"));
this.Controls.Add(new LiteralControl("<A href='"+strHyperLinkURL+"'>"+strHyperLInkTitle+"</A>"));
this.Controls.Add(new LiteralControl("</Td>"));
this.Controls.Add(new LiteralControl("</Tr>"));
}
this.Controls.Add(new LiteralControl("<Table>"));
}
}
}
}
}

Easy Way to Implement Ajax in SharePoint 2007 with UserControl.

Implementation of Ajax in SharePoint

·         First create one asp.net Ajax website.  You will get Ajax entries in web.config. fill the relevant sections of SharePoint Web.config carefully.

·         Copy ajaxcontroltookit dll to your bin folder.

·         Now copy the ajaxcontroltookit safe control to your SharePoint Web.config.

·         Now open your SharePoint site in SharePoint Designer.

·         Do as it is as the above thing.

·         Now add the register reference tab as below for Ajax Control Toolkit like this.

·         <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>

·         Now add ScriptManager after the form tag within a Master Page. Add this as below.

·           <ajaxToolkit:ToolkitScriptManager ID="ToolkitScriptManager1" RunAt="Server" />

·         Now take a user control and place an update panel in that and place a grid inside the content template of update panel.

·         Now write your logic in ascx.cs file as shown below.

Ajax Ascx Page

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="AjaxWebUserControl.ascx.cs" Inherits="AjaxWebUserControl" %>

<%@ Register Assembly="AjaxControlToolkit, Version=1.0.20229.20821, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e"

    Namespace="AjaxControlToolkit" TagPrefix="cc1" %>

<asp:UpdatePanel ID="up1" runat="server" UpdateMode="Conditional">

<ContentTemplate>

    <asp:GridView ID="dgvTasks" runat="server" AutoGenerateColumns="False" CellPadding="4" PageSize="10"

        ForeColor="#333333" GridLines="Both" AllowPaging="True" OnPageIndexChanging="dgvTasks_PageIndexChanging">

        <RowStyle BackColor="#FFFBD6" ForeColor="#333333" />

        <Columns>

            <asp:BoundField DataField="Title" HeaderText="Title" />

            <asp:BoundField DataField="Status" HeaderText="Status" />

            <asp:BoundField DataField="Priority" HeaderText="Priority" />

        </Columns>

        <FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />

        <PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />

        <SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />

        <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />

        <AlternatingRowStyle BackColor="White" />

    </asp:GridView>

</ContentTemplate>

</asp:UpdatePanel>

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using Microsoft.SharePoint;

using System.Security;

public partial class AjaxWebUserControl : System.Web.UI.UserControl

{

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            fillGrid();

        }

    }

    public void fillGrid()

    {

        SPSecurity.RunWithElevatedPrivileges(delegate()

        {

            SPWeb currentWeb = SPContext.Current.Web;

            using (SPSite site = new SPSite(currentWeb.Url))

            {

                using (SPWeb objWeb = site.OpenWeb())

                {

                    SPList lstTasks = objWeb.Lists["Tasks"];

                    SPListItemCollection myColl = lstTasks.Items;

                    if (myColl.Count > 0)

                    {

                        dgvTasks.DataSource = myColl.GetDataTable();

                        dgvTasks.DataBind();

                    }

                }

            }

        });

    }

    protected void dgvTasks_PageIndexChanging(object sender, GridViewPageEventArgs e)

    {

        dgvTasks.PageIndex = e.NewPageIndex;

        fillGrid();

    }

}

Adding Ajax User Control to a WebPart.

using System;

using System.Runtime.InteropServices;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Serialization;

using System.Security;

using Microsoft.SharePoint;

using Microsoft.SharePoint.WebControls;

using Microsoft.SharePoint.WebPartPages;

using System.Web.Extensions;

[assembly:AllowPartiallyTrustedCallers]

namespace UserControlSample

{

    [Guid("ee10f4a4-4126-4350-967e-e49ea40ee7c7")]

    public class UserControlSample : System.Web.UI.WebControls.WebParts.WebPart

    {

        string strError = string.Empty;

        Control MyControl;

        public UserControlSample()

        {

        }

        protected override void Render(HtmlTextWriter writer)

        {

            writer.Write(strError);

            try

            {

                    MyControl.RenderControl(writer);

               

            }

            catch (Exception ex)

            {

                writer.Write(ex.ToString());

            }

        }

       

        protected override void CreateChildControls()

        {

            try

            {

               

                EnsurePanelFix();

                this.Controls.Clear();

                MyControl = this.Page.LoadControl("\\_LAYOUTS\\Custom UserControls\\AjaxWebUserControl.ascx");

                MyControl.ID = "myControl";

                this.Controls.Add(MyControl);

            }

            catch (Exception ex)

            {

                strError += ex.ToString();

            }

        }

        private void EnsurePanelFix()

        {

            ScriptManager.RegisterStartupScript

              (this,

               typeof(Control),

               "UpdatePanelFixup",

               "_spOriginalFormAction = document.forms[0].action; _spSuppressFormOnSubmitWrapper=true;",

               true);

        }

    }

}