Bindings Top five Announcements to SpGridView without a Single line of Loop

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.Text;
using System.Data;
[assembly:AllowPartiallyTrustedCallers]
namespace SampleWebPart1
{
    [Guid("64f3abf3-d56d-40d1-8847-2aa74a6612ad")]
    public class SampleWebPart1 : System.Web.UI.WebControls.WebParts.WebPart
    {
        public SampleWebPart1()
        {
        }
        SPGridView sgvAnnouncements;
        string strError = string.Empty;
        protected override void Render(HtmlTextWriter writer)
        {
            writer.Write(strError);
            try
            {
                sgvAnnouncements.RenderControl(writer);
            }
            catch (Exception ex)
            {
                writer.Write(ex.ToString());
            }
        }
        protected override void CreateChildControls()
        {
            try
            {
                sgvAnnouncements = new SPGridView();
                sgvAnnouncements.ID = "sgvAnnouncements";
                sgvAnnouncements.AutoGenerateColumns = false;
                this.Controls.Add(sgvAnnouncements);

                BoundField bTitle = new BoundField();
                bTitle.HeaderText = "Title";
                bTitle.DataField = "Title";
                sgvAnnouncements.Columns.Add(bTitle);

                BoundField bCreatedBy = new BoundField();
                bCreatedBy.HeaderText = "Created By";
                bCreatedBy.DataField = "Author";
                sgvAnnouncements.Columns.Add(bCreatedBy);

                SPSecurity.RunWithElevatedPrivileges(delegate()
                {
                    SPWeb currentWeb = SPContext.Current.Web;
                    SPQuery sQuery = new SPQuery();
                    sQuery.Query = "<OrderBy><FieldRef Name='ID' Ascending='False' /></OrderBy><Where><Geq><FieldRef Name='Expires' /><Value Type='DateTime'><Today /></Value></Geq></Where>";
                    sQuery.RowLimit = 5;
                    SPList lstAnnouncements = currentWeb.Lists["Announcements"];
                    SPListItemCollection myColl = lstAnnouncements.GetItems(sQuery);
                    if (myColl.Count > 0)
                    {
                        sgvAnnouncements.DataSource = myColl.GetDataTable();
                        sgvAnnouncements.DataBind();
                    }
                });
            }
            catch (Exception ex)
            {
                strError += ex.ToString();
            }



        }
    }
}