Modifying datagrid OnItemCreated event

aspx UI:
 
<asp:DataGrid id="dg" 
                                runat="server"
	                            BackColor="beige"
	                            CellPadding="5"
	                            Style="font-family:verdana;font-size:8pt" 
	                            Width="700px" 
	                            AllowPaging="true"
                                OnItemCreated="dg_ItemCreated" 
                                AllowSorting="true">
	                            <AlternatingItemStyle BackColor="#eeeeee"/>
	                            <HeaderStyle BackColor="ivory" Font-Bold="true"/>
                            </asp:DataGrid> 
 
 
code-behind:
 
protected void dg_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e )
    {
        if (e.Item.ItemType == ListItemType.Pager)
        {
            e.Item.Cells[0].Text = "";
            e.Item.Cells[0].Attributes.Add("colspan", "6");
 
            Button btnFirst = new Button();
            btnFirst.Text = "First";
            btnFirst.Style.Add("width", "50px");
            btnFirst.CausesValidation = false;
            e.Item.Controls[0].Controls.AddAt(0, btnFirst);
            btnFirst.Click += new EventHandler(btnFirst_Click);
 
            Button btnPrevious = new Button();
            btnPrevious.Text = "Previous";
            btnPrevious.Style.Add("width", "75px");
            btnPrevious.CausesValidation = false;
            e.Item.Controls[0].Controls.AddAt(1, btnPrevious);
            btnPrevious.Click += new EventHandler(btnPrevious_Click);
 
            Button btnNext = new Button();
            btnNext.Text = "Next";
            btnNext.Style.Add("width", "50px");
            btnNext.CausesValidation = false;
            e.Item.Controls[0].Controls.AddAt(2, btnNext);
            btnNext.Click += new EventHandler(btnNext_Click);
 
            Button btnLast = new Button();
            btnLast.Text = "Last";
            btnLast.Style.Add("width", "50px");
            btnLast.CausesValidation = false;
            e.Item.Controls[0].Controls.AddAt(3, btnLast);
            btnLast.Click += new EventHandler(btnLast_Click);
 
            e.Item.Cells[0].HorizontalAlign = HorizontalAlign.Center;
 
        }  
    }
 
    protected void btnPrevious_Click(object sender, EventArgs e)
    {
        int NewPage = dg.CurrentPageIndex - 1;
        if (NewPage <= dg.PageCount && NewPage >= 0)
        {
            dg.CurrentPageIndex = NewPage;
            AuthenticateGA_API();
            dg.DataSource = GetCityReport();
            dg.DataBind();
        }
    }
 
    protected void btnNext_Click(object sender, EventArgs e)
    {
        int NewPage = dg.CurrentPageIndex + 1;
        if (NewPage < dg.PageCount)
        {
            dg.CurrentPageIndex = NewPage;
            AuthenticateGA_API();
            dg.DataSource = GetCityReport();
            dg.DataBind();
        }
    }
 
    protected void btnLast_Click(object sender, EventArgs e)
    {
        int LastPage = dg.PageCount - 1;
        if (LastPage < dg.PageCount)
        {
            dg.CurrentPageIndex = LastPage;
            AuthenticateGA_API();
            dg.DataSource = GetCityReport();
            dg.DataBind();
        }
    }
 
    protected void btnFirst_Click(object sender, EventArgs e)
    {
        int CurrentPage = dg.CurrentPageIndex;
        int FirstPage = CurrentPage - CurrentPage;
        if (FirstPage == 0)
        {
            dg.CurrentPageIndex = FirstPage;
            AuthenticateGA_API();
            dg.DataSource = GetCityReport();
            dg.DataBind();
        }
    }

                                              

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