Exporting grid to excel in sandbox solution

Hello ,
Please try this,
Button: <asp:button runat="server" id="btnExport" text="Export" onclick="btnExport_Click" onclientclick="_spFormOnSubmitCalled=false;_spSuppressFormOnSubmitWrapper=true;" xmlns:asp="#unknown">

Button Click Event:
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.AddHeader("content-disposition", string.Format("attachment; filename=Download.xls"));
HttpContext.Current.Response.ContentType = "application/ms-excel";
using (StringWriter writer = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(writer))
{
Table table = new Table();
table.GridLines = myGrid.GridLines;
if (myGrid.HeaderRow != null)
{
table.Rows.Add(myGrid.HeaderRow);
}

foreach (GridViewRow row in myGrid.Rows)
{
table.Rows.Add(row);
}
table.RenderControl(htw);
HttpContext.Current.Response.Write(writer.ToString());
HttpContext.Current.Response.End();
}
}

The Sandbox lives in it's own process and the HttpContext.Current is different from the HttpContext.Current in ASP.NET (that lives in IIS and the W3WP.exe process).

It's not possible to use the solution for export to excel from grid.