asp.net 导出Excel

分享一个asp.net 导出假Excel代码。优点，不用借助于任何插件比如（NPOI）,复制代码，修改grid.DataSource直接导出。

先看导出后的效果图

System.Web.UI.WebControls.DataGrid grid = new DataGrid();
                grid.CellSpacing = 6;
                grid.CellPadding = 6;
                grid.EnableViewState = false;
                grid.DataSource = tableCars;
                grid.DataBind();
                foreach (DataGridColumn clos in grid.Columns)
                {
                    clos.HeaderStyle.Width = 200;
                    clos.ItemStyle.Width = 200;
                }
                System.IO.StringWriter tw = new System.IO.StringWriter();
                HtmlTextWriter hw = new HtmlTextWriter(tw);
                grid.RenderControl(hw);
                string fileName = System.Web.HttpUtility.UrlEncode(DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls", System.Text.Encoding.UTF8);
                HttpContext.Current.Response.Charset = "utf-8";
                HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;
                HttpContext.Current.Response.ContentType = "application/ms-excel";
                HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName);
                HttpContext.Current.Response.Write(tw.ToString());
                HttpContext.Current.Response.End();