C# 将数据表导出到Excel通用方法

DataGrid dg = new DataGrid();
dg.DataSource = dt;
dg.DataBind();
Response.Clear();
Response.Buffer = true;
Response.Charset = "GB2312";
Response.AppendHeader("Content-Disposition", "attachment;filename=" + Server.UrlEncode("分省分批次成绩统计.xls"));
Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文
Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。
this.EnableViewState = false;
System.Globalization.CultureInfo myCItrad = new System.Globalization.CultureInfo("ZH-CN", true);
System.IO.StringWriter oStringWriter = new System.IO.StringWriter(myCItrad);
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
dg.RenderControl(oHtmlTextWriter);
Response.Write(oStringWriter.ToString());
Response.End();