按照网上的方法:
Response.Clear();
Response.Buffer = true;
Response.Charset = "GB2312";
Response.AppendHeader("Content-Disposition", "attachment;filename=test.xls");
Response.ContentEncoding = System.Text.Encoding.UTF7;
Response.ContentType = "application/ms-excel"; 
System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
gvtest.RenderControl(oHtmlTextWriter); 
Response.Output.Write(oStringWriter.ToString());
Response.Flush();
Response.End();
对于单个的gridView可以实现,但如果是两个gridview嵌套的话,子gridview里面的内容就无法导入到excel里面,请问有没有人碰到类似的情况,还望指教!