EXCEL在打开后如何能实现页面设置为横项

我有一个软件，一点击就激活EXCEL，立即就打开了EXCEL，里面有数据，但是是纵向的，我想怎么样才能一激活EXCEL后，数据就是横向的

打开EXCEL,点窗口左上角上的文件,再打开页面设置,再设置成横向就OK了

导出excel打印 private void imagebutton1_click(object sender, system.web.ui.imageclickeventargs e) { response.clear(); response.buffer= true; response.appendheader( "content-disposition ", "attachment;filename=borrow.xls "); response.contentencoding=system.text.encoding.getencoding( "gb2312 "); response.contenttype = "application/ms-excel "; 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); table3.rendercontrol(ohtmltextwriter); response.charset= "gb2312 "; response.write(ostringwriter.tostring()); response.end(); }