server error in '/' application.

不能使用 '';文件已在使用中。

description: an unhandled exception occurred during the execution of the current web request. please review the stack trace for more information about the error and where it originated in the code.

exception details: system.exception: 不能使用 '';文件已在使用中。

source error:

line 521:line 522:	templatebuilder.append("\">" + utils.objecttostr(dr2["title"]) + "</a></p>\r\n															");line 523:	datatable lmlb2=get_category_child_list("news", utils.strtoint(utils.objecttostr(dr2["id"]), 0));line 524:line 525:	foreach(datarow dr3 in lmlb2.rows)

source file: e:\学校网站\aspx\main\news_list.aspx    line: 523

stack trace:

[exception: 不能使用 '';文件已在使用中。]  dtcms.dbutility.dbhelperoledb.query(string sqlstring) in d:\net\双中实验校源码\dtcms.dbutility\dbhelperoledb.cs:353  dtcms.dal.article_category.getchildlist(int32 parent_id, int32 channel_id) in d:\net\双中实验校源码\dtcms.dal\article_category.cs:511  dtcms.bll.article_category.getchildlist(int32 parent_id, string channel_name) in d:\net\双中实验校源码\dtcms.bll\article_category.cs:95  dtcms.web.ui.basepage.get_category_child_list(string channel_name, int32 parent_id) in d:\net\双中实验校源码\dtcms.web.ui\label\category.cs:70  asp.aspx_main_news_list_aspx.oninit(eventargs e) in e:\学校网站\aspx\main\news_list.aspx:523  system.web.ui.control.initrecursive(control namingcontainer) +134  system.web.ui.page.processrequestmain(boolean includestagesbeforeasyncpoint, boolean includestagesafterasyncpoint) +489


version information: microsoft .net framework version:4.0.30319; asp.net version:4.0.30319.34209