server error in '/' application.

不能打开数据库 ''。应用程序可能无法识别该数据库,或文件可能损坏。

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: 不能打开数据库 ''。应用程序可能无法识别该数据库,或文件可能损坏。

source error:

line 89: line 90: 	templatebuilder.append("\" class=\"aa\">" + utils.objecttostr(dr["title"]) + "</a>\r\n							<ul>\r\n								");line 91: 	datatable dt2=get_category_child_list("news", utils.strtoint(utils.objecttostr(dr["id"]), 0));line 92: line 93: 	foreach(datarow dr2 in dt2.rows)

source file: e:\学校网站\aspx\main\news_show.aspx    line: 91

stack trace:

[exception: 不能打开数据库 ''。应用程序可能无法识别该数据库,或文件可能损坏。]  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_show_aspx.oninit(eventargs e) in e:\学校网站\aspx\main\news_show.aspx:91  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