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pbootcms模板导航调用方法

 pbootcms模板导航调用方法:1、导航菜单列表 {pboot:nav}<ahref="[nav:link]">[nav:name]</a>{/pboot:nav}2、二级嵌套 {pboot:nav}<ahref="[nav:link]">[nav:...

pbootcms后台左边菜单修改

第一种:直接后台链接操作超级管理后台登录后台,手动访问这个链接(你的后台登录地址/Menu/index)打开菜单列表,找到系统管理-系统菜单点击状态启用,接着去重新登录后即可。注意:截图里用的是默认后台登录地址域名/admin.php,根据实际情况输入。下图位置启用系统菜单第二种:通过修改数据库修改数据库表ay_men...

pbootcms后台上传附件报错UNKNOW: Code: 8192

pbootcms后台上传附件报错UNKNOW:Code:8192;Desc:stripos(),,意思是上未知错误代码8192。解决方法:打开/core/function/file.php文件找到/if(stripos($types,$ext)!==false)复制改为/if(stripos($types,chr($e...

ORA-41712: missing groupby specification for the collection “string”

文档解释ORA-41712:missinggroupbyspecificationforthecollection“string”Cause:Anattemptwasmadetouseacollectionelementwithnogroupbyspecificationintherulecon...

ORA-41688: invalid value for the “groupby” attribute

文档解释ORA-41688:invalidvalueforthe“groupby”attributeCause:Aninvalidvaluewasspecifiedforthe“groupby”attribute.Action:Correcttheinputandtrya...

ORA-12855: cannot run parallel or insert direct load in a loopback

文档解释ORA-12855:cannotrunparallelorinsertdirectloadinaloopbackCause:Aloopbackwascreatedinthetransactionbeforethisoperation.Action:Donotuseloopbackwhenusingpdmlori...

ORA-12856: cannot run parallel query on a loopback connection

文档解释ORA-12856:cannotrunparallelqueryonaloopbackconnectionCause:Atableorindexinaparallelqueryisreferencedviaaloopbackconnection.Action:Donotuseloopbackconnection...

ORA-41687: attribute “string” not allowed in the “groupby” specification

文档解释ORA-41687:attribute“string”notallowedinthe“groupby”specificationCause:Theattributeslistedinthe“groupby”specificationinar...

ORA-27196: skgfpbk: sbtpcbackup returned error

文档解释ORA-27196:skgfpbk:sbtpcbackupreturnederrorCause:sbtpcbackupreturnedanerror.Thishappenswhenaproxybackupisbegun.Action:Thiserrorisreturnedfromthemediamanageme...

ORA-02725: osnpbr: cannot send break signal

文档解释ORA-02725:osnpbr:cannotsendbreaksignalCause:ThePipedrivercouldnotsendabreakmessagetotheORACLEshadowprocess.Action:Killsystemcallfailed.Checkerrnoandcontactc...

ORA-09777: osnpbr: cannot send break message

文档解释ORA-09777:osnpbr:cannotsendbreakmessageCause:ThepipedrivercouldnotsendabreakmessagetotheORACLEshadowprocessbreakthread.Action:Internalerror.Contactyourcusto...

ORA-02724: osnpbr: cannot send break message to orapop

文档解释ORA-02724:osnpbr:cannotsendbreakmessagetoorapopCause:ThePipedrivercouldnotsendabreakmessagetoorapop.Action:Contactyourcustomersupportrepresentative.ORA-0272...

MySQL Error number: 3871; Symbol: ER_CLONE_LOOPBACK; SQLSTATE: HY000

文档解释Errornumber:3871;Symbol:ER_CLONE_LOOPBACK;SQLSTATE:HY000Message:Clonecannotuseloopbackconnectionwhilecloningintocurrentdatadirectory.左右错误说明ER_CLONE_LOOPBACK...
IT技术学习 ·2023-06-17

C# Linq GroupBy 使用 new 能按值比较进行分组吗?

C#中:list.GroupBy(m => new { m.Id, m.Name });如上,分组使用了new,也就是创建了对象,而我们知道对象是按地址比较的,是不是这种分组就起不到分组作用了?不是,照样能按Id和Name分组。new不会影响分组,仅仅是...

C# Linq 去重-GroupBy、Select 巧对类去重

C#Linq去重-Select、Distinct对唯一性的认定C#Linq去重-GroupBy、Select巧对类去重假设我们从数据库表中读取了值,存在类中,由于不断地读取、添加,可能造成重复,我们的规则是Id重复,则重复,如何利用Linq快速去重呢?看代码public class C{public...
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