计算机编程语言及互联网运维技术的学习难点与技术资料查询网站-语言吧

ADO.NET是微软公司提供的一款全新的数据库访问技术，是在.NET Framework中负责数据访问的类库集；可以将ADO.NET比喻为数据库应用程序和数据源之间的桥梁，提供了一个面向对象的数据访问架构；...
1. 当有一个不吻合页面元素的尺寸时有时候图片并不都是这么完美的适合你所需要的场景，比如美工给了一套比较大的Css Sprite：实际上你并不需要这么大的图标，比如你需要图标的地方大概是55px * 50px：892运行结果：可以看出来此时由于图标远比盒子大，所以只显示出了一个角，正所谓小荷才露尖尖...
目前采用的方法是修改CrawlerHandler 中Fetch()方法，在其中增加了文件后缀名的检测,借由上传网络图片功能中可传递可执行文件。后台代码中只做了文件类型的检测未能正确的拦截掉非法文件。...
菜单是页面必不可少的元素，我们希望它是通用的，所以在结构上，它的组成极其灵活。而事实上，在基础菜单还没有正式推出之前，垂直导航（layui-nav-tree）曾顶替了它的角色，尤其是在管理系统中发挥了举足轻重的作用。...
为解决新浏览器下上传图片预览与统一上传的功能，好得很CMS(HDHCMS)根据系统开发的实际情况，开发了多图选择自增并生成BASE64编码，希望能帮到大家。...
C# XML与Json之间相互转换实例详解...
通过IP地址获取城市的接口大全，有淘宝获取接口等...
最近在研究MVC4，使用vs2010，开发的站点在发布和部署到iis7上的过程中遇到了很多问题，现在将解决的过程记录下来，以便日后参考，整个过程主要以截图形式呈现 vs2010的安装和mvc4的安装不在本次记录之列，主要记录网站发布和iis的部署...
如何解决:对应的服务器 tls 为 tls 1.0,小程序要求的TLS版本必须大于等于1.2问题...
这节课我们把案例放在最前面，供大家直接观看效果。这么做的原因一方面是考虑到有些同学可能前面都没看完，直接就翻到最后一节看看写的是什么。另一方面是本节课案例较为复杂，防止大家看的晕了就不想继续往下看了，所以先把例子直接放在前面： 1. 定义条形Css Sprite动画/* 清除浏览器默认边距...

JS获取url中query_str JavaScript RegExp 正则表达式基础详谈

JS获取url中query_str JavaScript RegExp 正则表达式基础详谈...

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MSSQL存储过程的调试指南及调试方法

“MSSQL存储进程调试指南”，很多人可能感到困扰。虽然 SQL 语句可以很方便地被简单封装以便快速运行，从而解放双手，但存储进程的开发和调试多是一项枯燥的任务，如果不恰当的调试技能，可能会影响数据库的性能。...

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c# list string 转json

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C#开发者的Redis入门指南

Redis是一个高性能的内存数据库，常用于缓存、队列、实时数据分析等场景。作为一个C#开发者，了解如何使用Redis可以为你的应用程序带来巨大的好处。本文将向你介绍Redis基本概念，并提供一些C#的代码示例来帮助你入门。...

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页面中内部DIV让点击外部DIV的JS 事件不发生（阻止冒泡事件）

...

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JS在DIV中获取坐标点位置，并将点击后的点进行连接的源码

JS在DIV中获取坐标点位置，并将点击后的点进行连接的源码...

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拾取坐标-百度地图API-HDHCMS收集

拾取坐标-百度地图API-HDHCMS收集...

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ORA-12814: only one CACHE or NOCACHE clause may be specified ORACLE 报错

ORA-12814: only one CACHE or NOCACHE clause may be specifiedCause: CACHE was specified more than once, NOCACHE was specified more than o......

阅读:26次

ORA-53070: manifest file:string does not contain all the Oracle documents ORACLE 报错

ORA-53070: manifest file:string does not contain all the Oracle documentsCause: The specified manifest file did not contain the complete......

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ORA-23409: could not find an unused refresh group number ORACLE 报错

ORA-23409: could not find an unused refresh group numberCause: 1000 consecutive refresh group numbers, as defined by the rgroupseq numbe......

阅读:18次

ORA-25205: the QUEUE string.string does not exist ORACLE 报错

ORA-25205: the QUEUE string.string does not existCause: The specified queue does not exist.Action: Create the queue first before specify......

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MySQL Error number: 3575; Symbol: ER_CTE_RECURSIVE_FORBIDS_AGGREGATION; SQLSTATE: HY000 报错

Error number: 3575; Symbol: ER_CTE_RECURSIVE_FORBIDS_AGGREGATION; SQLSTATE: HY000Message: Recursive Common Table Expression '%s' can con......

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MySQL Error number: MY-010087; Symbol: ER_FT_BOOL_SYNTAX_INVALID; SQLSTATE: HY000 报错

Error number: MY-010087; Symbol: ER_FT_BOOL_SYNTAX_INVALID; SQLSTATE: HY000Message: Invalid ft-boolean-syntax string: %s错误说明：MY-010087; ......

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ORA-25113: GLOBAL may not be used with a bitmap index ORACLE 报错

ORA-25113: GLOBAL may not be used with a bitmap indexCause: An attempt was made to create a bitmap index using the GLOBAL option.Action:......

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ORA-15077: could not locate ASM instance serving a required diskgroup ORACLE 报错

ORA-15077: could not locate ASM instance serving a required diskgroupCause: The instance failed to perform the specified operation becau......

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ORA-06750: TLI Driver: sync failed ORACLE 报错

ORA-06750: TLI Driver: sync failedCause: The ORACLE process started by the TLI server was unable to synchronize its inherited connection......

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ORA-13629: The task or object string is being used by another operation. ORACLE 报错

ORA-13629: The task or object string is being used by another operation.Cause: The user attempted to access a task or object that is loc......

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ORA-07802: slbtpd: overflow while converting to packed decimal ORACLE 报错

ORA-07802: slbtpd: overflow while converting to packed decimalCause: An impossible request for binary to decimal conversion was madeActi......

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ORA-30161: A system error occurred during the OCIFile function call ORACLE 报错

ORA-30161: A system error occurred during the OCIFile function callCause: A system error occured while executing the OCIFile function.Ac......

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MySQL Error number: 3863; Symbol: ER_CLONE_PROTOCOL; SQLSTATE: HY000 报错

Error number: 3863; Symbol: ER_CLONE_PROTOCOL; SQLSTATE: HY000Message: Clone received unexpected response from Donor : %s.错误说明ER_CLONE_P......

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ORA-22972: NULL value not allowed in PRIMARY KEY-based object identifier ORACLE 报错

ORA-22972: NULL value not allowed in PRIMARY KEY-based object identifierCause: A value constituting the PRIMARY KEY-based object identif......

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MySQL Error number: 3692; Symbol: ER_REGEXP_BAD_INTERVAL; SQLSTATE: HY000 报错

Error number: 3692; Symbol: ER_REGEXP_BAD_INTERVAL; SQLSTATE: HY000Message: Incorrect description of a {min,max} interval.：错误说明：ER_REGEX......

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ORA-13717: Tuning Package License is needed for using this feature. ORACLE 报错

ORA-13717: Tuning Package License is needed for using this feature.Cause: The specified value for system parameter CONTROL_MANAGEMENT_PA......

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MySQL Error number: MY-013253; Symbol: ER_IB_MSG_FAIL_TO_SAVE_SPACE_STATE; SQLSTATE: HY000 报错

Error number: MY-013253; Symbol: ER_IB_MSG_FAIL_TO_SAVE_SPACE_STATE; SQLSTATE: HY000Message: %s Unable to save the current state of tabl......

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ORA-28604: table too fragmented to build bitmap index (string,string,string) ORACLE 报错

ORA-28604: table too fragmented to build bitmap index (string,string,string)Cause: The table has one or more blocks that exceed the maxi......

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ORA-31650: timeout waiting for master process response ORACLE 报错

ORA-31650: timeout waiting for master process responseCause: After creating the job infrastructure and sending the initial message to th......

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ORA-31078: error in SQL mapping information ORACLE 报错

ORA-31078: error in SQL mapping informationCause: There is an error in the SQL type and table specification within the XML Schema.Action......

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ORA-28591: agent control utility: unable to access parameter file ORACLE 报错

ORA-28591: agent control utility: unable to access parameter fileCause: The agent control utility was unable to access its parameter fil......

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MySQL Error number: MY-010622; Symbol: ER_NDB_MISMATCH_IN_FRM_DISCOVERING; SQLSTATE: HY000 报错

Error number: MY-010622; Symbol: ER_NDB_MISMATCH_IN_FRM_DISCOVERING; SQLSTATE: HY000Message: NDB: mismatch in frm for %s.%s, discovering......

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ORA-48128: opening of a symbolic link is disallowed ORACLE 报错

ORA-48128: opening of a symbolic link is disallowedCause: An error was encountered when attempting to open a file that is a symbolic lin......

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ORA-29477: SQL statement size in bytes is too big ORACLE 报错

ORA-29477: SQL statement size in bytes is too bigCause: The size of the SQL statement exceeded 4 gigabytes -1.Action: Reduce the size of......

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MySQL Error number: MY-012986; Symbol: ER_IB_MSG_1161; SQLSTATE: HY000 报错

Error number: MY-012986; Symbol: ER_IB_MSG_1161; SQLSTATE: HY000Message: %s错误说明MySQL错误编号 ER_IB_MSG_1161 (MY-012986) 对应的SQLSTATE为 HY000，表......

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MySQL Error number: MY-012560; Symbol: ER_IB_MSG_735; SQLSTATE: HY000 报错

Error number: MY-012560; Symbol: ER_IB_MSG_735; SQLSTATE: HY000Message: The log sequence number %llu in the system tablespace does not m......

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MySQL Error number: MY-012329; Symbol: ER_IB_MSG_504; SQLSTATE: HY000 报错

Error number: MY-012329; Symbol: ER_IB_MSG_504; SQLSTATE: HY000Message: %s错误说明系统错误编号 MY-012329; 对应Symbol为ER_IB_MSG_504，SQLSTATE为 HY000，该......

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MySQL Error number: MY-012478; Symbol: ER_IB_MSG_653; SQLSTATE: HY000 报错

Error number: MY-012478; Symbol: ER_IB_MSG_653; SQLSTATE: HY000Message: %sMY-012478（ER_IB_MSG_DDL_LOG_DELETE_BY_ID_OK）是MySQL发生的一个表示删除日志条......

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MySQL Error number: 3506; Symbol: ER_INVALID_DD_OBJECT; SQLSTATE: HY000 报错

Error number: 3506; Symbol: ER_INVALID_DD_OBJECT; SQLSTATE: HY000Message: %s dictionary object is invalid. (%s)错误说明：MySQL的ER_INVALID_DD_......

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ORA-39040: Schema expression “string” must identify exactly one schema. ORACLE 报错

ORA-39040: Schema expression 'string' must identify exactly one schema.Cause: For TABLE mode jobs, the SCHEMA_EXPR filter must identify ......

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ORA-28281: Global application context is not updated on one or more Oracle RAC instances ORACLE 报错

ORA-28281: Global application context is not updated on one or more Oracle RAC instancesCause: While updating global application context......

阅读:19次

ORA-12441: policy string already exists ORACLE 报错

ORA-12441: policy string already existsCause: You tried to create a policy with the same name as an existing one.Action: Use a different......

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ORA-13636: The specified value provided for parameter string is not valid for this advisor. ORACLE 报

ORA-13636: The specified value provided for parameter string is not valid for this advisor.Cause: The user supplied an invalid parameter......

阅读:17次

ORA-27095: fail to get the disk sector size ORACLE 报错

ORA-27095: fail to get the disk sector sizeCause: The system call to get the sector size failed. Additional information indicates which ......

阅读:20次

MySQL Error number: MY-010157; Symbol: ER_LOG_FILE_INVALID; SQLSTATE: HY000 报错

Error number: MY-010157; Symbol: ER_LOG_FILE_INVALID; SQLSTATE: HY000Message: Invalid value for %s: %sMySQL错误号MY-010157，Symbol：ER_LOG_FI......

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ORA-13530: invalid TOPNSQL string, must be in the range (string, string) ORACLE 报错

ORA-13530: invalid TOPNSQL string, must be in the range (string, string)Cause: The user has specified a TOPNSQL setting that is not in t......

阅读:20次

ORA-12476: least upper bound resulted in an invalid OS label ORACLE 报错

ORA-12476: least upper bound resulted in an invalid OS labelCause: You tried to do an operation that generated a least upper bound (LUB)......

阅读:20次

ORA-12235: TNS:Failure to redirect to destination ORACLE 报错

ORA-12235: TNS:Failure to redirect to destinationCause: This error is reported by an interchange which fails to redirect a connection to......

阅读:18次

ORA-26004: Tables loaded through the direct path may not be clustered ORACLE 报错

ORA-26004: Tables loaded through the direct path may not be clusteredCause: User attempted to load a clustered table via the direct path......

阅读:19次

ORA-12411: invalid label value ORACLE 报错

ORA-12411: invalid label valueCause: The specified label value does not exist.Action: Check the data dictionary views for the policy to ......

阅读:16次

MySQL Error number: MY-010744; Symbol: ER_PLUGIN_OOM; SQLSTATE: HY000 报错

Error number: MY-010744; Symbol: ER_PLUGIN_OOM; SQLSTATE: HY000Message: Out of memory for plugin '%s'.MySQL错误MY-010744，也称为 ER_PLUGIN_OOM......

阅读:18次

ORA-29388: plan/consumer_group string is part of more than one top-plan ORACLE 报错

ORA-29388: plan/consumer_group string is part of more than one top-planCause: An attempt was made to delete a subtree that includes a pl......

阅读:17次

ORA-54029: Virtual column cannot be updated in trigger body ORACLE 报错

ORA-54029: Virtual column cannot be updated in trigger bodyCause: Attempted to change the value of virtual column in a trigger body'Acti......

阅读:17次

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