asp.net  更新数据时报错：Database operation expected to affect 1 row(s) but actually affected 0 row(s). Data may have been modified or deleted since entities were loaded

原因：Check your object, does it pass Primary Key Null. This Exception is Generally due this reason only.

对象的主键为空，导致不能更新，检查你要更新的对象，查看主键是否为空，或0

Database operation expected to affect 1 row(s) but actually affected 0 row(s). Data may have been modified or deleted since entities were loaded的更多相关文章

  1. 记录在EF Core级联更新时出现的错误The database operation was expected to affect 1 row(s), but actually affected 0 row(s) （低级错误导致）

    错误提示:The database operation was expected to affect 1 row(s), but actually affected 0 row(s); data ma ...

  2. DataTables warning : Requested unknown parameter '0' from the data source for row 0错误

    在做datatables的项目,从后台取得数据后,返回给datatables界面时会报下面的错误: DataTables warning : Requested unknown parameter ' ...

  3. Mysql [Err] 1118 - Row size too large. The maximum row size for the used table type, not counting BLOBs, is 65535.

    对于越来越多的数据,数据库的容量越来越大,压缩也就越来越常见了.在我的实际工作中进行过多次压缩工作,也遇到多次问题,在此和大家分享一下. 首先,我们先说说怎么使用innodb的压缩. 第一,mysql ...

  4. 安装Access Database Engine后，提示未注册Microsoft.ACE.OLEDB.12.0

    未注册Microsoft.ACE.OLEDB.12.0 ,下载安装 Microsoft Access Database Engine:https://www.microsoft.com/en-us/d ...

  5. DataTables warning (table id = 'myTable'): Requested unknown parameter '0' from the data source for row 0

    第一种方式:不用在js里设置列Html: <table id="myTable"> <thead> <tr> <th>Title-1 ...

  6. Attempting to write a row[5] in the range [0,394] that is already written to disk.

    我用POI操作excel写数据,然后就报这个错了 XSSFWorkbook workbook = new XSSFWorkbook(); SXSSFWorkbook sxssfWorkbook = n ...

  7. [ERR] 1118 - Row size too large (> 8126). Changing some columns to TEXT or BLOB may help. In current row format, BLOB prefix of 0 bytes is stored inline.

    昨天,在测试新的数据库时,迁移表遇到了这个问题.现在记录一下解决方案. 1.在配置文件中添加关闭严格模式的配置:sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS ...

  8. EntityFramework Core解决并发详解

    前言 对过年已经无感,不过还是有很多闲暇时间来学学东西,这一点是极好的,好了,本节我们来讲讲EntityFramewoek Core中的并发问题. 话题(EntityFramework Core并发) ...

  9. Professional C# 6 and .NET Core 1.0 - 38 Entity Framework Core

    本文内容为转载,重新排版以供学习研究.如有侵权,请联系作者删除. 转载请注明本文出处:Professional C# 6 and .NET Core 1.0 - 38 Entity Framework ...

随机推荐

  1. request内置对象

    request内置对象(JSP九大内置对象之一)简述:内置对象即已在容器内部创建完成,可以直接调用的对象.容器在接收到客户端的请求后会创建一个对象用于处理请求信息,该对象就是内置对象(属于“javax ...

  2. - configuration.module has an unknown property 'loader' 问题解决

    错误提示: Invalid configuration object. Webpack has been initialised using a configuration object that d ...

  3. (转载)MyBatis传入多个参数的问题

    原文地址:https://www.cnblogs.com/mingyue1818/p/3714162.html 一.单个参数: public List<XXBean> getXXBeanL ...

  4. Python学习笔记(Ⅱ)——循环/选择/函数

    一.循环结构 python中提供了for循环和while循环两种操作,没有do……while语句. 1.for循环: 与其他语言中for循环的常见的写法如for (int i=0;i<10;i+ ...

  5. Gvim：unable to load python

    环境 系统win7 64 bit 软件: Gvim8.1 : MS-Windows 32bit 软件: python2.7.14 windows 64bit 问题 点击打开Gvim时,提示:unabl ...

  6. GO : 斐波纳契数列

    package main import "fmt" // fibonacci is a function that returns // a function that retur ...

  7. Linux Maven安装

    Maven 官网,下载maven 包 http://maven.apache.org/download.cgi 下载完成:apache-maven-3.6.1-bin.tar.gz 解压到自定义目录: ...

  8. python交互的几种方式

    # 第一种交互方式 name = input("name:")age = input("age:")job = input("job:")s ...

  9. Linux系统下为普通用户加sudo权限

    Linux下为普通账号加sudo权限 1. 错误提示:当我们使用sudo命令切换用户的时候可能会遇到提示以下错误:xxx is not in the sudoers file. This incide ...

  10. drools kie-server和kie-workbench安装手册

    Drools规则引擎可以直接在项目中编写drl文件,后调用. 也可以搭建kie-server和kie-workbench来进行远程调用. 关系: 在kie-workbench通过页面配置规则,发布到执 ...