mysql ado.net connector下载地址: http://dev.mysql.com/downloads/connector/net/ 选择版本: Generally Available Releases(1)是发布版(bug什么的较少的版本吧),而Development Releases(2)是开发版 我们采用1版本 Windows (x86, 32-bit), MSI Installer 该版本是window下的安装版,如果你安装了这个版本的话,在本机调试的时候可以不用再次注册…

allow zero datetime=true导致datetime转换失败:MySql.Data.Types.MySqlDateTime”的对象无法转换为类型“System.Nullable`1[System.DateTime] 做反射转换时遇到该问题 mysql连接字符串去掉allow zero datetime=true,否则返回的日期会是MySql.Data.Types.MySqlDateTime类型,而不是DataTime…

本文涉及到的mysql知识点: mysql中的if条件语句用法: IF(expr1,expr2,expr3) mysql使用变量(mysql中变量不用事前申明) mysql事务 testcase 为了测试mysql事务,写了个testcase, using Microsoft.VisualStudio.TestTools.UnitTesting; using MySql.Data.MySqlClient; using System; using System.Collections.Generi…

insert INTO stu(name) VALUES('maimai'); set @ReturnValue=@@IDENTITY; string sql="insert INTO stu(name) VALUES(@name);set @ReturnValue=@@IDENTITY; MySqlParameter[] parameters = { new MySqlParameter("@name", MySqlDbType.VarChar,100),MySqlDbTy…

wget http://dev.mysql.com/get/Downloads/Connector-Net/mysql-connector-net-6.8.3-noinstall.zipunzip mysql-connector-net-6.8.3-noinstall.zip # Rename Files to Linux$ mv v2.0/mysql.data.cf.dll v2.0/MySql.Data.CF.dll$ mv v2.0/mysql.data.dll v2.0/MySql.Da…

MySqlHelper.cs代码如下: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Text; using System.Data; using System.Collections; using MySql.Data.MySqlClient; using MySql.Data.Types; using System.Configuration;…

Could not load file or assembly 'MySql.Data.CF, Version=6.4.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d, Retargetable=Yes' or one of its dependencies. The given assembly name or codebase was invalid. (Exception from HRESULT: 0x80131047 I so…

For example, change mysql data directory from /var/lib/mysql to /var/data/mysql Step1: Copy the /var/lib/mysql to new name /var/lib/mysqlnew cp -prvf /var/lib/mysql /var/lib/mysqlnew sudo vi /etc/mysql/my.cnf  Looking for: datadir = /var/lib/mysql Ch…

很多时候,mysql的数据会非常大,数据默认放在/var/lib/mysql,由于/var所划分的空间不够大,所以我们需要将mysql数据存放路径修改一下,放到大分区里面,以便可以应付mysql数据增长. 1.设置新的存放路径 mkdir -p /data/mysql 2.复制原有数据 cp -R /var/lib/mysql/* /data/mysql 3.修改权限 chown -R mysql:mysql /data/mysql 4.修改配置文件 vim /etc/mysql/my.cnf…

Warning:The /usr/local/mysql/data directory is not owned by the 'mysql' or '_mysql' 这应该是某种情况下导致/usr/local/mysql/data的宿主发生了改变. 解决方法:打开终端运行 sudo chown -R mysql /usr/local/mysql/data 即可. mac 下运行  sudo chown -R  _mysql:wheel  /usr/local/mysql/data . -c 显…