Consider enabling transient error resiliency by adding 'EnableRetryOnFailure()' to the
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Consider enabling transient error resiliency by adding 'EnableRetryOnFailure()' to the 'UseMySql' call
ef core连接不上MySQL
连接字符串是:
'Data Source = 127.0.0.1;Database = test1;UserID=root;password=123456;pooling=true;port=3306;sslmode=none;Charset=utf-8';
乍一看没啥错
正确的:'Data Source = 127.0.0.1;Database = 'test1';UserID=root;password=123456;pooling=true;port=3306;sslmode=none;Charset=utf-8';
数据库名要加引号
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连接MySql(基于.net core3.1)
首先第一步安装包,在NuGet包管理器里面安装Pomelo.EntityFrameworkCore.MySql
nuget慢的话可以使用命令行:PM>dotnet add package Pomelo.EntityFrameworkCore.MySql
第二步在配置appsettings配置文件中配置连接信息:
{ "Logging": { "IncludeScopes": false, "LogLevel": { "Default": "Warning" } }, "ConnectionStrings": { "MysqlConnection": "Data Source=localhost;Database=test;User ID=root;Password=123456;pooling=true;CharSet=utf8;port=3306;sslmode=none" } } //Data Soruce:IP //Database:数据库名 //User ID:数据库用户名 后面的都很容易看懂
第三步在Startup.cs文件的ConfigureServices方法添加:
var connection = Configuration.GetConnectionString("MysqlConnection"); //这里的MysqlConnection要和appsettings中ConnectionStrings里面的MysqlConnection相同 services.AddContextPool<AppDbContext>(options => //这是我目前找到的唯一一种在ConfigureServices里面配置Mysql服务 options.UseMySql( connection, new MySqlServerVersion(new SyStem.Version(8,0,17)) ) ); //网上很多都是 services.AddDbContext<DBContext>(options => options.UseMySQL(connection)); //但是这种不知道.net 3.1不支持,UseMySQL方法里面非空的参数没有只有connection这一个参数的重载方法。
迁移
在程序包管理控制台中执行
Install-Package Microsoft.EntityFrameworkCore.Tools
标签:resiliency,Consider,adding,UseMySql,Database,connection,MysqlConnection,Data,opt 来源: https://www.cnblogs.com/share-record/p/15080478.html