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做网站现在要多少钱,2024百度下载,百度平台商家app下载,免费php源码网目录建立默认带身份验证 Blazor 程序角色/组件/特性/过程逻辑DB 改 Sqlite将自定义字段添加到用户表脚手架拉取IDS文件,本地化资源freesql 生成实体类,freesql 管理ids数据表初始化 Roles,freesql 外键 > 导航属性完善 freesql 和 bb 特性本节源码 https://github.com/…

本节源码

https://github.com/densen2014/Blazor100/tree/Blazor-%E6%95%99%E7%A8%8B15-3/b15blazorIDS

引用 EntityFrameworkCore.Sqlite 库

<PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="7.0.2" />

配置文件加入Sqlite数据库链接

`appsettings.json`文件加入一行代码 `"IdsSQliteConnection": "Data Source=ids.db;"`

最终文件如下

{"ConnectionStrings": {"DefaultConnection": "Server=(localdb)\\mssqllocaldb;Database=aspnet-b15blazorIDS-f969184b-89a5-4ccf-beeb-911a756ae70a;Trusted_Connection=True;MultipleActiveResultSets=true","IdsSQliteConnection": "Data Source=ids.db;"},...
}

使用EF Sqlite 配置

`Program.cs`文件

//EF SqlServer 配置// Add services to the container.
//var connectionString = builder.Configuration.GetConnectionString("DefaultConnection") ?? throw new InvalidOperationException("Connection string 'DefaultConnection' not found.");//builder.Services.AddDbContext<ApplicationDbContext>(options => options.UseSqlServer(connectionString));//EF Sqlite 配置
builder.Services.AddDbContext<ApplicationDbContext>(o => o.UseSqlite(builder.Configuration.GetConnectionString("IdsSQliteConnection")));

重新生成 Migrations 脚本

之前版本是基于localdb,如果不换脚本会出现An error occurred applying migrations, try applying them from the command line错误

删除 Migrations 文件夹

可选: 保留sqlserver的Migrations脚本, 使用从项目中排除菜单

创建新迁移并为其生成 SQL 脚本

打开命令行, VS菜单栏=>工具=>Nuget包管理器=>程序包管理器控制台(Packge Manager Console), 执行以下命令

cd b15blazorIDS
dotnet ef migrations add idsSqlite
dotnet ef database update

完整流程

PM> cd b15blazorIDS
PM> dotnet ef migrations add idsSqlite
Build started...
Build succeeded.
Done. To undo this action, use 'ef migrations remove'
PM> dotnet ef database update
Build started...
Build succeeded.
info: Microsoft.EntityFrameworkCore.Database.Command[20101]Executed DbCommand (7ms) [Parameters=[], CommandType='Text', CommandTimeout='30']SELECT COUNT(*) FROM "sqlite_master" WHERE "name" = '__EFMigrationsHistory' AND "type" = 'table';
...
Done.
PM>