Question

我想将连接字符串传递给我的dbcontext模型。

我正在使用Microsoft.EntityFrameworkCore.Sqlite包。

public void ConfigureServices(IServiceCollection services)
{
    //Adds Entity FrameWork for SqlLite
    var config = Configuration.GetConnectionString("DefaultConnection");
    //How to pass the connection string, AddEntityFrameworkSqlite take no extra parameters
    //services.AddEntityFrameworkSqlite().AddDbContext<ETLDataBase>(opt => opt.????)
    services.AddEntityFrameworkSqlite().AddDbContext<ETLDataBase>();
    services.AddMvc();

    services.AddScoped<IRepository<User>, AccountRepository>();
}

我没有找到直接在我的dbcontext中访问ContentRootPath的方法。我在appsettings.json中对数据库的路径进行了硬编码，但即使这样，我也无法将路径传递给我的模型。

这是我的上下文模型：

public class ETLDataBase: DbContext
{
    public ETLDataBase(DbContextOptions<ETLDataBase> options)
        : base(options)
    {}
    public DbSet<Datasouce> Datasources { get; set; }
    public DbSet<User> Users { get; set; }
    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        // I want to get my connection string in here
        //I can't access to the env.ContentRootPath
        var connection = new SqliteConnection(connectionString);

        optionsBuilder.UseSqlite(connection);
    }
}

修改

如果我在Startup.cs：

中这样做

services.AddEntityFrameworkSqlite().AddDbContext<ETLDataBase>(options=> options.UseSqlite(Configuration["ConnectionStrings:Default‌Connection"]));

我删除了OnConfiguring类中的ETLDataBase函数。

我有这个错误：

No database provider has been configured for this DbContext. A provider can be configured by overriding the DbContext.OnConfiguring method or by using AddDbContext on the application service provider. If AddDbContext is used, then also ensure that your DbContext type accepts a DbContextOptions<TContext> object in its constructor and passes it to the base constructor for DbContext.

将连接字符串传递给dbcontext for Sqlite

0 个答案: