Asp.Net Core中连接DB的方式

1.关系型数据库

如果是关系型数据库,则用以下方式连接

关系型数据库用EF的话直接在ConfigureServices里面配置以下,请看加粗的部分,读取配置文件中的DB连接字符串

public void ConfigureServices(IServiceCollection services)
{

     services.Configure<CookiePolicyOptions>(options => {
          options.CheckConsentNeeded = context => true;
          options.MinimumSameSitePolicy = SameSiteMode.None;
     });

    services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_3_0);

    services.AddDbContext<MvcMovieContext>(options => options.UseSqlServer(Configuration.GetConnectionString("MyBBS")));

}

2.NOSQL,比如MongoDB

替换为如下代码,且MoviesDatabaseSettings即为配置文件中的DB连接信息

services.Configure<MoviesDatabaseSettings>(Configuration.GetSection(nameof(MoviesDatabaseSettings)));

services.AddSingleton<IMoviesDatabaseSettings>(sp => sp.GetRequiredService<IOptions<MoviesDatabaseSettings>>().Value);

此外还需要添加一个services来做处理,使用的时候连接到MongoDB,因为NOSQL没有类似SQL Server一样,有EF框架做支撑

public MoviesService(IMoviesstoreDatabaseSettings settings)
{
    //连接数据库服务
    var client = new MongoClient(settings.ConnectionString);
    var database = client.GetDatabase(settings.DatabaseName);
    _movies = database.GetCollection<Book>(settings.MoviesCollectionName);
}