NetCore EF 配置DBContext By MsSql

发布时间：2023-05-09 13:11:00 所属栏目：MsSql教程来源：

导读：配置DbContext
1.1.Startup / ConfigureServices

services.AddDbContext<CustDbContext>(options => options.UsesqlServer(configuration["ConnectionStrings:DefaultConnection"]));
如果不能注入Configuratio

配置DbContext
1.1.Startup / ConfigureServices

services.AddDbContext<CustDbContext>(options => options.UsesqlServer(configuration["ConnectionStrings:DefaultConnection"]));
如果不能注入Configuration，则为：

//读取配置文件
IConfiguration configuration = new ConfigurationBuilder().AddJsonFile("appsettings.json", false, true).Build();
services.AddSingleton(configuration);
services.AddDbContext<CustDbContext>(options => options.UsesqlServer(configuration["ConnectionStrings:DefaultConnection"]));
1.2.CustDbContext

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
if (!optionsBuilder.IsConfigured)
{
optionsBuilder.UsesqlServer("Name=ConnectionStrings:DefaultConnection");
}
}
注入DbContext
2.1.通过 IServiceProvider 注入

provider.GetService<CustDbContext>()
2.2.构造函数注入

public class CustClass
{
private readonly CustDbContext dbContext;
public CustClass(CustDbContext _dbContext)
{
dbContext = _dbContext;
}
}

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