.Net8.0的数据库配置后，需要在Program.cs中进行配置

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorPages();

//// 添加 Entity Framework Core 服务
//builder.Services.AddDbContext<YourDbContext>(options => options.UseSqlServer(builder.Configuration.GetConnectionString("YourConnectionStringName")));
builder.Services.AddDbContext<UniversityContext>();

 var app = builder.Build();