请尝试以以下格式指定连接字符串:
<add name="DefaultConnection" connectionString="Data Source=127.0.0.1, 1433;Initial Catalog=YourDB;User Id=XXXX;Password=XXXXX;Asynchronous Processing=True;Encrypt=False;TrustServerCertificate=True;Persist Security Info=True" providerName="System.Data.SqlClient" />
然后确保在Models / IdentityModels.cs中
public class ApplicationDbContext : IdentityDbContext<ApplicationUser> { public ApplicationDbContext() : base("DefaultConnection") { }


