Question

我创建了两个模型

 public class ExpenseReport
    {
        [Key]
        public int ItemId { get; set; }
        [Required]
        public string ItemName { get; set; }

        [Required]
        [DataType(DataType.Currency)]
        [Column(TypeName = "decimal(10, 2)")]
        public decimal Amount { get; set; }

        [DataType(DataType.Date)]
        [DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}", ApplyFormatInEditMode = true)]
        [Required]
        public DateTime ExpenseDate { get; set; } = DateTime.Now;

        [Required]
        public string Category { get; set; }
    }

和

  public class ExpenseDBContext : DbContext
    {
        public virtual DbSet<ExpenseReport> ExpenseReport { get; set; }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            if (!optionsBuilder.IsConfigured)
            {

                optionsBuilder.UseSqlServer("Data source=database/listDb.db");
            }

        }
    }

我想创建数据库之后所以我添加了迁移，在更新数据库后出现了这个错误：建立与SQL Server的连接时发生与网络相关或特定于实例的错误。服务器未找到或无法访问。验证实例名称正确，并且已将SQL Server配置为允许远程连接。（提供者：命名管道提供程序，错误：40-无法打开与SQL Server的连接）我想在文件夹-> database https://imgur.com/PcvCAgA中创建数据库-这可能吗？

我尝试过 https://docs.microsoft.com/en-us/sql/database-engine/configure-windows/troubleshoot-connecting-to-the-sql-server-database-engine?view=sql-server-2017 但这没帮助

Answer 1

使用用户名和密码的标准连接：

 optionsBuilder.UseSqlServer(
"Data Source=ServerName;" +
"Initial Catalog=DataBaseName;" +
"User id=UserName;" +
"Password=Secret;");

或受信任的连接：

 optionsBuilder.UseSqlServer(
"Data Source=ServerName;" +
"Initial Catalog=DataBaseName;" +
"Integrated Security=SSPI;");

找不到服务器或无法访问服务器

1 个答案: