Question

奇怪的问题我在表上有一个主键，但是当我编译并运行我的程序实体时，制动并抱怨它不存在。

这是我得到的错误：

在模型生成期间检测到一个或多个验证错误：
WindowsFormsApplication1.Coverage：EntityType＆＃39; Coverage＆＃39;没有定义键。定义此EntityType的键覆盖范围：EntityType：EntitySet＆＃39; Coverages＆＃39;是基于类型＆＃39;覆盖范围＆＃39;没有定义键

即使它在我的SQL Server数据库中被定义为主键并且是标识列。

现在我通过Code切换到我的数据库，我想知道这是我的问题的一部分。

public string SetupConnections()
{
    SqlConnectionStringBuilder sqlBuilder = new SqlConnectionStringBuilder();

    try
    {
        // Specify the provider name, server and database.
        string providerName = "System.Data.SqlClient";
        string serverName = "sourcenet";
        string databaseName = "COASTALCAROLINAPODIATRY";

        // Initialize the connection string builder for the underlying provider.
        // Set the properties for the data source.
        sqlBuilder.DataSource = serverName;
        sqlBuilder.InitialCatalog = databaseName;
        sqlBuilder.IntegratedSecurity = true;
        // sqlBuilder.UserID = "scheduler";
        // sqlBuilder.Password = "Y=1.5x+10";

        // Build the connection string.
        string providerString = sqlBuilder.ToString();

        // Initialize the EntityConnectionStringBuilder.
        EntityConnectionStringBuilder entityBuilder = new EntityConnectionStringBuilder();

        // Set the provider name.
        entityBuilder.Provider = providerName;

        // Set the provider-specific connection string.
        entityBuilder.ProviderConnectionString = providerString;

        // Set the Metadata location.
        entityBuilder.Metadata = @"res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl";

        Console.WriteLine(entityBuilder.ToString());

        using (EntityConnection conn = new EntityConnection(entityBuilder.ToString()))
        {
            conn.Open();
            Console.WriteLine("Just testing the connection.");
            conn.Close();
        }
}

然后在我的模型中我有以下

public SMBASchedulerEntities() : base("name=SMBASchedulerEntities")
{
}

public SMBASchedulerEntities(string connectionstring) : base(connectionstring)
{
}

public virtual DbSet<Appointment> Appointments { get; set; }
public virtual DbSet<AppointmentType> AppointmentTypes { get; set; }
public virtual DbSet<Carrier> Carriers { get; set; }
public virtual DbSet<NextID> NextIDs { get; set; }
public virtual DbSet<Option> Options { get; set; }
public virtual DbSet<Patient> Patients { get; set; }
public virtual DbSet<Policy> Policies { get; set; }
public virtual DbSet<Provider> Providers { get; set; }
public virtual DbSet<Referral> Referrals { get; set; }
public virtual DbSet<Coverage> Coverages { get; set; }

修改2

好的，所以作为测试，我删除了连接字符串对象并将其放在这里，而不是像这样，并且想知道出了什么问题。

这可以传递连接字符串吗？

public SMBASchedulerEntities(string connectionstring) : base("name=SMBASchedulerEntities")
{
}

编辑3

这是连接构建器创建的内容：

Data Source=sourcenet;Initial Catalog=COASTALCAROLINAPODIATRY;Integrated Security=True

代码：

public SMBASchedulerEntities(string connectionstring) : base(connectionstring)
{
}

当传递给上述方法时哪个不起作用我相信那里有人已经这样做了。

即使存在主键，也会丢失主键

0 个答案: