public AContext(DbContextOption option)
{
if (option == null)
{
throw new ArgumentNullException(nameof(option));
}
if (string.IsNullOrEmpty(option.ConnectionString))
{
throw new ArgumentNullException(nameof(option.ConnectionString));
}
if (string.IsNullOrEmpty(option.ModelAssemblyName))
{
throw new ArgumentNullException(nameof(option.ModelAssemblyName));
}
Option = option;
}
public AContextEF6(DbContextOption option) : base(option.ConnectionString)
{
Option = option;
Configuration.AutoDetectChangesEnabled = false;
Configuration.ValidateOnSaveEnabled = false;
Configuration.LazyLoadingEnabled = false;
Configuration.ProxyCreationEnabled = false;
var isCreateDb = 0;
switch (isCreateDb)
{
case 0:
//从不创建数据库
Database.SetInitializer <AContextEF6>(null);
break;
case 1:
//数据库不存在时重新创建数据库
Database.SetInitializer(new CreateDatabaseIfNotExists <AContextEF6>());
break;
case 2:
//每次启动应用程序时创建数据库
Database.SetInitializer(new DropCreateDatabaseAlways <AContextEF6>());
break;
case 3:
//模型更改时重新创建数据库
Database.SetInitializer(new DropCreateDatabaseIfModelChanges <AContextEF6>());
break;
}
((IObjectContextAdapter)this).ObjectContext.CommandTimeout = 180;
}
