/// <summary>
/// 构造函数
/// </summary>
/// <param name="conString">数据库连接名或连接字符串</param>
/// <param name="dbType">数据库类型</param>
/// <param name="entityNamespace">数据库实体命名空间,注意,该命名空间应该包含所有需要的数据库实体</param>
public RepositoryDbContext(string conString, DatabaseType dbType)
{
_conString = conString;
_dbType = dbType;
RefreshDb();
DbModelFactory.AddObserver(this);
}
protected virtual void Dispose(bool disposing)
{
if (!disposedValue)
{
if (disposing)
{
_db?.Dispose();
}
_transaction = null;
DbModelFactory.RemoveObserver(this);
disposedValue = true;
}
}
public void RefreshDb()
{
//重用DbConnection,使用底层相同的DbConnection,支持Model持热更新
DbConnection con = null;
if (_transaction != null)
{
con = _transaction.Connection;
}
else
{
con = _db?.Database?.GetDbConnection() ?? DbProviderFactoryHelper.GetDbConnection(_conString, _dbType);
}
var dBCompiledModel = DbModelFactory.GetDbCompiledModel(_conString, _dbType);
_db = new BaseDbContext(_dbType, con, dBCompiledModel);
_db.Database.UseTransaction(_transaction);
disposedValue = false;
}
private Type CheckModel(Type type)
{
Type model = DbModelFactory.GetModel(type);
return(model);
}