/// <summary>
/// 计算要插入、更新或删除的已修改对象的集，并执行相应命令以实现对数据库的更改
/// </summary>
/// <returns></returns>
public virtual int SubmitChanges()
{
int rowCount = _dbQueryables.Count;
if (rowCount == 0)
{
return(0);
}
List <DbCommandDefinition> sqlList = _provider.Resolve(_dbQueryables);
List <int> identitys = _database.Submit(sqlList);
SetAutoIncrementValue(_dbQueryables, identitys);
this.InternalDispose();
return(rowCount);
}