/// <summary>
/// 判断记录是否存在
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="table"></param>
/// <param name="entity"></param>
/// <returns></returns>
private bool Exists <T>(Table table, T entity)
where T : Entity
{
WhereClip where = DataUtils.GetPkWhere <T>(table, entity);
FromSection <T> fs = new FromSection <T>(dbProvider, dbTrans, table);
return(fs.Where(where).Count() > 0);
}
/// <summary>
/// 判断记录是否存在
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="table"></param>
/// <param name="where"></param>
/// <returns></returns>
private bool Exists <T>(Table table, WhereClip where)
where T : Entity
{
if (where == null || where == WhereClip.None)
{
throw new DataException("在判断记录是否存在时出现异常，条件为null或WhereClip.None！");
}
FromSection <T> fs = new FromSection <T>(dbProvider, dbTrans, table, null);
return(fs.Where(where).Count() > 0);
}
/// <summary>
/// 进行条件操作
/// </summary>
/// <param name="where"></param>
/// <returns></returns>
public TableRelation <T> Where(WhereClip where)
{
section.Where(where);
return(this);
}