public bool Exist(string id, DateTime timePoint)
{
id.NullCheck("id");
InSqlClauseBuilder inBuilder = new InSqlClauseBuilder("ID");
inBuilder.AppendItem(id);
DESchemaObjectCollection objs = Load(inBuilder, timePoint, false);
return(objs.Any());
}
/// <summary>
/// 根据ID和时间载入对象
/// </summary>
/// <param name="id">对象的ID</param>
/// <param name="timePoint">表示时间点的<see cref="DateTime"/> 或 <see cref="DateTime.MinValue"/>表示当前时间</param>
/// <returns><see cref="DESchemaObjectBase"/>的派生类型的实例</returns>
public DESchemaObjectBase Load(string id, DateTime timePoint, bool loadNormalStatus = true)
{
id.NullCheck("id");
InSqlClauseBuilder inBuilder = new InSqlClauseBuilder("ID");
inBuilder.AppendItem(id);
DESchemaObjectCollection objs = Load(inBuilder, timePoint, loadNormalStatus);
if (!objs.Any())
{
throw new Exception(string.Format("{0}不能找到ID为{1}的对象", (timePoint == DateTime.MinValue ? string.Empty : string.Format("在{0}时间下", timePoint.ToString("yyyy-MM-dd HH:mm:ss"))), id));
}
return(objs.Single());
}