/// <summary>
/// 根据时间级别获取数据源和表名
/// </summary>
/// <param name="type">视频结构化数据类型</param>
/// <returns>第一个参数表示数据源，第二个参数表示是否接收分表，null表示不分表</returns>
public Tuple <IQueryable <VideoStruct>, string> Queryable(VideoStructType type)
{
if (type == VideoStructType.机动车)
{
return(new Tuple <IQueryable <VideoStruct>, string>(Vehicles.AsNoTracking(), VehicleTable));
}
else if (type == VideoStructType.非机动车)
{
return(new Tuple <IQueryable <VideoStruct>, string>(Bikes.AsNoTracking(), BikeTable));
}
else
{
return(new Tuple <IQueryable <VideoStruct>, string>(Pedestrains.AsNoTracking(), PedestrainTable));
}
}
