/// <summary>
/// 按设定的条件执行搜索。
/// </summary>
/// <param name="pageNum">搜索指定页的设备。如果要搜索第2页及其之后页的数据，则应先设置 PageSize 属性。</param>
/// <param name="isReverse">是否对排序信息 OrderInfos 中设定的排序条件执行倒序，如果该参数为 true 将导致整个搜索结果的先后顺序发生逆转，通常情况下应使用 false。</param>
/// <param name="keepSource">是否保留所有设备至该搜索结果集合源的引用。当需要对设备进行进一步的数据查询操作，保留源引用可以提升查询性能。</param>
/// <returns>符合条件的设备集合。</returns>
public DeviceCollection Search(int pageNum, bool isReverse, bool keepSource)
{
base.PageNum = pageNum;
DeviceCollection devices = new DeviceCollection(keepSource);
try
{
System.Data.IDataReader dr = base.GetDataReader(isReverse);
if (dr != null)
{
while (dr.Read())
{
int intDeviceId = Function.ToInt(dr[Tables.Device.DeviceId]);
Device device = base.Application.GetDeviceInstance(intDeviceId);
if (device != null)
{
device.SetDataReader(dr);
if (this.Found != null)
{
if (keepSource)
{
if (isReverse)
{
devices.Insert(0, device);
}
else
{
devices.Add(device);
}
}
this.Found(device);
}
else
{
if (isReverse)
{
devices.Insert(0, device);
}
else
{
devices.Add(device);
}
}
device.DateRange = this.m_DateRange;
}
else
{
DeviceType deviceType = base.Application.DeviceTypeSort.GetDeviceType(Function.ToString(dr[Tables.Device.DeviceType]));
if (deviceType != null)
{
device = deviceType.CreateDevice();
device.SetApplication(base.Application);
device.SetDataReader(dr);
base.Application.SetDeviceInstance(device);
if (this.Found != null)
{
if (keepSource)
{
if (isReverse)
{
devices.Insert(0, device);
}
else
{
devices.Add(device);
}
}
this.Found(device);
}
else
{
if (isReverse)
{
devices.Insert(0, device);
}
else
{
devices.Add(device);
}
}
device.DateRange = this.m_DateRange;
}
else
{
throw new Exception("未发现类型为 " + Function.ToString(dr[Tables.Device.DeviceType]) + " 的设备。");
}
}
}
dr.Close();
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
base.DbConnection.Close();
}
return(devices);
}