public static List <Exhibition> SelectByParentID(int parentID)
{
List <Exhibition> channelData = new List <Exhibition>();
List <int> idList = new List <int>();
//查询数据
Exhibition value = new Exhibition();
Exhibition conditon = new Exhibition();
if (parentID > 0)
{
conditon.Path = "%~" + parentID + "~%";
conditon.AddAttach("Path", "like");
}
List <Exhibition> oldTypeData = TableOperate <Exhibition> .Select(value, conditon, 0, " order by ParentID, Depth, ID DESC ");
for (int i = 0; i < oldTypeData.Count; i++)
{
Exhibition typeObj = oldTypeData[i];
if (typeObj.Depth == 0) //深度为0，直接添加
{
channelData.Insert(0, typeObj);
idList.Insert(0, typeObj.ID);
}
else
{
int parentIndex = idList.IndexOf(typeObj.ParentID); //查找上及目录所在位置！
channelData.Insert(parentIndex + 1, typeObj);
idList.Insert(parentIndex + 1, typeObj.ID); //将数据插入上级目录之后
}
}
return(channelData);
}
private static int UpdateChild(Exhibition channel, Exhibition oldChannel)
{
//int depthSpan = channel.Depth - oldChannel.Depth;
Exhibition value = new Exhibition();
Exhibition condition = new Exhibition();
condition.Path = "%~" + channel.ID + "~%";
condition.AddAttach("Path", "like");
value.RootID = channel.RootID;
value.Depth = channel.Depth - oldChannel.Depth;
value.AddParameter("OldPath", oldChannel.Path + "" + channel.ID + "~");
value.AddParameter("OldNamePath", oldChannel.NamePath + "" + oldChannel.Name + "~");
value.Path = channel.Path + "" + channel.ID + "~";
value.NamePath = channel.NamePath + "" + channel.Name + "~";
value.SetUpdate(" RootID=@RootID, Depth = Depth + @Depth, [Path]=REPLACE([Path], @OldPath, @Path) , [NamePath]=REPLACE([NamePath], @OldNamePath, @NamePath)");
return(TableOperate <Exhibition> .Update(value, condition));
}
/// <summary>
/// 获取所有子类id序列，例如 1,3,4,5,6
/// </summary>
/// <param name="id">要查询频道的id</param>
/// <returns></returns>
public static string GetChildID(int id)
{
Exhibition value = new Exhibition();
value.ID = 0;
Exhibition conditon = new Exhibition();
conditon.Path = "%~" + id + "~%";
conditon.AddAttach("Path", "like");
List <Exhibition> childChannelList = TableOperate <Exhibition> .Select(value, conditon);
string idStr = "";
for (int i = 0; i < childChannelList.Count; i++)
{
idStr += childChannelList[i].ID + ",";
}
idStr = idStr.Trim(',');
return(idStr);
}