public class StationSched
{
/// <summary>
/// 所有的站点信息
/// </summary>
List<StationInfo> stations = new List<StationInfo>();
/// <summary>
/// 线路信息
/// </summary>
List<ShipInfo> lines = new List<ShipInfo>();
/// <summary>
/// 构造函数，初始化站点和线路信息
/// </summary>
public StationSched()
{
stations.Add(new StationInfo() { Sid = 1, Lid = 1 });//0
stations.Add(new StationInfo() { Sid = 2, Lid = 1 });//1
stations.Add(new StationInfo() { Sid = 3, Lid = 1 });//2
stations.Add(new StationInfo() { Sid = 4, Lid = 1 });//3
stations.Add(new StationInfo() { Sid = 5, Lid = 1 });//4
stations.Add(new StationInfo() { Sid = 6, Lid = 1 });//5
stations.Add(new StationInfo() { Sid = 7, Lid = 1 });//6
stations.Add(new StationInfo() { Sid = 19, Lid = 2 });//7
stations.Add(new StationInfo() { Sid = 18, Lid = 2 });
stations.Add(new StationInfo() { Sid = 17, Lid = 2 });
stations.Add(new StationInfo() { Sid = 3, Lid = 2 });
stations.Add(new StationInfo() { Sid = 13, Lid = 2 });
stations.Add(new StationInfo() { Sid = 16, Lid = 2 });
stations.Add(new StationInfo() { Sid = 15, Lid = 3 });//13
stations.Add(new StationInfo() { Sid = 14, Lid = 3 });
stations.Add(new StationInfo() { Sid = 13, Lid = 3 });
stations.Add(new StationInfo() { Sid = 12, Lid = 3 });
stations.Add(new StationInfo() { Sid = 11, Lid = 3 });
stations.Add(new StationInfo() { Sid = 5, Lid = 3 });
stations.Add(new StationInfo() { Sid = 10, Lid = 3 });
stations.Add(new StationInfo() { Sid = 9, Lid = 3 });
stations.Add(new StationInfo() { Sid = 8, Lid = 3 });
for (int i = 0; i < 6; i++)
{
lines.Add(new ShipInfo() { Curr = stations[i], Next = stations[i + 1] });
}
for (int i = 6; i > 0; i--)
{
lines.Add(new ShipInfo() { Curr = stations[i], Next = stations[i - 1] });
}
for (int i = 7; i < 12; i++)
{
lines.Add(new ShipInfo() { Curr = stations[i], Next = stations[i + 1] });
}
for (int i = 12; i > 7; i--)
{
lines.Add(new ShipInfo() { Curr = stations[i], Next = stations[i - 1] });
}
for (int i = 13; i < 21; i++)
{
lines.Add(new ShipInfo() { Curr = stations[i], Next = stations[i + 1] });
}
for (int i = 21; i > 13; i--)
{
lines.Add(new ShipInfo() { Curr = stations[i], Next = stations[i - 1] });
}
}
/// <summary>
/// 获取sid站点可以到达的站点信息，去除已经计算过的preid站点
/// </summary>
/// <param name="preid"></param>
/// <param name="sid"></param>
/// <returns></returns>
public List<StationInfo> GetNext(int preid, int sid)
{
List<StationInfo> list = new List<StationInfo>();
foreach (var item in lines)
{
if (item.Curr.Sid == sid && item.Next.Sid != preid) list.Add(item.Next);
}
return list;
}
/// <summary>
/// 获取线路信息
/// </summary>
/// <param name="s">起始站点编号</param>
/// <param name="e">结束站点编号</param>
/// <returns></returns>
public List<string> GetResult(int s, int e)
{
List<List<int>> temp = GetLine(s, e);
List<string> result = new List<string>();
List<List<int>> line = new List<List<int>>();
foreach (var item in temp)
{
if (item.Count > 0 && item[item.Count - 1] == e)
line.Add(item);
}
string src = "";
int currLine = -1;
foreach (var item in line)
{
currLine = GetLineNumber(item[0], item[1]);
src += "从[" + currLine + "号线]的[" + item[0] + "]上车";
for (int i = 1; i < item.Count; i++)
{
if (i == item.Count - 1)
{
src += ",在[" + item[i] + "]站点下车。";
result.Add(src);
src = "";
break;
}
int tempLine = GetLineNumber(item[i], item[i + 1]);
if (tempLine != currLine)
{
currLine = tempLine;
src += ",在[" + item[i] + "]站点换乘[" + currLine + "号线]";
}
}
}
return result;
}
/// <summary>
/// 根据相邻的两个点取当前的线路
/// </summary>
/// <param name="s"></param>
/// <param name="e"></param>
/// <returns></returns>
private int GetLineNumber(int l, int r)
{
foreach (var item in lines)
{
if ((item.Curr.Sid == l && item.Next.Sid == r) || (item.Curr.Sid == r && item.Next.Sid == l))
return item.Next.Lid;
}
return -1;
}
/// <summary>
/// 获取线路的ID集合
/// </summary>
/// <param name="s">起始站点编号</param>
/// <param name="e">结束站点编号</param>
/// <returns></returns>
private List<List<int>> GetLine(int s, int e)
{
List<List<int>> result = new List<List<int>>();
List<int> curr = new List<int>();
curr.Add(s);
result.Add(curr);
int currLine = 0;
int preSid = s;
int currSid = s;
while (true)
{
if (currLine >= result.Count) return result;
currSid = result[currLine][result[currLine].Count - 1];
if (currSid == e)
{
currLine += 1;
continue;
}
if (result[currLine].Count > 1)
preSid = result[currLine][result[currLine].Count - 2];
if (currSid <= 0)
{
currLine += 1;
continue;
}
List<StationInfo> temp = GetNext(preSid, currSid);
if (temp.Count == 0)
{//某条线路到头
currLine += 1;
}
else if (temp.Count == 1)
{//不需要换乘继续前进
result[currLine].Add(temp[0].Sid);
}
else
{//需要换乘了。
for (int i = 1; i < temp.Count; i++)
{
if (!result[currLine].Contains(temp[i].Sid))
{//防止死循环，过滤掉已经计算过的站点。
result.Add(result[currLine].GetRange(0, result[currLine].Count));
result[result.Count - 1].Add(temp[i].Sid);
}
}
result[currLine].Add(temp[0].Sid);
}
}
}
}
/// <summary>
/// 站点信息
/// </summary>
public class StationInfo
{
public int Lid { get; set; }
public int Sid { get; set; }
public override string ToString()
{
return "Sid:" + Sid + "--Lid:" + Lid;
}
}
/// <summary>
/// 关系信息
/// </summary>
public class ShipInfo
{
public StationInfo Curr { get; set; }
public StationInfo Next { get; set; }
public override string ToString()
{
return "Curr:" + Curr.Sid + "--Next:" + Next.Sid;
}
}
