我正在尝试修改字典中的值,但编译器会抛出KeyNotFoundException
。我确定,我在字典中声明了这个键,因为我正在调用GenerateEmptyChunks()
方法,该方法用字块填充字典,其中键的位置和值对于级别生成器是空的。我检查了调试器,Chunks
字典对象正确填充了键和值。它是由我的非工作CompareTo
方法引起的吗?如果是,我如何修改CompareTo
方法以返回正确的值?
public Dictionary<WPoint, WChunk> Chunks = new Dictionary<WPoint, WChunk>();
GenerateEmptyChunks()方法:
public void GenerateEmptyChunks(int Xcount, int Ycount)
{
for(int x = 0; x <= Xcount; x++)
{
for (int y = 0; y <= Ycount; y++)
{
this.Chunks.Add(new WPoint(x, y), new WChunk(x, y));
}
}
}
AddBlock()方法,由每个磁贴的级别生成器调用:
public void AddBlock(WPoint location, int data)
{
this.Chunks[location.GetChunk()].AddTile(new WTile(location, data));
}
WChunk 对象:
public class WChunk
{
public int ChunkX;
public int ChunkY;
public SortedDictionary<WPoint, WTile> Tiles = new SortedDictionary<WPoint, WTile>();
public WChunk(int posX, int posY)
{
ChunkX = posX;
ChunkY = posY;
}
public void AddTile(WTile tile)
{
Tiles.Add(tile.GetLocation(), tile);
}
}
WPoint 对象:
public class WPoint : IComparable
{
public float X;
public float Y;
public WPoint(float x, float y)
{
X = x;
Y = y;
}
public WPoint GetChunk()
{
//Oprava pre bloky mensie ako (1,1)
if (X <= 16 && Y <= 16)
{
return new WPoint(0, 0);
}
else
{
double pX = (double)(X / 16);
double pY = (double)(Y / 16);
return new WPoint((int)Math.Floor(pX), (int)Math.Floor(pY));
}
}
public int CompareTo(object obj)
{
WPoint point2 = (WPoint)obj;
if (point2.X == this.X && point2.Y == this.Y)
{
return 0;
}
else if (point2.X >= this.X && point2.Y >= this.Y)
{
return -1;
}
else
{
return 1;
}
}
}
为什么编译器在字典中拒绝键时会有什么想法?
答案 0 :(得分:3)
是。你还没有覆盖GetHashCode。
答案 1 :(得分:0)
Dictionary使用GetHashCode和Equals进行键比较,因此实现IComparable接口是不够的。看看这个answer,这正是你需要的。