95 lines
2.8 KiB
C#
95 lines
2.8 KiB
C#
using System;
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using System.Collections.Generic;
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namespace WindowsService1
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{
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/// <summary>
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/// 判断工位耗时变化
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/// </summary>
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public class StationDataComparer : IEqualityComparer<StationData>
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{
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private const float FloatEpsilon = 0.000001f; // 可以调整精度
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public bool Equals(StationData x, StationData y)
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{
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if (ReferenceEquals(x, y)) return true;
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if (x is null || y is null) return false;
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// 比较名称
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if (x.Name != y.Name) return false;
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// 比较主值
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if (x.MainValue is float xFloat && y.MainValue is float yFloat)
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{
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if (Math.Abs(xFloat - yFloat) > FloatEpsilon) return false;
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}
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else if (x.MainValue is double xDouble && y.MainValue is double yDouble)
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{
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if (Math.Abs(xDouble - yDouble) > FloatEpsilon) return false;
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}
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else if (!Equals(x.MainValue, y.MainValue))
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{
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return false;
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}
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// 比较时间戳（可以选择是否忽略毫秒）
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return Math.Abs((x.Timestamp - y.Timestamp).TotalMilliseconds) < 1;
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}
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public int GetHashCode(StationData obj)
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{
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if (obj is null) return 0;
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unchecked
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{
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int hash = 17;
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hash = hash * 23 + (obj.Name?.GetHashCode() ?? 0);
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// 对于浮点数，可以先转换为整数再计算哈希
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if (obj.MainValue is float f)
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{
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hash = hash * 23 + ((int)(f * 1000000)).GetHashCode();
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}
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else
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{
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hash = hash * 23 + (obj.MainValue?.GetHashCode() ?? 0);
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}
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hash = hash * 23 + obj.Timestamp.GetHashCode();
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return hash;
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}
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}
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}
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/// <summary>
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/// 判断时间戳变化
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/// </summary>
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public class StationDataComparer2 : IEqualityComparer<StationData>
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{
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public bool Equals(StationData x, StationData y)
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{
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if (ReferenceEquals(x, y)) return true;
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if (x is null || y is null) return false;
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// 只比较名称和时间戳
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if (x.Name != y.Name) return false;
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// 比较时间戳，检查是否完全相同
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return x.Timestamp == y.Timestamp;
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}
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public int GetHashCode(StationData obj)
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{
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if (obj is null) return 0;
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unchecked
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{
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int hash = 17;
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hash = hash * 23 + (obj.Name?.GetHashCode() ?? 0);
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hash = hash * 23 + obj.Timestamp.GetHashCode();
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return hash;
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}
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}
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}
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}
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