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53 lines
1.3 KiB
53 lines
1.3 KiB
3 years ago
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using System.Collections.Generic;
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using System.Linq;
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namespace EC.Utils
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{
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/// <summary>
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/// 泛型Distinct比较
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/// Data.Distinct(new ExtList<T>("字段")).ToList();
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/// 版 本：V3.0.0
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/// 版 权：EasyCode
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/// 作 者：LXC
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/// </summary>
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/// <typeparam name="T"></typeparam>
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public class ExtList<T> : IEqualityComparer<T> where T : class, new()
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{
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private string[] comparintFiledName = { };
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public ExtList(params string[] comparintFiledName)
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{
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this.comparintFiledName = comparintFiledName;
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}
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bool IEqualityComparer<T>.Equals(T x, T y)
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{
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if (x == null && y == null)
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{
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return false;
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}
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if (comparintFiledName.Length == 0)
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{
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return x.Equals(y);
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}
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bool result = true;
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var typeX = x.GetType();//获取类型
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var typeY = y.GetType();
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foreach (var filedName in comparintFiledName)
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{
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var xPropertyInfo = (from p in typeX.GetProperties() where p.Name.Equals(filedName) select p).FirstOrDefault();
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var yPropertyInfo = (from p in typeY.GetProperties() where p.Name.Equals(filedName) select p).FirstOrDefault();
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result = result
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&& xPropertyInfo != null && yPropertyInfo != null
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&& xPropertyInfo.GetValue(x, null).ToString().Equals(yPropertyInfo.GetValue(y, null));
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}
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return result;
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}
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int IEqualityComparer<T>.GetHashCode(T obj)
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{
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return obj.ToString().GetHashCode();
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}
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}
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}
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