根据字段过滤重复数据

 

using System.Collections.Generic;using System.Linq;namespace KanChang.Util{    /// 
    /// 版 本 1.0.0.0    /// Copyright (c) 2012-2017 张刊    /// CLR版本：4.0.30319.42000    /// 创建人：张刊 （kan.zhang-cn@hotmail.com）    /// 描 述：可以根据字段过滤重复的数据      /// 
    public class Comparint
     
       : IEqualityComparer
      
        where T : class, new()    {        private string[] comparintFiledName = { };        public Comparint() { }        public Comparint(params string[] comparintFiledName)        {            this.comparintFiledName = comparintFiledName;        }        bool IEqualityComparer
       
        .Equals(T x, T y)        {            if (x == null && y == null)            {                return false;            }            if (comparintFiledName.Length == 0)            {                return x.Equals(y);            }            bool result = true;            var typeX = x.GetType();//获取类型            var typeY = y.GetType();            foreach (var filedName in comparintFiledName)            {                var xPropertyInfo = (from p in typeX.GetProperties() where p.Name.Equals(filedName) select p).FirstOrDefault();                var yPropertyInfo = (from p in typeY.GetProperties() where p.Name.Equals(filedName) select p).FirstOrDefault();                result = result                    && xPropertyInfo != null && yPropertyInfo != null                    && xPropertyInfo.GetValue(x, null).ToString().Equals(yPropertyInfo.GetValue(y, null));            }            return result;        }        int IEqualityComparer
        
         .GetHashCode(T obj)        {            return obj.ToString().GetHashCode();        }    }}