如何从收集利用的IEqualityComparer中的LINQ鲜明删除重复 [英] How to remove duplicates from collection using IEqualityComparer, LinQ Distinct

问题描述

我无法从集合中移除重复的，我已经实现的IEqualityComparer为Employee类还是我没有得到输出

 静态无效的主要（字串[] args）
    {
        清单＆LT;雇工＆GT; Employeecollection =新的List＆LT;雇工＆GT;（）;        Employeecollection.Add（新雇工（ABC，高清））;
        Employeecollection.Add（新雇工（LMN，DEF））;
        Employeecollection.Add（新雇工（ABC，高清））;        IEnumerable的＆LT;雇工＆GT;科尔= Employeecollection.Distinct（新雇工（））;        的foreach（在科尔雇工项）
        {
            Console.WriteLine（item.fName ++ item.lName）;
        }    }
 

下面是Employee类的实现，在这里我实现的IEqualityComparer

 类雇工：＆的IEqualityComparer LT;雇工＆GT;
{
    公共字符串FNAME {搞定;组; }
    公共字符串LNAME {搞定;组; }    公共雇工（）
    {    }    公共雇工（串名字，姓氏字符串）
    {
        this.fName =名字;
        this.lName =姓氏;
    }    ＃地区的IEqualityComparer＆LT;＆PCF GT;会员    公共布尔等于（雇工X，雇工Y）
    {
        如果（x.fName == y.fName＆放大器;＆安培; x.lName == y.lName）
        {
            返回true;
        }        返回false;
    }    公众诠释GetHash code（雇工OBJ）
    {
        返回obj.GetHash code（）;
    }    #endregion
}
 

解决方案

忘记的IEqualityComparer，只是使用Linq直接：

  EmployeeCollection.GroupBy（X =＆gt;新建{x.fName，x.lName}），选择（G =＆GT; g.First（））;
 

I am unable to remove the duplicates from collection , i have implemented IEqualityComparer for the class Employee still i am not getting the output

static void Main(string[] args)
    {
        List<Employe> Employeecollection = new List<Employe>();

        Employeecollection.Add(new Employe("abc","def"));
        Employeecollection.Add(new Employe("lmn","def"));
        Employeecollection.Add(new Employe("abc", "def"));

        IEnumerable<Employe> coll = Employeecollection.Distinct(new Employe());

        foreach (Employe item in coll)
        {
            Console.WriteLine(item.fName + "   " + item.lName );
        }

    }

The Below is the Employee class implementation , here i implemented IEqualityComparer

class Employe : IEqualityComparer<Employe>
{
    public string fName { get; set; }
    public string lName { get; set; }

    public Employe()
    {

    }

    public Employe(string firstName, string LastName)
    {
        this.fName = firstName;
        this.lName = LastName;
    }

    #region IEqualityComparer<pcf> Members

    public bool Equals(Employe x, Employe y)
    {
        if (x.fName == y.fName && x.lName == y.lName)
        {
            return true;
        }

        return false;
    }

    public int GetHashCode(Employe obj)
    {
        return obj.GetHashCode();
    }

    #endregion
}

解决方案

Forget IEqualityComparer and just use Linq directly:

EmployeeCollection.GroupBy(x => new{x.fName, x.lName}).Select(g => g.First());

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