泛型的Distinct(IEqualityComparer)的用法

针对数组可以用List.Distinct(),可以过滤掉重复的内容。

针对对象中的某个字段只能用Distinct(IEqualityComparer<T>)

用法：

 1  public class AppIndex:BasePage
 2     {
 3         public void DoGet()
 4         {
 5             List<test11> list_test = new List<test11>();
 6             list_test.Add(new test11() { 
 7             m=1,
 8             v="one"
 9             });
             list_test.Add(new test11()
             {
                 m = 2,
                 v = "two"
             });
             list_test.Add(new test11()
             {
                 m = 3,
                 v = "three"
             });
             list_test.Add(new test11()
             {
                 m = 4,
                 v = "fornt"
             });
              list_test.Add(new test11()
             {
                 m = 4,
                 v = "fornt"
             });
               list_test.Add(new test11()
             {
                 m = 3,
                 v = "fornt"
             });
               var ss = list_test.Distinct(new Comparint());//这里调用
             this.Add("mylist",new Travel.DAL.AppActive().GetList(BaseCode));
         }
            }
 
    public class test11
    {
        public int m { get; set; }
        public string v { get; set; }
    }
    public class Comparint : IEqualityComparer<test11>
    {
 
        public bool Equals(test11 x, test11 y)
        {
            if (x == null && y == null)
                return false;
            return x.m==y.m;
        }
 
        public int GetHashCode(test11 obj) {
            return obj.ToString().GetHashCode();
        }
    }