using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
/// <summary>
/// 可以根据字段过滤重复的数据
/// </summary>
/// <typeparam name="T"></typeparam>
public class Comparint<T> : IEqualityComparer<T> where T : class, new()
{
private string[] comparintFiledName = { };
public Comparint() { }
public Comparint(params string[] comparintFiledName)
{
this.comparintFiledName = comparintFiledName;
}
bool IEqualityComparer<T>.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<T>.GetHashCode(T obj)
{
return obj.ToString().GetHashCode();
}
}
然后可以调用上面的类
例如:IList<BaseTag> listnew = list.Distinct(new Comparint<BaseTag>("BaseName")).ToList();
过滤list中 字段BaseName 相同的