自定义对象的组列表，如果count> 1，则返回 [英] Group list of custom objects and return if count >1

问题描述

嗨朋友我需要根据字段 Cusip 对对象列表进行分组。并且需要返回有计数的新列表> 1



请帮助

  public   class  AccruedClass 
 {
  public   string  Cusip { get ;  set ; } 
  public   string 符号{ get ;  set ; } 
  public   double  AccruedInterest { get ;  set ; } 
  public   double  PriceFactor { get ;  set ; } 
  public   double 数量{ get ;  set ; } 
  public   double  CalcAcc { get  { return  AccruedInterest * PriceFactor * Quantity; } 
} 

列表< AccruedClass> ac =  new 列表< AccruedClass>（）; 
 ac = validaccrued（）; 
 ac.ForEach（item = >  Console.Write（item.Cusip +  < span class =code-string>， + item.AccruedInterest +  ， + item.Quantity +   \ n））; 

解决方案

分组很简单：

  var  grouped = ac.GroupBy（a = >  a.Cusip）; 

但是你只想要那些拥有多个成员的组？ br />
试试这个：

 List< AccruedClass> grouped = ac.GroupBy（a = >  a.Cusip）。其中（g = >  g .Count（）>   1 ）。SelectMany（g = >  g.ToList（））。ToList（）; 

忘记编码HTML标记字符... [/编辑]

Hi Friends i need to group a list of objects based on a field Cusip . and need to return new list which has count>1

Please help

public class AccruedClass
        {
            public string Cusip { get; set; }
            public string Symbol { get; set; }
            public double AccruedInterest { get; set; }
            public double PriceFactor { get; set; }
            public double Quantity { get; set; }            
            public double CalcAcc { get { return AccruedInterest * PriceFactor * Quantity; } }
        }

List<AccruedClass> ac = new List<AccruedClass>();
ac = validaccrued();
ac.ForEach(item => Console.Write(item.Cusip + "," + item.AccruedInterest + "," + item.Quantity + "\n"));

解决方案

Grouping is easy:

var grouped = ac.GroupBy(a => a.Cusip);

But you want only those groups with more than one member?
Try this:

List<AccruedClass> grouped = ac.GroupBy(a => a.Cusip).Where(g => g.Count() > 1).SelectMany(g => g.ToList()).ToList();

[edit]Forgot to encode HTML tag characters...[/edit]

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