得到重複的字段名稱的單一列表

我有一個List<Car> lstcar與性能得到重複的字段名稱的單一列表

name-Zen id-1211 MfYear-1990 Color-black 
name-Alto id-1521 MfYear-1990 Color-black 
name-Nano id-9911 MfYear-1990 Color-black 
name-800 id-1721 MfYear-1990 Color-black 
name-zen id-711 MfYear-1990 Color-black 
name-Swift id-9911 MfYear-1990 Color-black 
name-Nano id-1081 MfYear-1990 Color-black

我想基於名稱如重複項目的名稱：我希望「禪，納米」，但是當我做

List<Car> dup = lstcar.GroupBy(s => s.CarName) 
     .Select(grp => grp.FirstOrDefault()) 
     .OrderBy(s => s.CarName) 
     .ToList<Car>();

我得到dup有這個價值

name-Zen id-1211 MfYear-1990 Color-black 
name-Alto id-1521 MfYear-1990 Color-black 
name-Nano id-9911 MfYear-1990 Color-black 
name-800 id-1721 MfYear-1990 Color-black  
name-Swift id-9911 MfYear-1990 Color-black

但我想

name-Zen id-1211 MfYear-1990 Color-black  
name-Nano id-9911 MfYear-1990 Color-black  
name-zen id-711 MfYear-1990 Color-black 
name-Nano id-1081 MfYear-1990 Color-black

如何從一個List<T>獲取重複項？

來源

2013-04-01 user1799214

添加Where條款只得到更多的則1元和SelectMany組拼合結果到一個列表：

var duplications = lstcar.GroupBy(s => s.CarName) 
         .Where(g => g.Count() > 1) 
         .SelectMany(g => g) 
         .ToList();

我看你會不會禪和同組禪，所以你應該改變你的GroupBy爲：GroupBy(s => s.CarName.ToLower())

來源

2013-04-01 18:31:43 MarcinJuraszek

非常感謝！工作:) – user1799214

得到重複的字段名稱的單一列表

回答

相關問題