Finding an item in a List using C#

by

You have a few options:

  1. Using Enumerable.Where:

    list.Where(i => i.Property == value).FirstOrDefault();       // C# 3.0+

  2. Using List.Find:

    list.Find(i => i.Property == value);                         // C# 3.0+
list.Find(delegate(Item i) { return i.Property == value; }); // C# 2.0+

Both of these options return default(T) (null for reference types) if no match is found.

As mentioned in the comments below, you should use the appropriate form of comparison for your scenario:

  • == for simple value types or where use of operator overloads are desired
  • object.Equals(a,b) for most scenarios where the type is unknown or comparison has potentially been overridden
  • string.Equals(a,b,StringComparison) for comparing strings
  • object.ReferenceEquals(a,b) for identity comparisons, which are usually the fastest

More Related Contents:

  1. Cleanest way to write retry logic?
  2. Casting interfaces for deserialization in JSON.NET
  3. How do I create 7-Zip archives with .NET?
  4. What is the use of ObservableCollection in .net?
  5. Regarding usage of Task.Start() , Task.Run() and Task.Factory.StartNew()
  6. Could not find a part of the path … bin\roslyn\csc.exe
  7. What .NET collection provides the fastest search
  8. Combining multiple Attributes to a single Attribute – Merge Attributes
  9. WebBrowser print settings
  10. How to retrieve the LoaderException property?
  11. DateTimePicker: pick both date and time
  12. Is there a serializable generic Key/Value pair class in .NET?
  13. How to convert HTML to XHTML? [closed]
  14. Selecting attribute values with html Agility Pack
  15. How do you bind an Enum to a DropDownList control in ASP.NET?
  16. C# – Regex for file paths e.g. C:\test\test.exe
  17. Entity framework raw SQL Query
  18. Download file with WebClient or HttpClient?
  19. How can I Unescape and Reescape strings in .net?
  20. Interoperating between Matlab and C#
  21. How do I force full post-back from a button within an UpdatePanel?
  22. All cases covered Bresenham’s line-algorithm [closed]
  23. Best practice for reconnecting SignalR 2.0 .NET client to server hub
  24. How to get current working directory path c#?
  25. How does the “Using” statement translate from C# to VB?
  26. Are immutable arrays possible in .NET?
  27. I need a Powerful Web Scraper library [closed]
  28. Ways to access a 32bit DLL from a 64bit exe
  29. Objects implicitly instantiated in vb.net?
  30. is there a elegant way to parse a word and add spaces before capital letters

Leave a Comment