assign value using linq

Question

public class Company       public int id   get  set        public int Name   get  set       List lt Company gt  listofCompany   new List lt Company gt       this is my collection of company list I want to assign values to Name property using LINQ  listofCompany Where d   gt  d Id   1      I want to assing name property of company id 1   how do I assign it

User · Accepted Answer

using Linq would be    listOfCompany Where c  gt  c id    1  FirstOrDefault   Name    Whatever Name     UPDATE  This can be simplified to be      listOfCompany FirstOrDefault c  gt  c id    1  Name    Whatever Name       UPDATE  For multiple items  condition is met by multiple items     listOfCompany Where c  gt  c id    1  ToList   ForEach cc   gt  cc Name    Whatever Name

User · Answer

Be aware that it only updates the first company it found with company id 1  For multiple    from c in listOfCompany where c id    1 select c  First   Name    Whatever Name     For Multiple updates    from c in listOfCompany where c id    1 select c   gt   c Name    Whatever Name    return c

User · Answer

You can create a extension method   public static IEnumerable lt T gt  Do lt T gt  this IEnumerable lt T gt  self  Action lt T gt  action        foreach var item in self            action item           yield return item            And then use it in code   listofCompany Do d  gt d Id   1   listofCompany Where d  gt d Name Contains  Inc    Do d  gt d Id   1

User · Answer

It can be done this way as well  foreach  Company company in listofCompany Where d   gt  d Id   1   ToList                                            do your stuff here                     company Id  2                      company Name   Sample

[c#] assign value using linq

UPDATE

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