Check if a string within a list contains a specific string with Linq

Question

I have a List lt string gt  that has some items like this     Pre Mdd LH    Post Mdd LH    Pre Mdd LL    Post Mdd LL     Now I want to perform a condition that checks if an item in the list contains a specific string  something like   IF list contains an item that contains this string  To make it simple I want to check in one go if the list at least  contains for example an item that has Mdd LH in it   I mean something like   if myList Contains str   gt  str Contains  Mdd LH           Do stuff     Thanks

User · Answer

Thast should be easy enough  if  myList Any  s   gt  s Contains stringToCheck         do your stuff here

User · Answer

I think you want Any   if  myList Any str   gt  str Contains  Mdd LH       It s well worth becoming familiar with the LINQ standard query operators  I would usually use those rather than implementation-specific methods  such as List lt T gt  ConvertAll  unless I was really bothered by the performance of a specific operator   The implementation-specific methods can sometimes be more efficient by knowing the size of the result etc

User · Answer

Try this   bool matchFound   myList Any s   gt  s Contains  Mdd LH       The Any   will stop searching the moment it finds a match  so is quite efficient for this task

User · Answer

If yoou use Contains  you could get false positives  Suppose you have a string that contains such text   My text data Mdd LH  Using Contains method  this method will return true for call  The approach is use equals operator   bool exists   myStringList Any c  gt c     Mdd LH

User · Answer

LINQ Any   would do the job   bool contains   myList Any s   gt  s Contains pattern      Any    MSDN      Determines whether any element of a sequence satisfies a condition

[c#] Check if a string within a list contains a specific string with Linq

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