How to convert list of strings to string in c#

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public List<Movie> mType(List<string> fType)
       {
           List<Movie> fMovie = new List<Movie>();
           foreach(Movie movie in ListOfMovies)
           {
               if (fType = movie.Type)//this is where the error is
               {
                   fMovie.Add(movie);
               }//end of if
           }//end of foreach
           return fMovie;
       }

Cannot implicitly convert type 'string' to 'System.Collections.Generic.List<string>'

This is the error i am getting, any help will be appreciated

Posted 11-Dec-14 5:11am

Member 10954859

Updated 11-Dec-14 5:51am

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Afzaal Ahmad Zeeshan 11-Dec-14 11:24am

On which line do you get error! There are other errors in your code too.

You cannot use '=' in this manner in the if statement either.

Member 10954859 11-Dec-14 11:51am

yes it was == but that only applies to boolean, just starting to learn this language

Afzaal Ahmad Zeeshan 11-Dec-14 13:10pm

Then asking a question, of which even you don't have an answer to doesn't make any sense.

Marcin Kozub 11-Dec-14 12:04pm

Can you tell us what is ListOfMovies?

Afzaal Ahmad Zeeshan 11-Dec-14 13:10pm

This entire question seems gibberish to me, there are a lot of syntax problems and the variables are not even well formatted and provided.

Maciej Los 11-Dec-14 13:56pm

Can you provide a bit more details?

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Kornfeld Eliyahu Peter · Answer 1 · 2014-12-11T05:17:00

I assume you want to check that movie type is one of the strings in the list...
Use List<T>.Contains(T)[^] method...

C#

if (fType.Contains(movie.Type))
{
  // ...
}

[Edit: Matt T Heffron]
If the fType is not very short, then this can be optimized using a HashSet<string> :

C#

public List<Movie> mType(List<string> fType)
{
  List<Movie> fMovie = new List<Movie>();
  HashSet<string> typesMap = new HashSet<string>(fType);
  foreach(Movie movie in ListOfMovies)
  {
    if (typesMap.Contains(movie.Type))
    {
      fMovie.Add(movie);
    }//end of if
  }//end of foreach
  return fMovie;
}

And using Linq this would be:

C#

public List<Movie> mType(List<string> fType)
{
  HashSet<string> typesMap = new HashSet<string>(fType);
  return (from movie in ListOfMovies where typesMap.Contains(movie.Type) select movie).ToList();
}