C# Linq .Contains list of string

Question

How check in where line.Contains("One") more than one string? For example how select file contains line with text element of "names" List.

private void button_Click(object sender, RoutedEventArgs e)
{
  List<string> names = new List<string>() { "One", "Two", "Three" };

  try
  {
    var files = from file in Directory.EnumerateFiles(@"D:\Logs\", "*.log", SearchOption.AllDirectories)
                from line in File.ReadLines(file)
                where line.Contains("One")
                select new
                {
                  File = file,
                  Line = line
                };

    foreach (var f in files)
    {
      Debug.WriteLine("{0}\t{1}", f.File, f.Line);
    }
    //MessageBox.Show(files.Count().ToString() + " record found.");
    }
  catch (UnauthorizedAccessException UAEx)
  {
    Console.WriteLine(UAEx.Message);
  }
  catch (PathTooLongException PathEx)
  {
    Console.WriteLine(PathEx.Message);
  }
}

Do you mean line.Contains("One") || line.Contains("names")? — juharr
– juharr, Commented Sep 1, 2016 at 12:22
Sorry, can you please clarify your question a little bit. The English is a little unclear. — LordWilmore
– LordWilmore, Commented Sep 1, 2016 at 12:23

Dennis_E · Accepted Answer · 2016-09-01 12:24:03Z

4

var files = from file in Directory.EnumerateFiles(@"D:\Stary komp\Logi\Logs2\", "*.log", SearchOption.AllDirectories)
            from line in File.ReadLines(file)
            where names.Any(name => line.Contains(name))
            select new
            {
              File = file,
              Line = line
            };

answered Sep 1, 2016 at 12:24

Dennis_E

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1 Comment

Michał Stojek Over a year ago

Thanks! Works fine.

Csaba Benko · Accepted Answer · 2016-09-01 12:33:01Z

0

You can probably try to use something like this:

line.Intersect(names).Any()

Although, I'm not sure whether it works inside a Linq expression?

answered Sep 1, 2016 at 12:33

Csaba Benko

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