LINQ to Entities does not recognize the method Boolean ContainsAny

问题

Error

LINQ to Entities does not recognize the method 'Boolean ContainsAny(System.String, System.String[])' method, and this method cannot be translated into a store expression.

Code

var predicate = FilterClients(clientRequest);
clients = db.Clients.Where(predicate).Include(x => x.Organization) 
.Include(x => x.Department).ToList();

private Expression<Func<Client, bool>> FilterClients(ClientRequest clientRequest)
{
   var predicate = PredicateBuilder.True<Client>();

   if (clientRequest.IsBySearchPatternFullName)
   {
      var searchPatternFullName = clientRequest.SearchPatternFullName.Trim();
      var matches = Regex.Matches(searchPatternFullName, @"\w+[^\s]*\w+|\w");
      var words = new List<string>();
      foreach (Match match in matches)
      {
         var word = match.Value;
         words.Add(word);
      }
      var wordArray = words.ToArray();
      predicate = predicate.And(x => x.LastName.ContainsAny(wordArray) || x.FirstName.ContainsAny(wordArray) || x.MiddleName.ContainsAny(wordArray));
   }
   return predicate;
}

There is similar question C# LINQ to Entities does not recognize the method 'Boolean'

But I would like to optimize this part somehow

 predicate = predicate.And(x => x.LastName.ContainsAny(wordArray) || x.FirstName.ContainsAny(wordArray) || x.MiddleName.ContainsAny(wordArray));

Any clue people?

回答1:

Oh! I just did it!

foreach (Match match in matches)
{
   var word = match.Value;                   
   predicate = predicate.And(x => x.LastName.Contains(word) || x.FirstName.Contains(word) || x.MiddleName.Contains(word));
}

回答2:

You can query against list of word in following way :

 predicate = predicate.And(x => wordArray.Contains(x.LastName) || wordArray.Contains(x.FirstName) || wordArray.Contains(x.MiddleName));

来源：https://stackoverflow.com/questions/47342632/linq-to-entities-does-not-recognize-the-method-boolean-containsany

标签

linq

entity-framework-6