How to use 'Any' in AsQueryable methods

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Hello,

I am trying to get my query to output all data, if given any parameter name and price or name only. I tried using 'any' but it gives me -- Cannot implicitly convert type 'bool' to -- error. Is their another function i can use or do i need to look into?

Thanks in advance.

C#

public database_ab getData(Query query)
  {

      var data = db.database_ab.AsQueryable();

      if (query.name != null)
      {
          data = data.Where(c => c.Name == query.name);
      }

      if (query.price != null)
      {
          data = data.Where(c => c.Price == query.price);
      }

      return data.Any();
  }

Posted 17-Mar-14 2:19am

miss786

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CHill60 17-Mar-14 8:28am

data is a var, but your function is expecting a database_ab ... whatever that is. Work out what you are actually trying to return and either derive that from within this function or change the return type of this function

2 solutions

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Pheonyx · Accepted Answer · 2014-03-17T02:42:00

Solution 1

You should change your method signature to:

C#

public List<database_ab> getData(Query query)</database_ab>

Then change your return statement to

C#

return data.ToList();

Your issue is that Any() returns a bool to see if there are any entries in your collection that match your query.

By making those changes you should get a list that contains 0 or more entries based on the success and failures of your other queries.

Posted 17-Mar-14 2:42am

Pheonyx

Comments

miss786 17-Mar-14 8:57am

Hi, thank you for your help. I have tried using 'List' and 'IEnumerable' as a method type but this makes my querystring such as api/data?name=app&price=78, return a blank screen on the client-side. This query type only allows me to search one value, whereas I would like to search both parameters name and price. Any help please.

Krunal Rohit · Accepted Answer · 2014-03-17T02:50:00

Solution 2

As per MSDN : Enumerable.Any<tsource> determines whether a sequence contains any elements.
Which means it is returning true/false (bool) value.

So either change the method signature or use other method(i.e shown in Solution #1 or may be FirstOrDefault()).

-KR

Posted 17-Mar-14 2:50am

Krunal Rohit