Lambda expression to capture all values within a dictionary

Question

I have a LINQ query that returns all values inside a Dictionary, something conditional:

var apps =
from entry in shape.Decorators
where entry.Value == DecoratorLayoutStyle.App
select entry.Key;

shape.Decorators are

Dictionary<Shape, DecoratorLayoutStyle>

Is there something patience and / or can I use a combination of lambda or something like that?

+2

c # lambda linq

geejay Aug 18 09 at 14:42

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5 answers

This looks very poor to me, I think you could use extension functions instead of from / select linq syntax, but it wouldn't be too different.

More importantly, I'm not sure if you want terser. The current format is very readable and clearly documents what you are trying to do.

+3

brien Aug 18 09 at 14:45

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var apps = shape.Decorators
                     .Where(e => e.Value ==  DecoratorLayoutStyle.App)
                     .Select(e => e.Key);

Do you think this is the end?

Personally, I prefer the query syntax, when I have more than one LINQ operator, all the operators I use can be translated to it.

+2

R. Martinho Fernandes Aug 18 09 at 14:44

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var apps = Shape.Decorators.Where(x => x.Value == DecoratorLayoutStyle.App)
                           .Select(x => x.Key);

+1

Mehrdad afshari Aug 18 09 at 14:44

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Just to be different.

var apps = shape.Decorators.Keys
  .Where(k => shape.Decorators[k] == DecoratorLayoutStyle.App);

0

Amy B Aug 18 '09 at 14:59

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Will · Accepted Answer · 2009-08-18T14:46:04+0000

var apps = shape.Decorators
                .Where(x=>x.Value == DecoratorLayoutStyle.App)
                .Select(x=>x.Key);

I think your truth is beautiful.

Lambda expression to capture all values ​​within a dictionary