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Linq Where and

I am needing to create a subset of a list<> and am doing it with Linq.

I initially made the subset list with one restrictor, and that worked fine.

var ListPatternSubset = from EnumPattern in ListPatterns
    where (EnumPattern.Length1 == EnumPiece.Length)
    select EnumPattern;//Create a subset for this piece length

but now I realize I need to narrow the subset not only be length but also by waste

var ListPatternSubset = from EnumPattern in ListPatterns
    where (EnumPattern.Length1 == EnumPiece.Length AndAlso EnumPattern.WastePer1 > 0)                         
select EnumPattern;//Create a subset for this piece length

I have tried using "and", "&&", "AndAlso", but nothing seems to work.

JimGuyer Tuesday, October 06, 2009 9:47 PM

It is &&. Document the compile error you get.

Hans Passant.

Marked As Answer byJimGuyer Wednesday, October 07, 2009 1:52 PM

nobugz Tuesday, October 06, 2009 10:13 PM

It is &&. Document the compile error you get.

Hans Passant.

Marked As Answer byJimGuyer Wednesday, October 07, 2009 1:52 PM

nobugz Tuesday, October 06, 2009 10:13 PM

&& is the correct syntax. If that didn't work I presume your issue has to do with data types (namely EnumPattern.WastePer1 not being numeric?).

syntaxeater Tuesday, October 06, 2009 10:15 PM

Yep, that worked fine. I don't know what I did wrong the first time with '&&' I couldn't duplicate the error, but anyhow, it is working fine now.

var ListPatternSubset = from EnumPattern in ListPatterns
where (EnumPattern.Length1 == EnumPiece.Length && EnumPattern.WastePer1 > 0)

select EnumPattern;//Create a subset for this piece length

JimGuyer Wednesday, October 07, 2009 1:50 PM

You can use google to search for other answers

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