Case-insensitive List<string>

[Mark Rae]

Hi,

Is it possible to create a case-insensitive List<stringcoll ection?

E.g.

List<stringMyLi st = new List<string>;
MyList.Add("MyS tring");

So that:

MyList.Contains ("mystring")
MyList.Contains ("MyString")
MyList.Contains ("MYSTRING")

all return true.

Google shows plenty of examples of how to do this with Dictionary<stri ng,
stringcollectio ns e.g.

Dictionary<stri ng, stringMyDiction ary = new Dictionary<stri ng,
string>(StringC omparer.Current CultureIgnoreCa se);

but I can't find an equivalent for List<string>...

Any assistance gratefully received.

Mark

[Nicholas Paldino [.NET/C# MVP]]

Re: Case-insensitive List&lt;string& gt;

Mark,

No, the List does not support any other comparison for Contains. You
will have to use the dictionary method to determine if you have a
case-insensitive string in your set.

Hope this helps.


--
- Nicholas Paldino [.NET/C# MVP]
- mvp@spam.guard. caspershouse.co m

"Mark Rae" <mark@markNOSPA Mrae.comwrote in message
news:OgdSVL%233 GHA.1068@TK2MSF TNGP05.phx.gbl. ..

Hi,
>
Is it possible to create a case-insensitive List<stringcoll ection?
>
E.g.
>
List<stringMyLi st = new List<string>;
MyList.Add("MyS tring");
>
So that:
>
MyList.Contains ("mystring")
MyList.Contains ("MyString")
MyList.Contains ("MYSTRING")
>
all return true.
>
Google shows plenty of examples of how to do this with Dictionary<stri ng,
stringcollectio ns e.g.
>
Dictionary<stri ng, stringMyDiction ary = new Dictionary<stri ng,
string>(StringC omparer.Current CultureIgnoreCa se);
>
but I can't find an equivalent for List<string>...
>
Any assistance gratefully received.
>
Mark
>

[Andreas Mueller]

Re: Case-insensitive List&lt;string& gt;

Mark Rae wrote:

Hi,
>
Is it possible to create a case-insensitive List<stringcoll ection?
>
E.g.
>
List<stringMyLi st = new List<string>;
MyList.Add("MyS tring");
>
So that:
>
MyList.Contains ("mystring")
MyList.Contains ("MyString")
MyList.Contains ("MYSTRING")
>
all return true.
>
Google shows plenty of examples of how to do this with Dictionary<stri ng,
stringcollectio ns e.g.
>
Dictionary<stri ng, stringMyDiction ary = new Dictionary<stri ng,
string>(StringC omparer.Current CultureIgnoreCa se);
>
but I can't find an equivalent for List<string>...
>
Any assistance gratefully received.
>
Mark
>
>

No, but you can get the information you need from a regular List<string>:

List<strings = new List<string>();
bool contains = null != s.Find(delegate (string str)
{
return str.ToLower().E quals("MyString ".ToLower() );
});


HTH,
Andy
--
You can email me directly by removing the NOSPAm below
xmenNOSPAm40@gm xNOSPAm.netNOSPAm

[Chris Taylor]

Re: Case-insensitive List&lt;string& gt;

Hi,

Performing case-insensitive comparisons using ToLower/ToUpper are very
expensive, a much more efficient means is to use String.Compare. For some
non-English languages the ToLower solution is also not accurate/correct. See
my post on case-insensitive string comparisons:

http://dotnetjunkies.com/WebLog/chris.taylor/archive/2004/08/07/21393.aspx

--
Chris Taylor

http://dotnetjunkies.com/weblog/chris.taylor

"Andreas Mueller" <me@privacy.net wrote in message
news:4nnplrFb5b 4aU1@individual .net...

Mark Rae wrote:
>

>Hi,
>>
>Is it possible to create a case-insensitive List<stringcoll ection?
>>
>E.g.
>>
>List<stringMyL ist = new List<string>;
>MyList.Add("My String");
>>
>So that:
>>
>MyList.Contain s("mystring")
>MyList.Contain s("MyString")
>MyList.Contain s("MYSTRING")
>>
>all return true.
>>
>Google shows plenty of examples of how to do this with Dictionary<stri ng,
>stringcollecti ons e.g.
>>
>Dictionary<str ing, stringMyDiction ary = new Dictionary<stri ng,
>string>(String Comparer.Curren tCultureIgnoreC ase);
>>
>but I can't find an equivalent for List<string>...
>>
>Any assistance gratefully received.
>>
>Mark

No, but you can get the information you need from a regular List<string>:
>
List<strings = new List<string>();
bool contains = null != s.Find(delegate (string str)
{
return str.ToLower().E quals("MyString ".ToLower() );
});
>
>
HTH,
Andy
--
You can email me directly by removing the NOSPAm below
xmenNOSPAm40@gm xNOSPAm.netNOSPAm

[Mark Rae]

Re: Case-insensitive List&lt;string& gt;

"Chris Taylor" <chris_taylor_z a@hotmail.comwr ote in message
news:%238McOh$3 GHA.5024@TK2MSF TNGP02.phx.gbl. ..

Performing case-insensitive comparisons using ToLower/ToUpper are very
expensive, a much more efficient means is to use String.Compare. For some
non-English languages the ToLower solution is also not accurate/correct.
See my post on case-insensitive string comparisons:
http://dotnetjunkies.com/WebLog/chri.../07/21393.aspx

Thanks everyone.