Hi

I need to do a case insensitive search on a Generic list. I'm trying to use
the BinarySearch method but I get a complier error "cannot convert from
'System.Collections.CaseInsensitiveComparer' to
'System.Collections.Generic.IComparer<string>' "

List<string> list = new List<string>();
list.Add(str1);
list.Add(str2);
list.Add(str3);
int index = list.BinarySearch(otherstr, new CaseInsensitiveComparer());

What's the correct procedure?

Thanks
Andrew

try: int index = list.BinarySearch(otherstr,
StringComparer.OrdinalIgnoreCase);

or InvariantCultureIgnoreCase or CurrentCultureIgnoreCase. Note that
binary search only works on sorted data; depending on what you are
doing, a SortedList<TKey,TValue> might also be worth considering,
which has an IndexOfKey method.

Marc

Andrew Jocelyn <(E-Mail Removed)> wrote:
> I need to do a case insensitive search on a Generic list. I'm trying to use
> the BinarySearch method but I get a complier error "cannot convert from
> 'System.Collections.CaseInsensitiveComparer' to
> 'System.Collections.Generic.IComparer<string>' "
>
> List<string> list = new List<string>();
> list.Add(str1);
> list.Add(str2);
> list.Add(str3);
> int index = list.BinarySearch(otherstr, new CaseInsensitiveComparer());
>
> What's the correct procedure?

Use StringComparer.*IgnoreCase (where * is Ordinal, CurrentCulture or
InvariantCulture depending on your needs).

--
Jon Skeet - <(E-Mail Removed)>
Web site: http://www.pobox.com/~skeet
Blog: http://www.msmvps.com/jon_skeet
C# in Depth: http://csharpindepth.com

Here is a blog post that shows how to do a case insensitive search on a list of strings.

http://nickstips.wordpress.com/2010/...ntains-method/

Hope that helps!

Nick

> On Thursday, July 10, 2008 5:40 PM Andrew Jocelyn wrote:

> Hi
>
> I need to do a case insensitive search on a Generic list. I'm trying to use
> the BinarySearch method but I get a complier error "cannot convert from
> 'System.Collections.CaseInsensitiveComparer' to
> 'System.Collections.Generic.IComparer<string>' "
>
> List<string> list = new List<string>();
> list.Add(str1);
> list.Add(str2);
> list.Add(str3);
> int index = list.BinarySearch(otherstr, new CaseInsensitiveComparer());
>
> What's the correct procedure?
>
> Thanks
> Andrew


>> On Thursday, July 10, 2008 6:03 PM Jon Skeet [C# MVP] wrote:

>> Andrew Jocelyn <(E-Mail Removed)> wrote:
>>
>> Use StringComparer.*IgnoreCase (where * is Ordinal, CurrentCulture or
>> InvariantCulture depending on your needs).
>>
>> --
>> Jon Skeet - <(E-Mail Removed)>
>> Web site: http://www.pobox.com/~skeet
>> Blog: http://www.msmvps.com/jon_skeet
>> C# in Depth: http://csharpindepth.com


>>> On Monday, July 14, 2008 1:13 AM Marc Gravell wrote:

>>> try: int index = list.BinarySearch(otherstr,
>>> StringComparer.OrdinalIgnoreCase);
>>>
>>> or InvariantCultureIgnoreCase or CurrentCultureIgnoreCase. Note that
>>> binary search only works on sorted data; depending on what you are
>>> doing, a SortedList<TKey,TValue> might also be worth considering,
>>> which has an IndexOfKey method.
>>>
>>> Marc


>>> Submitted via EggHeadCafe - Software Developer Portal of Choice
>>> Assemblies in Folder Debug Build Checker
>>> http://www.eggheadcafe.com/tutorials...d-checker.aspx

Here is an example of how to write a case insensitive Contains method on a list of strings.

http://nickstips.wordpress.com/2010/...ntains-method/

Hope it helps!

Nick

> On Thursday, July 10, 2008 5:40 PM Andrew Jocelyn wrote:

> Hi
>
> I need to do a case insensitive search on a Generic list. I'm trying to use
> the BinarySearch method but I get a complier error "cannot convert from
> 'System.Collections.CaseInsensitiveComparer' to
> 'System.Collections.Generic.IComparer<string>' "
>
> List<string> list = new List<string>();
> list.Add(str1);
> list.Add(str2);
> list.Add(str3);
> int index = list.BinarySearch(otherstr, new CaseInsensitiveComparer());
>
> What's the correct procedure?
>
> Thanks
> Andrew


>> On Thursday, July 10, 2008 6:03 PM Jon Skeet [C# MVP] wrote:

>> Andrew Jocelyn <(E-Mail Removed)> wrote:
>>
>> Use StringComparer.*IgnoreCase (where * is Ordinal, CurrentCulture or
>> InvariantCulture depending on your needs).
>>
>> --
>> Jon Skeet - <(E-Mail Removed)>
>> Web site: http://www.pobox.com/~skeet
>> Blog: http://www.msmvps.com/jon_skeet
>> C# in Depth: http://csharpindepth.com


>>> On Monday, July 14, 2008 1:13 AM Marc Gravell wrote:

>>> try: int index = list.BinarySearch(otherstr,
>>> StringComparer.OrdinalIgnoreCase);
>>>
>>> or InvariantCultureIgnoreCase or CurrentCultureIgnoreCase. Note that
>>> binary search only works on sorted data; depending on what you are
>>> doing, a SortedList<TKey,TValue> might also be worth considering,
>>> which has an IndexOfKey method.
>>>
>>> Marc


>>>> On Tuesday, August 24, 2010 6:43 PM Nick Olsen wrote:

>>>> Here is a blog post that shows how to do a case insensitive search on a list of strings.
>>>>
>>>>
>>>>
>>>> http://nickstips.wordpress.com/2010/...ntains-method/
>>>>
>>>>
>>>>
>>>> Hope that helps!
>>>>
>>>>
>>>>
>>>> Nick


>>>> Submitted via EggHeadCafe - Software Developer Portal of Choice
>>>> Composite UI Pattern and RAD Development for Data Entry Applications, Part 1
>>>> http://www.eggheadcafe.com/tutorials...ns-part-1.aspx