Case Insensitive String Comparison?

  • Thread starter Thread starter jpuopolo
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jpuopolo

All:

The String class has a CompareTo method, that compares to strings. Is there
a similar method that performs case-insensitive comparisons?

Thanks,
John
 
jpuopolo said:
The String class has a CompareTo method, that compares to strings. Is there
a similar method that performs case-insensitive comparisons?
Click to expand...

In 2.0 there are overloads of Compare which take a StringComparison,
allowing you to specify case- or culture-insensitive comparisons.
 
The String class has a CompareTo method, that compares to strings. Is
there a similar method that performs case-insensitive comparisons?
Click to expand...

If you can't use the other suggestions you could try to convert both
strings to upper or lower case before comparing them.
 
If you can't use the other suggestions you could try to convert both
strings to upper or lower case before comparing them.
Click to expand...

You need to be *very* careful with that, and consider which culture
you want to use when upper/lower-casing. You might think that
"mail".ToUpper() will give "MAIL" - but it doesn't in Turkey...

Jon
 
You need to be *very* careful with that, and consider which culture
you want to use when upper/lower-casing. You might think that
"mail".ToUpper() will give "MAIL" - but it doesn't in Turkey...
Click to expand...

Thanks. My programs have always either been with English or Danish texts so
I've never seen that problem with ToUpper or ToLower. What do you do when
you use ToUpper then - always ensure that the culture is set to something
you know so you know what "uppercase" means?
 
All:

The String class has a CompareTo method, that compares to strings. Is there
a similar method that performs case-insensitive comparisons?

Thanks,
John
Click to expand...


I used String.Compare() and it worked well.

Thanks, all....
 
Peter K said:
Thanks. My programs have always either been with English or Danish texts so
I've never seen that problem with ToUpper or ToLower. What do you do when
you use ToUpper then - always ensure that the culture is set to something
you know so you know what "uppercase" means?
Click to expand...

If you're using it for case-insensitive comparisons, you should specify
CultureInfo.InvariantCulture, or use ToUpperInvariant or
ToLowerInvariant.
 
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