Is there a way to do case insensitive replace on a string without using regular expression in C#?
something like this
string x = "Hello";
x = x.Replace("hello", "hello world");
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1Could you give us an example of what you mean?Ani– Ani2010-10-22 04:23:00 +00:00Commented Oct 22, 2010 at 4:23
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A good solution is found in this thread by @c-dragon-76 stackoverflow.com/questions/244531/…Jaider– Jaider2012-08-10 20:32:46 +00:00Commented Aug 10, 2012 at 20:32
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2 Answers
You can try something like
string str = "Hello";
string replace = "hello";
string replaceWith = "hello world";
int i = str.IndexOf(replace, StringComparison.OrdinalIgnoreCase);
int len = replace.Length;
str = str.Replace(str.Substring(i, len), replaceWith);
Have a look at String.IndexOf Method (String, StringComparison)
answered Oct 22, 2010 at 4:27
4 Comments
Nayan
I doubt that
Replace will be able to replace the string. Its a different matter that you got index by ignoring the case. Is it a tested example?Adriaan Stander
Yes, I have tested this. Just remember that I am retrieving the start index based on the search string, but replacing based on the sub string from the original string, so it will match.
Jaider
it doesn't work as we would expected in other situations... e.g. if
str = "Hello-Hello" it will return "hello world-hello world" but it's str="Hello-hello" it will return "hello world-hello"... this partial solution need to be redesign.
Chad
That only replaces the first occurrence, not all. If you where to put it in a loop and make it an extension method, that would be cool.
The following links may be of help.
Is there an alternative to string.Replace that is case-insensitive?
http://www.codeproject.com/KB/string/fastestcscaseinsstringrep.aspx
http://www.west-wind.com/weblog/posts/60355.aspx
There is also the Strings.Replace function in the Microsoft.VisualBasic assembly.
