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C# Programming questions specific to the Microsoft C# language. See also the forum Beginning Visual C# to discuss that specific Wrox book and code.
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Old September 21st, 2007, 06:15 AM
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Default String Mystery

I am confused between String And StringBuilder after reading an amazing article.

http://dotnetspider.com/kb/Article3378.aspx

I do not understand that the author explains the right or wrong idea.

Can anyone help me and tell that what is the best.

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Old September 21st, 2007, 06:25 AM
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Well as with all things in programming there are almost no definites but in general if you are building a long string from many parts then using the StringBuilder class is better.
If you've got a particular instance where you can't decide then post it here although performance measuring is hard, you need to know in what circumstances the code is run, web or desktop, multiple users or one at a time, processor count, threading etc.
Also String has many methods that StringBuilder doesn't so you don't always have a choice.

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Joe (Microsoft MVP - XML)
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Old September 21st, 2007, 08:12 AM
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I thought the article was pretty straight forward. In a nutshell...

If you are building a string from user input use a String because the user won't be able to type fast enough to see a difference.

If you are sifting through a large amount of data, say, scanning for a specific word or character, use StringBuilder to concat the resulting string.

One other thing, StringBuilder will expose the underlying array of characters for editing where String will not. (There is the Chars array but it's read only). So, if you wanted to scan a string and replace certain characters you want StringBuilder.


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Old October 6th, 2007, 04:19 PM
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I wrote an article about this a while ago:

http://blogs.bdnet.co.uk/dominicz/ar...atenation.aspx

Its a huge performance benefit too.

Regards,

Dom
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