Just curious if I can substring string only when String.Length is greater than or equal to 20 without using If or Try catch ?
Thanks!
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6 Answers
Ummh what have you tried? Just check beforehand:
if(input.Length >= 20)
{
input = input.Substring(0,20);
}
If you really don't want to use an if statement you could use Linq which just obfuscates the solution though and is less performant in this case:
input = new string(input.Take(20).ToArray());
Or technically this doesn't use an if statement either:
input = input.Length >= 20 ? input.Substring(0,20) : input;
Comments
Use a string extension. It still uses an IF, however, it makes your code cleaner when using it.
public static string Left(this string input, int length)
{
string result = input;
if (input != null && input.Length > length)
{
result = input.Substring(0, length);
}
return result;
}
usage:
input = input.Left(20);
Comments
someString = someString.Substring(0,Math.Min(20,someString.Length));
2 Comments
user570715
can you read question again? I am wondering I can achieve without using if or try catch???
Adam Oakley
Nice! I like this one!
just out of mind ...
a.SubString(Math.Min(startPos, a.Length), Math.Min(a.Length - Math.Min(startPos, a.Length),
requestedLen - Math.Min(startPos, a.Length);
oh my god, my brain burns, time to hit the sack...
Comments
This really needs clarification, as you don't state what it is you want to happen if it's less than 20. Return the original string or return null?
Anyhow, you can use a ternary operator if you don't want a if block:
(someString.Length < 20) ? someString : someString.SubString(...
Comments
There's no need for a try-catch if you ensure that the substring range is within the original string range. Of course, you cannot get a substring that is longer than the original one.
