what mean "IndexOf("?")" ?

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hi friends,

what mean this code

filename = verbs[1].Replace("/", "\\");
            if (filename.IndexOf("?") != -1)
            {
                // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                filename = filename.Substring(0, filename.IndexOf("?"));
            }

exactly

if(filename.IndexOf("?") != -1)

thank you

Posted 8-Jun-11 1:17am

guendouz bachir

Updated 8-Jun-11 1:23am

Tarun.K.S

v2

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4 solutions

Solution 2

The IndexOf method returns the position of the given substring inside a string and returns a number. If the substring is not found, it returns -1.

In your case the code inside the if statement will only execute if filename contains the "?" character.

See String.IndexOf()

Posted 8-Jun-11 1:21am

Kubajzz

Comments

lukeer 8-Jun-11 8:21am

IIRC, paths are not allowed to contain "?" characters. Therefore the code inside the if statement should never execute.

#realJSOP 8-Jun-11 10:31am

Whether or not the if condition will be satisfied is not germaine to the question at hand.

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RakeshMeena · Accepted Answer · 2011-06-08T01:20:00

Solution 1

This checks for the character/string part in the original string (-1 means that it is not part of the string). Before asking such questions you should try something yourself.

Posted 8-Jun-11 1:20am

RakeshMeena

#realJSOP · Accepted Answer · 2011-06-08T01:21:00

Solution 3

It means return the position of the first occurance of the '?' character. Really, a simple google search would have told you what the IndexOf method does.

EDIT ====================

Why was this 1-voted. It's the correct freakin' answer.

Posted 8-Jun-11 1:21am

#realJSOP

Updated 8-Jun-11 4:14am

v2

Comments

RaviRanjanKr 8-Jun-11 23:14pm

I am also not able to understand why these answer got platinum downvotes, by the way I voted 5 to your nice and perfect answer.

RaviRanjanKr · Accepted Answer · 2011-06-08T01:37:00

Solution 4

This method finds the first index of the char argument. It returns -1 if the char was not found.
Take a look C# IndexOf String Examples[^] for more Reference.

Posted 8-Jun-11 1:37am

RaviRanjanKr

Comments

#realJSOP 8-Jun-11 10:30am

I dn't know why your answer was 1-voted (although to be fair, your answer was submitted an hour after mine was). I voted your answer up to compensate.

RaviRanjanKr 8-Jun-11 23:12pm

Thanks John :)