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An Array error with if statement.

Posted on 2006-11-30
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Last Modified: 2010-04-16
I'm tring to split a string ie.(split[0],split[1]...etc) How do I code... If  (Split[1] == "" or null) do soming else?
Error: Index was outside the bounds of the array.

string body = ds.Tables[0].Rows[i]["body"].ToString();
                    string[] Split = body.Split('^');
                    if (Split[1] == "")//////////////////////// <<<<<<<<<<<< the error this line
                    {
                        lt.Text = body;
                    }
                    else
                    {
                        lt.Text = Split[1];
                    }
0
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Question by:quest_capital
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16 Comments
 
LVL 5

Expert Comment

by:Collindsouza
ID: 18050522
quest_capital

String Body is empty..
so Split[1] is outside the bounds.. i.e Split[1] does'nt exist
0
 
LVL 29

Expert Comment

by:anarki_jimbel
ID: 18050530
I guess the string was not split, so array will have just 1 element only. So index 1 is out of bounds (it's index for 2nd element)

Use either index 0, or check that second element exists:

if(Split.Length>1 && Split[1] == "")
0
 
LVL 5

Expert Comment

by:Collindsouza
ID: 18050555
i tried setting your code as follows

            string body = "a^b^c^d^e";
            string[] Split = body.Split('^');
                if (Split[1] == "")//////////////////////// <<<<<<<<<<<< the error this line
                {
                    Console.WriteLine(body);
                }
                else
                {
                    Console.WriteLine(Split[1]);
                }
 
and it does work...

however when i set string body = "";

it gives me an Error: Index was outside the bounds of the array.

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LVL 29

Expert Comment

by:anarki_jimbel
ID: 18050556
Yes, it seems it should be

if(Split.Length==1") // was not splitted
    lt.Text = body;
0
 
LVL 5

Accepted Solution

by:
Collindsouza earned 250 total points
ID: 18050567
you can put it in a loop as follows

            string body = ds.Tables[0].Rows[i]["body"].ToString();
            string[] Split = body.Split('^');
            for (int i=0; i < Split.Length - 1; i++)
            {
                if (Split[1] == "")
                {
                    Console.WriteLine(body);
                }
                else
                {
                    Console.WriteLine(Split[1]);
                    break; // condition met exit loop
                }
            }
0
 
LVL 29

Expert Comment

by:anarki_jimbel
ID: 18051027
2 Collindsouza

Your loop will never run if the string is not splitted, not once, because it checks that "i<0";

And obviously in the body of your loop you wanted Split[i], not Split[1]?

and I believe I showed the solution:

if(Split.Length==1") // was not splitted
    lt.Text = body;
else
   it.Text = Split[0] //// whatever value to set

Really, if the value should be set to the first element of array we don't need to run any chacks at all!
Just instead of if-else put one line only:


it.Text = Split[0]

That's enough, first element always exist.
0
 
LVL 5

Expert Comment

by:Collindsouza
ID: 18290914
why delete?? experts have provided a valid solution...
i suggest please split points between anarki_jimbel and Collindsouza
0
 
LVL 5

Expert Comment

by:Collindsouza
ID: 18365154
why delete?? experts have provided a valid solution...
i suggest please split points between anarki_jimbel and Collindsouza
0
 
LVL 7

Expert Comment

by:icr
ID: 18368612
I agree.
0
 
LVL 29

Expert Comment

by:anarki_jimbel
ID: 18380648
I agree too.
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 18432940
Well, I don't see any value to this question.  What's the point of checking Split[1] if Split.Length is 0?

Bob
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 18432944
This looks like a syntax error to me:
    if(Split.Length==1")

Bob
0
 
LVL 29

Expert Comment

by:anarki_jimbel
ID: 18440706
if(Split.Length==1")

of course it is :)

The question itself has no value (at least from my point of view).
However :
"
Comment from Collindsouza
Date: 01/11/2007 12:27AM PST
 Comment  

.... experts have provided a valid solution...  


I don't much care really :) ...
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