Index and count must refer to a location within the string.?

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Hii ,

I am trying to remove first 2 char from my string ..

But its throwing Index and count must refer to a location within the string. error

lblDataForYear.Text = expYear.ToString() + "/" + (expYear + 1).ToString().Remove(0,2);

Posted 27-Nov-14 1:58am

Torakami

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[no name] 27-Nov-14 8:07am

What is the expYear value (I/P)?

what is you expected O/p ?

Torakami 27-Nov-14 8:17am

its a integer value .. 2014

the way i want to print is 2014/15

[no name] 27-Nov-14 8:26am

Your syntax is correct, however put a breakpoint and check the expYear value.

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Marcin Kozub · Accepted Answer · 2014-11-27T02:08:00

Solution 1

Hi,

Assuming that expYear is numeric type and has 4 digits try this way:

C#

lblDataForYear.Text = string.Format("{0}/{1}", expYear, (expYear + 1).ToString().Substring(2, 2));

Cheers!

Posted 27-Nov-14 2:08am

Marcin Kozub

Updated 27-Nov-14 2:13am

v4

Comments

Torakami 27-Nov-14 8:19am

Thanks brother ... you rock ... it worked as expected ... cool stuff

Marcin Kozub 27-Nov-14 8:20am

Happy to help you :)

Afzaal Ahmad Zeeshan · Accepted Answer · 2014-11-27T02:24:00

It is clear from the exception message that the actual error is coming from the .Remove() method you're calling on the String. The parameters that you're passing must be valid, I mean that the total number of the characters in your string must be enough for this function to work on. As far as I know the expYear is either an empty string or it contains only one character. I have an example of this problem, where this error message is shown because the string contained only one character. https://dotnetfiddle.net/DTspxj[^]

C#

// variable
int year = 1;
// write the string without first two characters
Console.WriteLine(year.ToString().Remove(0, 2));
// but error! Index and count must refer to a location within the string.

However this second code, is working even if the variable contains two characters, but I added 2 more to make it 1995, and it gave me 95.

C#

// variable
int year = 1995;
// write the string without first two characters
Console.WriteLine(year.ToString().Remove(0, 2));

So what might you do to minimize this, is to check if the characters are enough before you proceed as,

C#

if(expYear.Length > 1) {
   // if contains more than 1 character, then
   lblDataForYear.Text = expYear.ToString() + "/" + 
                         (expYear + 1).ToString().Remove(0,2);
}