Format data in gridview column

Hi Expert,

I have a gridview column Student number is 0003439989, how I can format them use '99-9999-9999' format?

Thanks in advance.
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dshi15Asked:
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Priya SudharsanProgrammer AnalystCommented:
You can use String.Insert() method to achieve.

StudentNumber = '0003439989';
StudentNumber = StudentNumber.Insert(2,'-');
StudentNumber = StudentNumber.Insert(8,'-');

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dshi15Author Commented:
I tested and it doesn't work and I need declare too string to accomplish it.
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dshi15Author Commented:
I've requested that this question be closed as follows:

Accepted answer: 0 points for dshi15's comment #a40307592

for the following reason:

I tested and it doesn't work and I need declare two strings to accomplish it.
0
dshi15Author Commented:
I tested and it doesn't work and I need declare too string to accomplish it.
0
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