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You can use String.Insert() method to achieve.<br />
<br />

<pre><code id="code-20-40289635-1">StudentNumber = '0003439989';
StudentNumber = StudentNumber.Insert(2,'-');
StudentNumber = StudentNumber.Insert(8,'-');</code></pre>
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You can use String.Insert() method to achieve.



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

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I've requested that this question be closed as follows:<br />
<br />
Accepted answer: 0 points for dshi15's comment <a href="https://www.experts-exchange.com/questions/28507017/Format-data-in-gridview-column.html?anchorAnswerId=40307592#a40307592" rel="ugc">#a40307592</a><br />
<br />
for the following reason:<br />
<br />
I tested and it doesn't work and I need declare two strings to accomplish it.
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I've requested that this question be closed as follows:

Accepted answer: 0 points for dshi15's comment #a40307592 [https://www.experts-exchange.com/questions/28507017/Format-data-in-gridview-column.html?anchorAnswerId=40307592#a40307592]

for the following reason:

I tested and it doesn't work and I need declare two strings to accomplish it.

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I tested and it doesn't work and I need declare too string to accomplish it.
</div>


I tested and it doesn't work and I need declare too string to accomplish it.

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<div class="content wysiwyg-content">
Hi Expert,<br />
<br />
I have a gridview column Student number is 0003439989, how I can format them use '99-9999-9999' format?<br />
<br />
Thanks in advance.
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Hi Expert,

I have a gridview column Student number is 0003439989, how I can format them use '99-9999-9999' format?

Thanks in advance.

Format data in gridview column

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