Display format of character columns in a gridview like Access?

[Savvoulidis Iordanis]

I have a character(15) column filled with numbers, in my SQL database. I need
it to display like it does in Access when I set a format for the column, like
"000-000-000-000-000". How do I display the values the same way in a gridview
column? I can't manage to set the DataformatString properly.

TIA

 

[David Wier]

What format doesn't work that you have tried for the DataFormatString
property?

David Wier
http://aspnet101.com
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[Savvoulidis Iordanis]

I tried the following for DataFormatString:

{0:00000-00000-00000}
{0:"00000-00000-00000"}
{0:00000\-00000\-00000}
{0:99999-99999-99999}

What I want is to display the character data 123451234512345 as
12345-12345-12345