Data annotations - DisplayFormat - formatting string of numbers

Question

I have the following string: "10222002750400447092095835"

I want it to be displayed like this: 10 2220 0275 0400 4470 9209 5835

I tried doing the following, with no result at all:

[DisplayFormat(DataFormatString = "{0:00 0000 0000 0000 0000 0000 0000}", ApplyFormatInEditMode = true)]

or

[DisplayFormat(DataFormatString = "{0:## #### #### #### #### #### ####}", ApplyFormatInEditMode = true)]

What am I doing wrong?

For the case of simplicity, here: String.Format("{0:## #### #### #### #### #### ####}", "10222002750400447092095835");. The problem is exactly in the argument - its a string, and string is not IFormattable. But how can i omit that? This argument needs to be a string. — ojek
– ojek, Commented Feb 7, 2013 at 20:03
There you said it - you'd need to implement IFormattable yourself in order to use custom formats. See also stackoverflow.com/a/10512433/63733 — marapet
– marapet, Commented Feb 7, 2013 at 20:06

Community · Accepted Answer · 2017-05-23 10:27:58Z

1

I believe what you are looking for is String masking. See below.

CommunityBot

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answered Feb 7, 2013 at 20:09

James Shaw

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1 Comment

Well thanks. I couldn't exactly use a mask, but i created a custom attribute that does similar things. :)