Formatting Phone Number by adding zeros to the left

Question

I have phone numbers like this :

452341

12

45789632

Is there a way i can format them like this way :

00452341

00000012

45789632

How do you declare the variable that stores the phonenumber? Is it an integer or a string? The answer is different — Steve, Jan 30 '17 at 11:05
If you're storing phone numbers as integers, *that* should be the problem you fix. They're not really numbers. You don't perform mathematics with them. In reality, they're strings. That just happen to be composed of digits. — Damien_The_Unbeliever, Jan 30 '17 at 11:08
If number is integer then you should have selected Ikram's answer. Ashkan's solution needs a conversion to string before padding. Later gives you intended result during conversion. — Vijay, Jan 30 '17 at 11:33
Integer class has the tostring method since it inherits from the Object class, — Mehdi Souregi, Jan 30 '17 at 11:52
but what i dont understand is how some people react with such questions with downvotes and some negatives comments, my question was clear, ive tried to look up if there is a similar questions in this site but in vain, the only possible duplicate is a little different because it does not contains the word "phonenumber" but it leads to the same answer. Besides you cannot delete your own question it says : "Sorry, this question has answers and cannot be deleted; flag it for moderator attention instead.", all you can do, is watch yourself being humiliated :) — Mehdi Souregi, Jan 30 '17 at 11:52

Ashkan Mobayen Khiabani · Accepted Answer · 2017-01-30T11:06:21.407

7

You cam use Padding:

Number.PadLeft(length, '0');

For example:

string num = "1234";
num.PadLeft(10, '0');

The result will be 0000001234

edited Jan 30 '17 at 11:06

answered Jan 30 '17 at 11:04

kgzdev · Answer 2 · 2017-01-30T11:18:14.180

4

ToString("D8")

Here - MSDN - Decimal ("D") Format Specifier

NOTE:

PadLeft(length, '0'); does not work for negative numbers

Ex: (-1).Padleft(5, '0') --> 000-1

edited Jan 30 '17 at 11:18

answered Jan 30 '17 at 11:05

kgzdev

score 3 · Answer 3 · answered Jan 30 '17 at 11:05

3

Use format with leading zeroes (Example for 8 symbols in number):

452341.ToString("D8");

if you have already strign use solution of Ashkan:

"452341".PadLeft(8, '0');

answered Jan 30 '17 at 11:05

Maksim Simkin

3 Answers3