Append string without hard coded value

Question

I have a string which looks like:

A5050MM

What I am trying to achieve is to append the end of the string so it becomes:

A5050MM01
A5050MM02
...

Currently I am doing this as follows:

string sn = "A5050MM";

for (int i = 0; i <= 99; i++)
{
   string appendVal = i < 10 ? "0" + i : i.ToString();
   string finalsn = string.Concat(sn, appendVal);
   Console.WriteLine(finalsn);
}

This works but as you can see I am hardcoding the "0" because if I don't then the output will be A5050MM1, A5050MM2 ... until 9.

My question is there another way to achieve this without hard coding the "0" or is this the only approach I will have to follow?

Thanks in advance for your help.

Try with leading zero: learn.microsoft.com/en-us/dotnet/standard/base-types/… — SehaxX
– SehaxX, Commented Nov 8, 2018 at 14:03
string finalsn = sn + i.ToString("d2"); Note d2 format string - 2 digits — Dmitrii Bychenko
– Dmitrii Bychenko, Commented Nov 8, 2018 at 14:04

Dmitrii Bychenko · Accepted Answer · 2018-11-08 14:13:36Z

6

Try using formatting (Note d2 format string - at least 2 digits):

 for (int i = 0; i <= 99; i++)
 {
     // sn followed by i which has at least 2 digits 
     string finalsn = $"{sn}{i:d2}";
     Console.WriteLine(finalsn);
 }

edited Nov 8, 2018 at 14:13

answered Nov 8, 2018 at 14:05

Dmitrii Bychenko

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1 Comment

Izzy Over a year ago

Thank you for your help

Zohar Peled · Accepted Answer · 2018-11-08 14:10:32Z

4

You can use the overload of ToString that takes a format:

string sn = "A5050MM";

for (int i = 0; i <= 99; i++)
{
   string finalsn = string.Concat(sn, i.ToString("00"));
   Console.WriteLine(finalsn);
}

See a live demo on rextester.

edited Nov 8, 2018 at 14:10

answered Nov 8, 2018 at 14:04

Zohar Peled

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4 Comments

Izzy Over a year ago

Hi, I get the following error with this Argument 1: cannot convert from 'string' to 'System.IFormatProvider'

Zohar Peled Over a year ago

Works fine for me... I've added a live demo link.

Izzy Over a year ago

I think it was causing an error because before the edit you had appendVali.ToString("00")); and now I did i.ToString("00") and it works as expected. Thanks for your help I will accept this as you was the first to answer

Zohar Peled Over a year ago

Yeah, that was a typo... Glad to help :-)

SehaxX · Accepted Answer · 2018-11-08 14:07:27Z

0

you can use also the D2 in toString liek

        string sn = "A5050MM";

        for (int i = 0; i <= 99; i++)
        {
           string finalsn = string.Concat(sn, i.ToString("D2"));
           Console.WriteLine(finalsn);
        }

answered Nov 8, 2018 at 14:07

SehaxX

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Comments

JuanDM · Accepted Answer · 2018-11-08 14:10:15Z

0

You can use PadLeft function

    string sn = "A5050MM";
    for (int i = 0; i <= 99; i++)
    {
        string finalsn = sn + i.ToString().PadLeft(2, '0');
        Console.WriteLine(finalsn);
    }

answered Nov 8, 2018 at 14:10

JuanDM

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Comments

shamp00 · Accepted Answer · 2018-11-08 14:11:42Z

0

Enumerable.Range(0, 99)
    .Select(x => String.Format("A5050MM{0:d2}", x))
    .ToList()
    .ForEach(x => Console.WriteLine(x));

answered Nov 8, 2018 at 14:11

shamp00

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