CODEWITHSUNDEEP
c#variablesfor-loop
Zain
Zain

Reputation: 53

How to retain number of digits for the variable in a for-loop

I wish to keep three digits for the variable in a for loop. E.g.

for (int i = 002; i <= 033; i++)
{
      string localFilename = @"\\psf\Home\Pictures\Maulavi\" + i + ".jpg";
      using (WebClient client = new WebClient())
      {
           MessageBox.Show(i.ToString());
           client.DownloadFile("http://eap.bl.uk/EAPDigitalItems/EAP566/EAP566_1_1_19_2-EAP566_Maulvi_January_1946_v43_no2_" + i + "_L.jpg", localFilename);
      }
}

However I changes to being just 2 and 3 etc. I want it to stay as 002 and 003 etc. How do I do that?

Upvotes: 1

Views: 98

Answers (5)

Mahedee
Mahedee

Reputation: 166

Use like following it's works as you want:

        char padChar = '0';
        for (int i = 002; i <= 033; i++)
        {
            string localFilename = @"\\psf\Home\Pictures\Maulavi\" + i + ".jpg";
            string padStr = i.ToString().PadLeft(3,padChar);
            using (WebClient client = new WebClient())
            {
                MessageBox.Show(i.ToString());
                client.DownloadFile("http://eap.bl.uk/EAPDigitalItems/EAP566/EAP566_1_1_19_2-EAP566_Maulvi_January_1946_v43_no2_" + padStr + "_L.jpg", localFilename);
            }
        }

For more about this visit: http://mahedee.net/padding-character-with-string/

Upvotes: 0

Eren Ers&#246;nmez
Eren Ers&#246;nmez

Reputation: 39085

You can do i.ToString("D3") or i.ToString("000").

For more information on number to string conversions, have a look at Standard Numeric Format Strings.

Upvotes: 1

Markus Gilli
Markus Gilli

Reputation: 237

Use string.Format(@"\psf\Home\Pictures\Maulavi{0:000}.jpg", i)

Format will also have better performance than string concatenation.

Upvotes: 0

Giorgi Nakeuri
Giorgi Nakeuri

Reputation: 35780

Format string with overload of function ToString():

for(int i = 2; i <= 33; i++)
{
    string localFilename = @"\\psf\Home\Pictures\Maulavi\" + i.ToString("000") + ".jpg";
}

Or you can use Format function:

String.Format("{0:000}", i);

Upvotes: 0

Salah Akbari
Salah Akbari

Reputation: 39956

Try ToString("000") like this:

for (int i = 002; i <= 033; i++)
{
    ....
    ....
    MessageBox.Show(i.ToString("000")); // 002 , 003 , ...
}

Upvotes: 2

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