Question

I have the current method in a helper file to bind monthly days to a dropdown and I wonder how I should modify it to add a leading 0 to 1-9?

public DropDownList PopulateDay(DropDownList ddlControlDay)
{
    for (int i = 0; i <= 31; i = i + 1)
        ddlControlDay.Items.Add(i.ToString("D2"));
        return ddlControlDay;
}

I could convert to string, check length/modify and parse to int but is there a better way?

Thanks in advance.

Answer 1

The format "D02" will pad with zeroes up to the limit. See Custom Numeric Format Strings.

Using LINQ, it might be:

blah.DataSource = Enumerable.Range(1,30).Select(x => x.ToString("D02"));
// or with Items.AddRange, perhaps

Happy coding.

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And please fix the formatting of your code and/or use braces on the loop. I always use braces because then there is no “fake dangling code” like in the post 🙂