Add 0's to dates where it is missing in c#?

I have a string with a value in the format of

dd/mm/yyyy

Now I want to compare that to another string and check if they are equal, the other string can have the value of

dd/mm/yyyy

or sometimes when the day is between 1 and 9:

d/mm/yyyy

Sometimes when the month is between 1 and 9:

dd/m/yyyy

So there are a couple of instances where the string isn't equal but the actual date is. First I only saw that in some cases when the day is between 1-9 it doesn't start with a zero so I did:

createdDate = dateField.value.ToStrin开发者_如何学Gog().Substring(0, 10);
createdDate = createdDate.Trim();
if (createdDate.Length == 9)
    createdDate = "0" + createdDate;

but then I saw that it can be the same for month so there must be a better way to check this?

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Why not just parse both, one with the format string "dd/MM/yyyy" and one with the format string "d/M/yyyy" and compare the returned DateTime values? After all, the date being represented is the important part, not the string representation, presumably.

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You should use DateTime.Parse to convert both values to dates and then compare the dates.

DateTime.Parse("01/01/2001") == DateTime.Parse("1/1/2001")

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When it are strings, that represent dates, why don't you try to parse them to a date, and compare the date instances that you become ?

you just have to make sure that you use the correct pattern when parsing.

Check out the DateTime.TryParse method.

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I'd parse both dates into DateTimes and then compare them, that way you don't have to worry about different formats in the compare.

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First, parse the strings into values of type DateTime (DateTime.ParseExact), then use the standard equality comparer (==) to compare the dates.