I have a string like 20090101 and I want to compare it with ????01??.
if (input == "----01--") { .... }
How can I compare the 5th and 6th characters with "01"?
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I mean that if my input is same with ****01** . For example: if(input=="20090101") { ... } In this compare, 01 is more important for me . How can I specify 01 char ? thanksIrgat– Irgat2010-03-28 01:02:19 +00:00Commented Mar 28, 2010 at 1:02
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That looks suspiciously like a date. Are you trying to match a date representing any day in January of any year?Mark Byers– Mark Byers2010-03-28 01:18:42 +00:00Commented Mar 28, 2010 at 1:18
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I have updated your question to make it more clear based on your comment.Mark Byers– Mark Byers2010-03-28 01:32:14 +00:00Commented Mar 28, 2010 at 1:32
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5 Answers
Update: After seeing your comment I think you should parse the string as a DateTime:
string s = "20090101";
DateTime dateTime;
if (DateTime.TryParseExact(s, "yyyyMMdd", null, DateTimeStyles.None, out dateTime))
{
if (dateTime.Month == 1)
{
// OK.
}
}
else
{
// Error: Not a valid date.
}
Comments
I think this may be what you want:
if (input.Substring(4, 2) == "01")
{
// do something
}
This will get a two character substring of input (starting at character 5) and compare it to "01".
1 Comment
Sam Harwell
This will throw an exception if the input is less than 6 characters.
you should create a regex expression. to check if the 4th and 5th byte is 01, you can write
var r = new Regex("^.{4}01$");
if(r.Match(str) ...) ...
2 Comments
Mark Byers
The
$ probably shouldn't be there.
Jordão
How about
@"^\d{4}01\d\d$"?MSDN has a great article on comparing strings, but you may want to refer to the String documentation for specific help, most notably: String.Compare, String.CompareTo, String.IndexOf, and String.Substring.
Comments
As Bauer said you can use String functions, also you can convert string to Char Array and work with it char by char
