iorewrocket.blogg.se - Format as iformat provider

#FORMAT AS IFORMAT PROVIDER UPDATE#

String format = "yyyy'-'MM'-'dd'T'HH':'mm" Ĭonsole.WriteLine(DateTime.ParseExact(text, format, us)) Ĭonsole.WriteLine(DateTime.ParseExact(text, format, sa))

The culture determines the default calendar as well, which will affect the resultĪs an example of the last point, consider the same exact string and format, interpreted in the culture of the US or Saudi Arabia: using System ĬultureInfo us = new CultureInfo("en-US") ĬultureInfo sa = new CultureInfo("ar-SA").

When parsing month and day names, those clearly depend on culture.

You could use : or / in your pattern, which mean culture-specific characters for the time separator or date separator respectively.

The format you use could be a standard date/time format, which means different patterns in different cultures.

The final tip, don't even bother trying to do this stuff from memory without Chris Sells' FormatDesigner.Why do we need to provide a IFormatProvider object? what is the point behind it? There are similar rules with "MM" for months and "mm" for minutes. Also, remember that "HH" is "zero-prepended 24-hour time" while "H" is "no-zeros 24-hour time" and "hh" and "h" are 12-hour times respectively. why do we need to provide a IFormatProvider object what is the point behind it It allows for culture-specific options.

Whether via String‘s constructors, or StringBuilder, or ToString overrides, or helper methods on String. NET Framework 1.0 was released, and more have joined the fray since.

NET, that means lots and lots of creation is so fundamental that a myriad of ways of creating them have existed since. String myNewDate = the escaping on the "M" in the string literal "GMT." That's because "M" by itself is a Month formatter, so we say " no seriously, I meant M" by using "\M". The following example illustrates a call to the DateTimeOffset.ParseExact(String, String, IFormatProvider) method to parse a date that must include a day, a. &0183 &32 Text processing is at the heart of huge numbers of apps and services, and in. TOTALLY OPTIONAL, but worth noting, assuming it was local time Public Function ToString ( format As String, formatProvider As. I have a DateTime variable which is holding the value as “ 1:29:54 PM” and I want to convert to “20050113132954.000”.ĭateTime foo = new DateTime(2005,1,13,13,29,54) public string ToString( string format, IFormatProvider formatProvider ). style - A bitwise combination of enumeration values that indicate the style elements that can be present in s.A typical value to specify is Float combined with AllowThousands. &0183 &32 ToString Method (String, IFormatProvider) FIURational Structure See Also Send Feedback Formats the value of the current instance using the specified format. s - A string that contains a number to convert. It's harder to parse these strings minus a little finger, and while harsh, this kind of punishment should deter others from making the same mistake. Double.Parse(String, NumberStyles, IFormatProvider) has the following parameters. This is the height of pure evil and anyone who does it should lose a pinky.

He had do a (culture senstive) DateTime.ToString() then started parsing it into the specific format he wanted. I caught a fellow trying to to a DateTime conversion recently. Since I used the double (MM) numeric formats, this isn't a problem in 99% of cultures, but I could change calendars inadvertantly in Thai, in the Maldives, or in Saudi Arabia where different calendars are used.ĭo NOT underestimate the power of ToString(IFormatProvider). Paul points out that the final call to ToString should use the InvariantCulture, lest I end up with odd characters. First, RichB points out that ':' is a format modifier itself that describes the hours separator . In the comments RichB and Paul van Brenk pointed out two bugs in my solution. Let us now see an example to implement the Convert.

#FORMAT AS IFORMAT PROVIDER UPDATE#

UPDATE: I write this update minus one pinky finger. &0183 &32 public static char ToChar (string val, IFormatProvider provider) Above, the parameter value is a string of length 1 or null and the parameter provider is an object that supplies culture-specific formatting information.