When we execute Convert.ToDateTime('08/01/2014')
how does it convert to 1-Aug-2014 (ignore the format) and not to 8-Jan-2014?
As far as I saw, there is no mention of any format for the string parameter that is being passed on to this method.
If value is not null , the return value is the result of invoking the DateTime.Parse method on value using the formatting information in a DateTimeFormatInfo object that is initialized for the current culture.
First of all, it is Convert.ToDateTime("08/01/2014")
not Convert.ToDateTime('08/01/2014')
. Strings are represents with double quotes, not single quotes.
Convert.ToDateTime(string)
method uses CurrentCulture
as an IFormatProvider
by default. Here how it's implemented ;
public static DateTime ToDateTime(String value)
{
if (value == null)
return new DateTime(0);
return DateTime.Parse(value, CultureInfo.CurrentCulture);
}
And DateTime.Parse(string, IFormatProvider)
implemented as;
public static DateTime Parse(String s, IFormatProvider provider)
{
return (DateTimeParse.Parse(s, DateTimeFormatInfo.GetInstance(provider), DateTimeStyles.None));
}
From documentation ;
If value is not null, the return value is the result of invoking the DateTime.Parse method on value using the formatting information in a DateTimeFormatInfo object that is initialized for the current culture. The value argument must contain the representation of a date and time in one of the formats described in the DateTimeFormatInfo topic.
So, what is DateTimeFormatInfo
topic here exactly? It is the DateTimeFormatInfo
's information with DateTimeFormatInfo.GetAllDateTimePatterns
method .
Most probably your current thread culture has a MM/dd/yyyy
not dd/MM/yyyy
(or which character is your DateSeparator
of your CurrentCulture
because "/"
custom format specifier has a special meaning as replace me current culture or specified culture date separator ) as a standard date and time format .
You can see all standard date and time formats of your CurrentCulture
with;
var patterns = CultureInfo.CurrentCulture.
DateTimeFormat.
GetAllDateTimePatterns();
foreach (var format in patterns)
{
Console.WriteLine(format);
}
Let me give you an example; my current thread culture is Turkish ( tr-TR
). And it has dd.MM.yyyy
as a standard date and time format.
That's why when I write Convert.ToDateTime("02.01.2014")
in my code, it parses this string as January 2nd not February 1st .
@SonerGönül My CurrentCulture is "en-US"! – Salihdeen 3 mins ago
Exactly as I said, your en-US
has MM/dd/yyyy
but not dd/MM/yyyy
as a standard date and time format. That's why your 08/01/2014
string parsed with MM/dd/yyyy
pattern not dd/MM/yyyy
.
var patterns = CultureInfo.GetCultureInfo("en-US").
DateTimeFormat.
GetAllDateTimePatterns();
foreach (var format in patterns)
{
Console.WriteLine(format);
}
Result will be;
M/d/yyyy
M/d/yy
MM/dd/yy
MM/dd/yyyy <-- HERE!
yy/MM/dd
yyyy-MM-dd
dd-MMM-yy
dddd, MMMM dd, yyyy
MMMM dd, yyyy
dddd, dd MMMM, yyyy
dd MMMM, yyyy
dddd, MMMM dd, yyyy h:mm tt
dddd, MMMM dd, yyyy hh:mm tt
dddd, MMMM dd, yyyy H:mm
dddd, MMMM dd, yyyy HH:mm
MMMM dd, yyyy h:mm tt
MMMM dd, yyyy hh:mm tt
MMMM dd, yyyy H:mm
MMMM dd, yyyy HH:mm
dddd, dd MMMM, yyyy h:mm tt
dddd, dd MMMM, yyyy hh:mm tt
dddd, dd MMMM, yyyy H:mm
dddd, dd MMMM, yyyy HH:mm
dd MMMM, yyyy h:mm tt
dd MMMM, yyyy hh:mm tt
dd MMMM, yyyy H:mm
dd MMMM, yyyy HH:mm
dddd, MMMM dd, yyyy h:mm:ss tt
dddd, MMMM dd, yyyy hh:mm:ss tt
dddd, MMMM dd, yyyy H:mm:ss
dddd, MMMM dd, yyyy HH:mm:ss
MMMM dd, yyyy h:mm:ss tt
MMMM dd, yyyy hh:mm:ss tt
MMMM dd, yyyy H:mm:ss
MMMM dd, yyyy HH:mm:ss
dddd, dd MMMM, yyyy h:mm:ss tt
dddd, dd MMMM, yyyy hh:mm:ss tt
dddd, dd MMMM, yyyy H:mm:ss
dddd, dd MMMM, yyyy HH:mm:ss
dd MMMM, yyyy h:mm:ss tt
dd MMMM, yyyy hh:mm:ss tt
dd MMMM, yyyy H:mm:ss
dd MMMM, yyyy HH:mm:ss
M/d/yyyy h:mm tt
M/d/yyyy hh:mm tt
M/d/yyyy H:mm
M/d/yyyy HH:mm
M/d/yy h:mm tt
M/d/yy hh:mm tt
M/d/yy H:mm
M/d/yy HH:mm
MM/dd/yy h:mm tt
MM/dd/yy hh:mm tt
MM/dd/yy H:mm
MM/dd/yy HH:mm
MM/dd/yyyy h:mm tt
MM/dd/yyyy hh:mm tt
MM/dd/yyyy H:mm
MM/dd/yyyy HH:mm
yy/MM/dd h:mm tt
yy/MM/dd hh:mm tt
yy/MM/dd H:mm
yy/MM/dd HH:mm
yyyy-MM-dd h:mm tt
yyyy-MM-dd hh:mm tt
yyyy-MM-dd H:mm
yyyy-MM-dd HH:mm
dd-MMM-yy h:mm tt
dd-MMM-yy hh:mm tt
dd-MMM-yy H:mm
dd-MMM-yy HH:mm
M/d/yyyy h:mm:ss tt
M/d/yyyy hh:mm:ss tt
M/d/yyyy H:mm:ss
M/d/yyyy HH:mm:ss
M/d/yy h:mm:ss tt
M/d/yy hh:mm:ss tt
M/d/yy H:mm:ss
M/d/yy HH:mm:ss
MM/dd/yy h:mm:ss tt
MM/dd/yy hh:mm:ss tt
MM/dd/yy H:mm:ss
MM/dd/yy HH:mm:ss
MM/dd/yyyy h:mm:ss tt
MM/dd/yyyy hh:mm:ss tt
MM/dd/yyyy H:mm:ss
MM/dd/yyyy HH:mm:ss
yy/MM/dd h:mm:ss tt
yy/MM/dd hh:mm:ss tt
yy/MM/dd H:mm:ss
yy/MM/dd HH:mm:ss
yyyy-MM-dd h:mm:ss tt
yyyy-MM-dd hh:mm:ss tt
yyyy-MM-dd H:mm:ss
yyyy-MM-dd HH:mm:ss
dd-MMM-yy h:mm:ss tt
dd-MMM-yy hh:mm:ss tt
dd-MMM-yy H:mm:ss
dd-MMM-yy HH:mm:ss
MMMM dd
MMMM dd
yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK
yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK
ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
ddd, dd MMM yyyy HH':'mm':'ss 'GMT'
yyyy'-'MM'-'dd'T'HH':'mm':'ss
h:mm tt
hh:mm tt
H:mm
HH:mm
h:mm:ss tt
hh:mm:ss tt
H:mm:ss
HH:mm:ss
yyyy'-'MM'-'dd HH':'mm':'ss'Z'
dddd, MMMM dd, yyyy h:mm:ss tt
dddd, MMMM dd, yyyy hh:mm:ss tt
dddd, MMMM dd, yyyy H:mm:ss
dddd, MMMM dd, yyyy HH:mm:ss
MMMM dd, yyyy h:mm:ss tt
MMMM dd, yyyy hh:mm:ss tt
MMMM dd, yyyy H:mm:ss
MMMM dd, yyyy HH:mm:ss
dddd, dd MMMM, yyyy h:mm:ss tt
dddd, dd MMMM, yyyy hh:mm:ss tt
dddd, dd MMMM, yyyy H:mm:ss
dddd, dd MMMM, yyyy HH:mm:ss
dd MMMM, yyyy h:mm:ss tt
dd MMMM, yyyy hh:mm:ss tt
dd MMMM, yyyy H:mm:ss
dd MMMM, yyyy HH:mm:ss
MMMM, yyyy
MMMM, yyyy
Use this.
DateTime.ParseExact(string datetime, string format, IFormatProvider provider)
eg:
DateTime.ParseExact("08-01-2014", "MM-dd-yyyy", new CultureInfo("en-US"))
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