Question

可能重复：
Convert string to DateTime in c#

如何通过格式将字符串转换为DateTime？

Convert.ToDateTime("12/11/17 2:52:35 PM")

结果为12/11/2017 02:52:35 PM，这是不正确的，因为我的期望是11/17/2012 02:52:35 PM

Answer 1

您正在寻找DateTime.ParseExact()。

DateTime.ParseExact(myStr, "yy/MM/dd h:mm:ss tt", CultureInfo.InvariantCulture);

Answer 2

使用DateTime.ParseExact()方法。

将指定的日期和时间字符串表示形式转换为它 DateTime等效使用指定的格式和特定于文化格式信息。字符串表示的格式必须匹配准确的指定格式。

   DateTime result = DateTime.ParseExact(yourdatestring, 
                                        "yy/MM/dd h:mm:ss tt",             
                                         CultureInfo.InvariantCulture);

Answer 3

最好使用DateTime.*Parse方法之一。

这些字符串表示DateTime，格式字符串（或它们的数组）和其他一些参数。

custom format string为yy/MM/dd h:mm:ss tt。

所以：

var date = DateTime.ParseExact("12/11/17 2:52:35 PM", 
                               "yy/MM/dd h:mm:ss tt"
                               CultureInfo.InvariantCulture);

Answer 4

您需要指定culture of the string：

// Date strings are interpreted according to the current culture. 
// If the culture is en-US, this is interpreted as "January 8, 2008",
// but if the user's computer is fr-FR, this is interpreted as "August 1, 2008" 
string date = "01/08/2008";
DateTime dt = Convert.ToDateTime(date);            
Console.WriteLine("Year: {0}, Month: {1}, Day: {2}", dt.Year, dt.Month, dt.Day);

// Specify exactly how to interpret the string.
IFormatProvider culture = new System.Globalization.CultureInfo("fr-FR", true);

// Alternate choice: If the string has been input by an end user, you might  
// want to format it according to the current culture: 
// IFormatProvider culture = System.Threading.Thread.CurrentThread.CurrentCulture;
DateTime dt2 = DateTime.Parse(date, culture, System.Globalization.DateTimeStyles.AssumeLocal);
Console.WriteLine("Year: {0}, Month: {1}, Day {2}", dt2.Year, dt2.Month, dt2.Day);

/* Output (assuming first culture is en-US and second is fr-FR):
    Year: 2008, Month: 1, Day: 8
    Year: 2008, Month: 8, Day 1
 */

Answer 5

试试这个

dateValue = DateTime.ParseExact(dateString,
                                "yy/MM/dd hh:mm:ss tt",
                                new CultureInfo("en-US"),
                                DateTimeStyles.None);

“tt”是AM / PM指示符。

如何通过格式将字符串转换为Datetime？

5 个答案: