如何:将字符串转换为 DateTime(C# 编程指南) - C# 编程指南

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如何:将字符串转换为 DateTime(C# 编程指南)

发布于 2019-11-12 字数1621 浏览 828 评论 0

通常程序需要支持用户以字符串值的形式输入日期。若要将基于字符串的日期转换为 System..::.DateTime 对象,可以使用 Convert..::.ToDateTime(String) 方法或 DateTime..::.Parse 静态方法,如下面的示例所示。

示例

C#  复制代码
// 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
 */

请参见

参考

字符串(C# 编程指南)

修订记录

日期

修订

原因

2008 年 7 月

新增主题。

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