将YYYYMMDD字符串日期转换为datetime值 [英] Convert YYYYMMDD string date to a datetime value

问题描述

可能重复：

将字符串转换为c＃中的DateTime

Possible Duplicate:
Convert string to DateTime in c#

一个问题

我得到一个实际从directoryInfo获取的字符串值。
我想要完成的是将字符串值转换为日期值进行比较。

I got a string value that actually get from directoryInfo. What i wanted to accomplish is to convert the string value to a date value for making comparison.

文件夹名称就是这样的C：\FOLD \20111120
正确的另一个文件夹路径就像这样
C：\FOLD\20111021

The folder name is sample like this C:\FOLD\20111120 and properly another folder path is like this C:\FOLD\20111021

20111120其实是一个日期格式。我试图把它转换成日期格式，做一些比较，决定删除整个目录。

20111120 is actually a date format. I am trying to convert it into date format to made some comparison decide to deleting the whole directory or not.

我想我将粘贴我的代码这里

I think i shall paste my code here

DirectoryInfo dir = new DirectoryInfo(_FolderPath);

foreach (DirectoryInfo f in dir.GetDirectories())
{
     String folderName = f.ToString();
     DateTime ConDt = Convert.ToDateTime(folderName);
     Console.WriteLine(ConDt);
     Console.WriteLine(ConDt.GetType());
   //Console.WriteLine(folderName.GetType());
   //Console.WriteLine(f.GetType());
}

我尝试使用Convert.toDatetime（），我收到无法创建的错误转换方式我可以这么做吗？

I tried with Convert.toDatetime() and i get error that unable to made the converstion.How can i do so with this?

推荐答案

你应该使用 DateTime.TryParseExact 。

var newDate = DateTime.ParseExact("20111120", 
                                  "yyyyMMdd", 
                                   CultureInfo.InvariantCulture);

或

string str = "20111021";
string[] format = {"yyyyMMdd"};
DateTime date;

if (DateTime.TryParseExact(str, 
                           format, 
                           System.Globalization.CultureInfo.InvariantCulture,
                           System.Globalization.DateTimeStyles.None, 
                           out date))
{
     //valid
}

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