将 mm/dd/yyyy 转换为 yyyymmdd (VB.NET)
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Convert mm/dd/yyyy to yyyymmdd (VB.NET)
提问by l3_08
Is there any way I can convert a date of format: dd/mm/yyyy to yyyymmdd format? For example from : 25/07/2011 to 20110725? in VB.NET?
有什么方法可以将日期格式转换为：dd/mm/yyyy 到 yyyymmdd 格式？例如从：25/07/2011 到 20110725？在 VB.NET 中？
回答by Jon Skeet
Dates themselves don't haveformats inherently. You can parse a string into a DateTimeby parsing it with dd/MM/yyyyformat and then convert that into a string using yyyyMMddformat:
日期本身不具有格式固有的。您可以DateTime通过使用dd/MM/yyyyformat解析字符串将其解析为 a ，然后使用yyyyMMddformat将其转换为字符串：
DateTime date = DateTime.ParseExact(text, "dd/MM/yyyy",
CultureInfo.InvariantCulture);
string reformatted = date.ToString("yyyyMMdd", CultureInfo.InvariantCulture);
Or in VB:
或者在VB中：
Dim date as DateTime = DateTime.ParseExact(text, "dd/MM/yyyy", CultureInfo.InvariantCulture)
Dim reformatted as String = date.ToString("yyyyMMdd", CultureInfo.InvariantCulture)
(And make sure you have an import for System.Globalization.)
（并确保您有 . 的导入System.Globalization。）
However, ideally you should keep it as a DateTime(or similar) for as long as possible.
但是，理想情况下，您应该DateTime尽可能长时间地将其作为（或类似的）保存。
回答by Ritz Arlekar
CDate(Datetext).ToString("yyyyMMdd")
回答by Vincent Van Den Berghe
Use the DateTime.ParseExactmethod to parse the date, then use DateTimeObj.ToString("yyyyMMdd").
使用DateTime.ParseExact方法解析日期，然后使用DateTimeObj.ToString("yyyyMMdd").
