vb.net VB中个位数日前加零
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Add zero in front of single digit day in VB
提问by Bladefreak
I have the following codes in visual basic that display the day/month/year
我在visual basic中有以下代码显示日/月/年
CStr(vDay) & "/" & (vMonth) & "/" & (vYear) & " " & (vHour) & ":" & (vMinute) & ":" & (vSecond), DateTime.Now
How can I add a "0" in front of a single digit day and month?
如何在一位数的日期和月份前添加“0”？
回答by Steven Doggart
If your variables are integers, you can use the "D" format specifier to set how many digits you want, for instance:
如果您的变量是整数，您可以使用“D”格式说明符来设置您想要的位数，例如：
vMonth.ToString("D2")
However, if you already have the value in a Dateobject, then you can just use it's built-in formatting, which would be easier:
但是，如果您已经在Date对象中拥有值，那么您可以使用它的内置格式，这会更容易：
DateTime.Now.ToString("dd/MM/yyyy HH:mm:ss")
回答by programmergirl90
To account for all situations, PadLeft is most helpful. The first part is set total width for the integer, the second part is the character to be placed there.
考虑到所有情况，PadLeft 最有帮助。第一部分设置整数的总宽度，第二部分是要放置在那里的字符。
vMonth.ToString().PadLeft(2, "0"c)
This would place a zero in front of single digit months.
这将在个位数月份前放置一个零。
