在 .Net 中用零开始填充数字
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/489466/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Pad a number with starting zero in .Net
提问by Alex
I have a requirement to pad all single digits numbers with a starting zero. Can some one please suggest the best method? (ex 1 -> 01, 2 -> 02, etc)
我需要用起始零填充所有个位数。有人可以建议最好的方法吗？（例如 1 -> 01、2 -> 02 等）
回答by Rockcoder
number.ToString().PadLeft(2, '0')
回答by bdukes
I'd call .ToStringon the numbers, providing a format stringwhich requires two digits, as below:
我会在数字上调用.ToString，提供一个需要两位数字的格式字符串，如下所示：
int number = 1;
string paddedNumber = number.ToString("00");
If it's part of a larger string, you can use the format string within a placeholder:
如果它是较大字符串的一部分，则可以在占位符中使用格式字符串：
string result = string.Format("{0:00} minutes remaining", number);
回答by MrTelly
Assuming you're just outputing these values, not storing them
假设您只是输出这些值，而不是存储它们
int number = 1;
Console.Writeline("{0:00}", number);
Here's a useful resourcefor all formats supported by .Net.
这是.Net 支持的所有格式的有用资源。
回答by Taylor Brown
I'm gonna add this option as an answer since I don't see it here and it can be useful as an alternative.
我将添加此选项作为答案，因为我在这里没有看到它，它可以用作替代方法。
In VB.NET:
在 VB.NET 中：
''2 zeroes left pad
Dim num As Integer = 1
Dim numStr2ch As String = Strings.Right("00" & num.ToString(), 2)
''4 zeroes left pad
Dim numStr4ch As String = Strings.Right("0000" & num.ToString(), 4)
''6 zeroes left pad
Dim numStr6ch As String = Strings.Right("000000" & num.ToString(), 6)
回答by doer
# In PowerShell:
$year = 2013
$month = 5
$day = 8
[string] $datestamp = [string]::Format("{0:d4}{1:d2}{2:d2}", $year, $month, $day)
Write-Host "Hurray, hurray, it's $datestamp!"
