我想知道在.NET中是否存在我缺少的方法或格式字符串来转换以下内容:
1 to 1st
2 to 2nd
3 to 3rd
4 to 4th
11 to 11th
101 to 101st
111 to 111th
This link有一个很好的例子,说明了编写自己的函数所涉及的基本原理,但是如果我缺少内置容量,我会更好奇。
解决方案
斯科特汉塞尔曼的回答是被接受的,因为它直接回答了这个问题。
但是,有关解决方案,请参阅this great answer。
答案 0 :(得分:83)
这是一个比你想象的要简单得多的功能。虽然可能已经存在.NET函数,但是以下函数(用PHP编写)可以完成这项工作。移植它不应该太难。
function ordinal($num) {
$ones = $num % 10;
$tens = floor($num / 10) % 10;
if ($tens == 1) {
$suff = "th";
} else {
switch ($ones) {
case 1 : $suff = "st"; break;
case 2 : $suff = "nd"; break;
case 3 : $suff = "rd"; break;
default : $suff = "th";
}
}
return $num . $suff;
}
答案 1 :(得分:55)
不,.NET基类库中没有内置功能。</ p>
答案 2 :(得分:55)
@nickf:这是C#中的PHP函数:
public static string Ordinal(int number)
{
string suffix = String.Empty;
int ones = number % 10;
int tens = (int)Math.Floor(number / 10M) % 10;
if (tens == 1)
{
suffix = "th";
}
else
{
switch (ones)
{
case 1:
suffix = "st";
break;
case 2:
suffix = "nd";
break;
case 3:
suffix = "rd";
break;
default:
suffix = "th";
break;
}
}
return String.Format("{0}{1}", number, suffix);
}
答案 3 :(得分:55)
简单,干净,快速
private static string GetOrdinalSuffix(int num)
{
if (num.ToString().EndsWith("11")) return "th";
if (num.ToString().EndsWith("12")) return "th";
if (num.ToString().EndsWith("13")) return "th";
if (num.ToString().EndsWith("1")) return "st";
if (num.ToString().EndsWith("2")) return "nd";
if (num.ToString().EndsWith("3")) return "rd";
return "th";
}
或者更好,作为一种扩展方法
public static class IntegerExtensions
{
public static string DisplayWithSuffix(this int num)
{
if (num.ToString().EndsWith("11")) return num.ToString() + "th";
if (num.ToString().EndsWith("12")) return num.ToString() + "th";
if (num.ToString().EndsWith("13")) return num.ToString() + "th";
if (num.ToString().EndsWith("1")) return num.ToString() + "st";
if (num.ToString().EndsWith("2")) return num.ToString() + "nd";
if (num.ToString().EndsWith("3")) return num.ToString() + "rd";
return num.ToString() + "th";
}
}
现在你可以打电话
int a = 1;
a.DisplayWithSuffix();
或甚至与
一样直接1.DisplayWithSuffix();
答案 4 :(得分:12)
这已经被覆盖但我不确定如何链接到它。这是代码snippit:
public static string Ordinal(this int number)
{
var ones = number % 10;
var tens = Math.Floor (number / 10f) % 10;
if (tens == 1)
{
return number + "th";
}
switch (ones)
{
case 1: return number + "st";
case 2: return number + "nd";
case 3: return number + "rd";
default: return number + "th";
}
}
仅供参考:这是一种扩展方法。如果您的.NET版本低于3.5,请删除此关键字
[编辑]:感谢您指出它不正确,这就是您获取复制/粘贴代码所得到的:)
答案 5 :(得分:8)
这是Microsoft SQL Server功能版:
CREATE FUNCTION [Internal].[GetNumberAsOrdinalString]
(
@num int
)
RETURNS nvarchar(max)
AS
BEGIN
DECLARE @Suffix nvarchar(2);
DECLARE @Ones int;
DECLARE @Tens int;
SET @Ones = @num % 10;
SET @Tens = FLOOR(@num / 10) % 10;
IF @Tens = 1
BEGIN
SET @Suffix = 'th';
END
ELSE
BEGIN
SET @Suffix =
CASE @Ones
WHEN 1 THEN 'st'
WHEN 2 THEN 'nd'
WHEN 3 THEN 'rd'
ELSE 'th'
END
END
RETURN CONVERT(nvarchar(max), @num) + @Suffix;
END
答案 6 :(得分:2)
我知道这不是OP问题的答案,但是因为我发现从这个线程中解除SQL Server函数很有用,这里有一个Delphi(Pascal)等价物:
function OrdinalNumberSuffix(const ANumber: integer): string;
begin
Result := IntToStr(ANumber);
if(((Abs(ANumber) div 10) mod 10) = 1) then // Tens = 1
Result := Result + 'th'
else
case(Abs(ANumber) mod 10) of
1: Result := Result + 'st';
2: Result := Result + 'nd';
3: Result := Result + 'rd';
else
Result := Result + 'th';
end;
end;
......,-1st,0th有意义吗?
答案 7 :(得分:0)
另一种味道:
/// <summary>
/// Extension methods for numbers
/// </summary>
public static class NumericExtensions
{
/// <summary>
/// Adds the ordinal indicator to an integer
/// </summary>
/// <param name="number">The number</param>
/// <returns>The formatted number</returns>
public static string ToOrdinalString(this int number)
{
// Numbers in the teens always end with "th"
if((number % 100 > 10 && number % 100 < 20))
return number + "th";
else
{
// Check remainder
switch(number % 10)
{
case 1:
return number + "st";
case 2:
return number + "nd";
case 3:
return number + "rd";
default:
return number + "th";
}
}
}
}
答案 8 :(得分:0)
public static string OrdinalSuffix(int ordinal)
{
//Because negatives won't work with modular division as expected:
var abs = Math.Abs(ordinal);
var lastdigit = abs % 10;
return
//Catch 60% of cases (to infinity) in the first conditional:
lastdigit > 3 || lastdigit == 0 || (abs % 100) - lastdigit == 10 ? "th"
: lastdigit == 1 ? "st"
: lastdigit == 2 ? "nd"
: "rd";
}
答案 9 :(得分:-3)
else if (choice=='q')
{
qtr++;
switch (qtr)
{
case(2): strcpy(qtrs,"nd");break;
case(3):
{
strcpy(qtrs,"rd");
cout<<"End of First Half!!!";
cout<<" hteam "<<"["<<hteam<<"] "<<hs;
cout<<" vteam "<<" ["<<vteam;
cout<<"] ";
cout<<vs;dwn=1;yd=10;
if (beginp=='H') team='V';
else team='H';
break;
}
case(4): strcpy(qtrs,"th");break;
答案 10 :(得分:-6)
我认为序数后缀很难得到......你基本上必须编写一个使用开关来测试数字并添加后缀的函数。
没有理由在内部提供这种语言,特别是当它的语言环境特定时。
当涉及到要编写的代码量时,您可以比该链接做得更好,但是您必须为此编写函数...