blocks|key|1025834|text|假设“公共语法”意味着您需要一个解决方案来给出两个输出，String.Format("${0:#.##}",+x)就能做到这一点。当x为1.00M时，结果将为"$1"。当x为1.22M时，结果为"$1.22"。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1025835|entityMap^0|S|T|1U|1|1W|5|27|4|2D|1|2F|5|2P|7|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]|$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|G|$]]

Assuming that 'common syntax' means that you need one solution to give both outputs, <code>String.Format("${0:#.##}", x)</code> does the trick. When <code>x</code> is <code>1.00M</code>, the result will be <code>"$1"</code>. when <code>x</code> is <code>1.22M</code>, the result is <code>"$1.22"</code>.

blocks|key|3013662|text|尝试这些-两者都将为当前系统输出适当的货币符号：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3013663|a.ToString("C2");++//+Outputs+2DP
b.ToString("C0");+//+Outputs+no+DP|code-block|syntax|javascript|3013664|如果需要提供特定的货币符号，请使用与上面相同的符号，但用N代替C。|3013665|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Try these - both will output the appropriate currency symbol for the current system:

<pre><code>a.ToString("C2"); // Outputs 2DP
b.ToString("C0"); // Outputs no DP
</code></pre>

If you need to supply a specific currency symbol, use the same as above, but substitute N for C.

blocks|key|1025787|text|Decimal类型旨在跟踪它有多少有效位数。这就是1.00M.ToString()返回字符串1.00的原因。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1025788|要打印不带派别部分的精度，可以使用格式说明符N和Decimal+0|1025789|1.22M.ToString("N0")+=>+"1"
1.00M.ToString("N0")+=>+"1"
1.77M.ToString("N0")+=>+"2"|code-block|syntax|javascript|1025790|这将在转换过程中舍入Decimal。|1025791|entityMap^0|0|7|P|G|1A|4|0|M|1|O|7|W|1|0|0|A|7|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|X|8|@$9|Y|A|Z|B|C]|$9|10|A|11|B|C]|$9|12|A|13|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|14|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|15|8|@$9|16|A|17|B|C]]|D|@]|E|$]]|$1|O|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|P|$]]

The <code>Decimal</code> type is designed to keep track of how many significant digits it has. That is why <code>1.00M.ToString()</code> returns the string <code>1.00</code>.

To print a <code>Decimal</code> without the factional part you can use the format specifier <code>N</code> with precision <code>0</code>:

<pre><code>1.22M.ToString("N0") =&gt; "1"
1.00M.ToString("N0") =&gt; "1"
1.77M.ToString("N0") =&gt; "2"
</code></pre>

This will round the <code>Decimal</code> in the conversion process.

blocks|key|3013723|text|在VB.NET中，我将使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3013724|+CINT(INT(a))|code-block|syntax|javascript|3013725|我假设存在一个C#变体。|3013726|我在这个链接上找到了一个可能的解决方案：|3013727|http://www.harding.edu/fmccown/vbnet_csharp_comparison.html|offset|length|3013728|进一步解释：|3013729|decimal+a+=+1.55M;
Console.WriteLine("$"+&+CInt(Int(a)).ToString());+//+result+is+$2

decimal+b+=+1.22M;
Console.WriteLine("$"+&+CInt(Int(b)).ToString());+//+result+is+$1|3013730|我会避免使用货币格式，因为小数是该类固有的。|3013731|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|0|1N|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|13|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|14|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|15|8|@]|9|@$M|16|N|17|1|18]]|A|$]]|$1|O|3|P|5|6|7|19|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|1A|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|1B|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|L]]]]

In VB.NET I would use 

<pre><code> CINT(INT(a))
</code></pre>

I imagine a C# variant exists.

I found a probable solution at this link:

<a href="http://www.harding.edu/fmccown/vbnet_csharp_comparison.html" rel="nofollow noreferrer">http://www.harding.edu/fmccown/vbnet_csharp_comparison.html</a>

To further explain:

<pre><code>decimal a = 1.55M;
Console.WriteLine("$" &amp; CInt(Int(a)).ToString()); // result is $2

decimal b = 1.22M;
Console.WriteLine("$" &amp; CInt(Int(b)).ToString()); // result is $1
</code></pre>

I would steer away from utilizing the currency format as the decimals are inherent to that class.

blocks|key|1769581|text|string.Format("${0:0}",b)|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1769582|在C#中，您可以使用{0}来告知参数，使用{0:format}来告知带有格式的参数。|unstyled|offset|length|style|CODE|1769583|编辑|BOLD|1769584|哦，我原以为OP要做的是去掉b的数字，但现在我意识到他想去掉无用的零。|1769585|string.Format("${0:#.##}",b)|1769586|entityMap^0|0|A|3|L|A|0|0|2|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|U|8|@$G|V|H|W|I|J]|$G|X|H|Y|I|J]]|9|@]|A|$]]|$1|K|3|L|5|F|7|Z|8|@$G|10|H|11|I|M]]|9|@]|A|$]]|$1|N|3|O|5|F|7|12|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|13|8|@]|9|@]|A|$B|C]]|$1|R|3|-4|5|F|7|14|8|@]|9|@]|A|$]]]|S|$]]

<pre><code>string.Format("${0:0}",b)
</code></pre>

In C# you can use <code>{0}</code> to tell a parameter, and <code>{0:format}</code> to tell a parameter with format.

EDIT

Oh I thought what OP want to do is removing the digits of b. But now I realized that he wants to remove useless zeroes.

<pre><code>string.Format("${0:#.##}",b)
</code></pre>

blocks|key|1025848|text|我认为这里还有其他问题。如果问题是完全忽略小数位，那么仅转换为整数将产生所需的输出，但显然会降低精度，这不是一件好事。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1025849|当格式化为字符串时，也有舍入注意事项，如下例所示。|1025850|decimal+a+=+1.55M;
Console.WriteLine(a.ToString("C0"));+//+result+is+$2

decimal+b+=+1.22M;
Console.WriteLine(+b.ToString(+"C0"+)+);+//+result+is+$1|code-block|syntax|javascript|1025851|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

There are other issues here I think. If the question is to completely ignore decimal places, then just casting to an integer would produce the required output, but would obviously loose precision, which is not a good thing. 

There are also rounding considerations when formatting as a string like example below.

<pre><code>decimal a = 1.55M;
Console.WriteLine(a.ToString("C0")); // result is $2

decimal b = 1.22M;
Console.WriteLine( b.ToString( "C0" ) ); // result is $1
</code></pre>

blocks|key|3013939|text|我假设这只是为了dispaly和，而不是为了当数字在decimal之后没有值时将数据类型更改为INT。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3013940|使用系统；|3013941|namespace+stackOverflow
{
++++class+Program
++++{
++++++++static+void+Main(string[]+args)
++++++++{
++++++++++++decimal+a+=+1.2245M;
++++++++++++decimal+b+=+1.00M;



++++++++++++Console.WriteLine("Your+percentage+to+date+is:+{0:#.#####}",+a);
++++++++++++Console.WriteLine("Your+percentage+to+date+is:+{0:#.#####}",+b);//#.####+gives+number+upto+4+decimal
++++++++++++Console.ReadLine();

++++++++}


++++}+

}|code-block|syntax|javascript|3013942|entityMap^0|G|Z|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|S|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

I presume that this is just for dispaly and not for changing data type to INT when number has no value after decimal.

using System;

<pre><code>namespace stackOverflow
{
 class Program
 {
 static void Main(string[] args)
 {
 decimal a = 1.2245M;
 decimal b = 1.00M;



 Console.WriteLine("Your percentage to date is: {0:#.#####}", a);
 Console.WriteLine("Your percentage to date is: {0:#.#####}", b);//#.#### gives number upto 4 decimal
 Console.ReadLine();

 }


 } 

}
</code></pre>

blocks|key|4423778|text|using+System;
using+System.Collections.Generic;
using+System.Linq;
using+System.Text;

namespace+ConsoleApplication1
{
++++class+Program
++++{

++++++++static+void+Main(string[]+args)
++++++++{
++++++++++++double+n,+x;
++++++++++++int+a,+dec+=+0;
++++++++++++Console.WriteLine("Enter+double");
++++++++++++n+=+Convert.ToDouble(Console.ReadLine());

++++++++++++a+=+Convert.ToInt32(n);
++++++++++++x+=+n+-+a;
++++++++++++if+(x+<+0)
++++++++++++++++a--;
++++++++++++int+k+=+1000;
++++++++++++for+(int+i+=+0;+i+<+n.ToString().Length;+i%2B%2B)
++++++++++++{
++++++++++++++++if+(n.ToString()[i]+==+'.')
++++++++++++++++++++k+=+i;
++++++++++++++++if+(i+>+k)
++++++++++++++++++++dec+=+dec+*+10+%2B+(n.ToString()[i]-48);
++++++++++++}

++++++++++++Console.WriteLine("Non-fraction+"+%2B+a);
++++++++++++Console.WriteLine("Fraction+"+%2B+dec);


++++++++++++Console.ReadKey();

++++++++}


++++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4423779|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
 class Program
 {

 static void Main(string[] args)
 {
 double n, x;
 int a, dec = 0;
 Console.WriteLine("Enter double");
 n = Convert.ToDouble(Console.ReadLine());

 a = Convert.ToInt32(n);
 x = n - a;
 if (x &lt; 0)
 a--;
 int k = 1000;
 for (int i = 0; i &lt; n.ToString().Length; i++)
 {
 if (n.ToString()[i] == '.')
 k = i;
 if (i &gt; k)
 dec = dec * 10 + (n.ToString()[i]-48);
 }

 Console.WriteLine("Non-fraction " + a);
 Console.WriteLine("Fraction " + dec);


 Console.ReadKey();

 }


 }
}
</code></pre>

How to take away fraction part while formatting decimal type in .NET? I need common syntax for both variants. Is there any gentle solution?

<pre><code> decimal a = 1.22M;
 decimal b = 1.00M;

 String.Format("${0}", a); // result is $1.22
 String.Format("${0}", b); // result is $1.00, should be $1, HOW?
</code></pre>

How to take away fraction part from decimal?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

教程

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云智能顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

EdgeOne AI 安全实战专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

聚焦“写作效率、视觉美观与运行性能”三方面进行全面升级，为您提供更高效、稳定的创作环境

社区富文本&Markdown编辑器全新改版上线，欢迎大家体验!

诚挚邀请您参与本次调研，分享您的真实使用感受与建议。您的反馈至关重要，感谢您的支持与参与！

社区新版编辑器体验调研

如何在.NET中格式化小数类型时去掉小数部分？我需要两种变体的通用语法。有什么温和的解决方案吗？            decimal a = 1.22M;            decimal b = 1.00M;            String.Format("${0}", a); // result is $1.22            String.Format("${0}", b)

问如何去掉小数的小数部分？
EN

回答 8

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何去掉小数的小数部分？EN

回答 8

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何去掉小数的小数部分？
EN