blocks|key|683539|text|您可以使用String.Substring方法；例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|683540|string+s+=+"Lots+and+lots+of+characters";
string+firstTen+=+s.Substring(0,+10);|code-block|syntax|javascript|683541|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-us/dotnet/api/system.string.substring^0|5|G|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

You can use the <a href="https://docs.microsoft.com/en-us/dotnet/api/system.string.substring" rel="nofollow noreferrer">String.Substring</a> method; e.g.:
<pre><code>string s = &quot;Lots and lots of characters&quot;;
string firstTen = s.Substring(0, 10);
</code></pre>

blocks|key|900083|text|一个快速的一行程序，其中变量s是您的字符串：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|900084|public+string+GetFirstTenCharacters(string+s)
{
++++//+This+says+"If+string+s+is+less+than+10+characters,+return+s.
++++//+Otherwise,+return+the+first+10+characters+of+s."
++++return+(s.Length+<+10)+?+s+:+s.Substring(0,+10);
}|code-block|syntax|javascript|900085|然后像这样调用这个方法：|900086|string+result+=+this.GetFirstTenCharacters("Hello,+this+is+a+string!");|900087|entityMap^0|E|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

A quick, one-liner where the variable <code>s</code> is your string:

<pre><code>public string GetFirstTenCharacters(string s)
{
 // This says "If string s is less than 10 characters, return s.
 // Otherwise, return the first 10 characters of s."
 return (s.Length &lt; 10) ? s : s.Substring(0, 10);
}
</code></pre>

And just call this method like this: 

<pre><code>string result = this.GetFirstTenCharacters("Hello, this is a string!");
</code></pre>

blocks|key|900163|text|取决于:-)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|900164|通常情况下，您可能正在寻找SubString...但是如果你正在用unicode做一些花哨的事情，这将说明哪里会出问题(例如unicode+ranges+>+0xFFFF)：|900165|static+void+Main(string[]+arg)
{
++++string+ch+=+"(\xd808\xdd00汉语+or+漢語,+Hànyǔ)";

++++Console.WriteLine(ch.Substring(0,+Math.Min(ch.Length,+10)));

++++var+enc+=+Encoding.UTF32.GetBytes(ch);
++++string+first10chars+=+Encoding.UTF32.GetString(enc,+0,+Math.Min(enc.Length,+4+*+10));
++++Console.WriteLine(first10chars);

++++Console.ReadLine();
}|code-block|syntax|javascript|900166|出错的原因是因为字符是16位的，长度检查是UTF-16字符，而不是unicode字符。也就是说，这可能不是您的方案。|900167|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Depends :-)

Normally you are probably looking for SubString... but if you're doing fancy stuff with unicode, this demonstrates where that will go wrong (e.g. unicode ranges > 0xFFFF):

<pre><code>static void Main(string[] arg)
{
 string ch = "(\xd808\xdd00汉语 or 漢語, Hànyǔ)";

 Console.WriteLine(ch.Substring(0, Math.Min(ch.Length, 10)));

 var enc = Encoding.UTF32.GetBytes(ch);
 string first10chars = Encoding.UTF32.GetString(enc, 0, Math.Min(enc.Length, 4 * 10));
 Console.WriteLine(first10chars);

 Console.ReadLine();
}
</code></pre>

The reason that goes wrong is because chars are 16-bit and Length checks UTF-16 chars and not unicode characters. That said, that's probably not your scenario.

blocks|key|900236|text|您可以创建一个扩展方法，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|900237|public+static+class+Extension
{
++++public+static+string+Left(this+String+input,+int+length)
++++{
++++++++return+(input.Length+<+length)+?+input+:+input.Substring(0,+length);
++++}
}|code-block|syntax|javascript|900238|然后这样叫它：|900239|string+something+=+"I+am+a+string...+truncate+me!";
something.Left(10);|900240|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You could create an extension method, like this:

<pre><code>public static class Extension
{
 public static string Left(this String input, int length)
 {
 return (input.Length &lt; length) ? input : input.Substring(0, length);
 }
}
</code></pre>

and then call it like this:

<pre><code>string something = "I am a string... truncate me!";
something.Left(10);
</code></pre>

blocks|key|683778|text|字符串长度小于10也不例外|type|unstyled|depth|inlineStyleRanges|entityRanges|data|683779|String+s+=+"characters";
String+firstTen+=+s.Substring(0,+(s.Length+<+10)+?+s.Length+:+10);|code-block|syntax|javascript|683780|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

there will be no exception even if string lengeth is &lt;10

<pre><code>String s = "characters";
String firstTen = s.Substring(0, (s.Length &lt; 10) ? s.Length : 10);
</code></pre>

blocks|key|683800|text|有很多选项，比如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|683801|string+original+=+"A+string+that+will+only+contain+10+characters";
//first+option
string+test+=+original.Substring(0,+10);
//second+option
string+AnotherTest+=+original.Remove(10);
//third+option
string+SomeOtherTest+=+string.Concat(original.Take(10));|code-block|syntax|javascript|683802|希望这能帮上忙。|683803|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|$]]

Lots of options like:

<pre><code>string original = "A string that will only contain 10 characters";
//first option
string test = original.Substring(0, 10);
//second option
string AnotherTest = original.Remove(10);
//third option
string SomeOtherTest = string.Concat(original.Take(10));
</code></pre>

Hope it helps out.

blocks|key|900360|text|这取决于你对性格的定义。C#字符类型是WORD+(或ushort+-+min值:0，最大值:+65535+(2%5E16))。不同文本规范化可能产生不同的结果，例如:+NFC可能将字符表示为1个字符，而NFD将相同的字符表示为2。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|900361|如果您只使用7位ASCII码，则使用String.Substring应该可以工作。由于代理项对和组合字符，文本规范化将在8位/扩展ASCII、UTF-8+~+32中发挥作用。|900362|如果你想获取前10个字符(不是字符)，你应该使用：|900363|public+static+string+TakeCharacters(string+input,+int+index,+int+count)
{
++++if+(input+==+null)+return+null;
++++if+(index+>=+input.Length)
++++++++throw+new+ArgumentOutOfRangeException(
++++++++++++"index",
++++++++++++string.Format("index+{0}+is+out+of+range+(max+{1})",+index,+input.Length+-+1));
++++if+(count+<=+0)
++++++++throw+new+ArgumentException("length+should+be+greater+than+zero",+"count");

++++var+builder+=+new+StringBuilder();
++++while+(index+<+input.Length+&&+count+>+0)
++++{
++++++++var+c+=+StringInfo.GetNextTextElement(input,+index);
++++++++builder.Append(c);
++++++++index+%2B=+c.Length;
++++++++count--;
++++}
++++return+builder.ToString();
}|code-block|syntax|javascript|900364|请注意，StringInfo组合了字符/对，而GetNextTextElement返回了一个字符串。index和count参数是通过值传递的，因此可以在方法内部使用，而不会产生别名。|900365|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/cc230402.aspx^0|J|4|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|11|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|12|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

It depends on what you mean by character. The C# char type is a <a href="http://msdn.microsoft.com/en-us/library/cc230402.aspx" rel="nofollow">WORD</a> (or a ushort - min value: 0 and max value: 65535 (2^16)). Different text normalization might yield different results, example: NFC might represent a character as 1 char while NFD would represent that same character as 2.

Using String.Substring should work if you're only using 7-bit ASCII. Text normalization will play a role in 8-bit/extended ASCII, UTF-8 ~ 32 due to surrogate pairs and combining characters.

If you want to grab the first 10 characters (not char's), you should use:

<pre><code>public static string TakeCharacters(string input, int index, int count)
{
 if (input == null) return null;
 if (index &gt;= input.Length)
 throw new ArgumentOutOfRangeException(
 "index",
 string.Format("index {0} is out of range (max {1})", index, input.Length - 1));
 if (count &lt;= 0)
 throw new ArgumentException("length should be greater than zero", "count");

 var builder = new StringBuilder();
 while (index &lt; input.Length &amp;&amp; count &gt; 0)
 {
 var c = StringInfo.GetNextTextElement(input, index);
 builder.Append(c);
 index += c.Length;
 count--;
 }
 return builder.ToString();
}
</code></pre>

Note that StringInfo combines characters/pairs and GetNextTextElement returns a string. The index and count parameters are passed by value and thus can be used inside the method without aliasing.

blocks|key|683851|text|string+longStr+=+"A+lot+of+characters";
string+shortStr+=+new+string(longStr.Take(10).ToArray());|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|683852|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>string longStr = "A lot of characters";
string shortStr = new string(longStr.Take(10).ToArray());
</code></pre>

I have a string and I need to get just the first ten characters. Is there a way that I can do this easily. 

I hope someone can show me.

How can I get just the first ten characters of a string in C#

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

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

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

我有一个字符串，我只需要获取前十个字符。有没有什么方法可以让我轻松做到这一点。我希望有人能展示给我看。

问如何在C#中仅获取字符串的前十个字符
EN

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

问如何在C#中仅获取字符串的前十个字符EN

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

问如何在C#中仅获取字符串的前十个字符
EN