blocks|key|2226101|text|在不对代码进行任何修改的情况下，它将只需要最多256个字符，即；它将允许输入254个字符，并为CR和LF保留2个字符。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2226102|以下方法将有助于提高限制：|2226103|private+static+string+ReadLine()
++++{
++++++++Stream+inputStream+=+Console.OpenStandardInput(READLINE_BUFFER_SIZE);
++++++++byte[]+bytes+=+new+byte[READLINE_BUFFER_SIZE];
++++++++int+outputLength+=+inputStream.Read(bytes,+0,+READLINE_BUFFER_SIZE);
++++++++//Console.WriteLine(outputLength);
++++++++char[]+chars+=+Encoding.UTF7.GetChars(bytes,+0,+outputLength);
++++++++return+new+string(chars);
++++}|code-block|syntax|javascript|2226104|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|$]]

Without any modifications to the code it will only take a maximum of 256 characters ie; It will allow 254 to be entered and will reserve 2 for CR and LF.

The following method will help to increase the limit:

<pre><code>private static string ReadLine()
 {
 Stream inputStream = Console.OpenStandardInput(READLINE_BUFFER_SIZE);
 byte[] bytes = new byte[READLINE_BUFFER_SIZE];
 int outputLength = inputStream.Read(bytes, 0, READLINE_BUFFER_SIZE);
 //Console.WriteLine(outputLength);
 char[] chars = Encoding.UTF7.GetChars(bytes, 0, outputLength);
 return new string(chars);
 }
</code></pre>

blocks|key|1740423|text|Stack72的答案的一个问题是，如果在批处理脚本中使用代码，则输入不再是行缓冲的。我在averagecoder.net上找到了一个保留ReadLine调用的替代版本。注意，StreamReader还必须有一个长度参数，因为它也有一个固定的缓冲区。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1740424|byte[]+inputBuffer+=+new+byte[1024];+
Stream+inputStream+=+Console.OpenStandardInput(inputBuffer.Length);
Console.SetIn(new+StreamReader(inputStream,+Console.InputEncoding,+false,+inputBuffer.Length));
string+strInput+=+Console.ReadLine();|code-block|syntax|javascript|1740425|entityMap|0|LINK|mutability|MUTABLE|url|http://averagecoder.net/how-to-get-user-input-and-allowing-more-than-256-characters-to-be-entered-on-net-console-application.htm^0|18|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]]]]

An issue with stack72's answer is that if the code is used in a batch-script the input is no longer line buffered. I found an alternative version at <a href="http://averagecoder.net/how-to-get-user-input-and-allowing-more-than-256-characters-to-be-entered-on-net-console-application.htm">averagecoder.net</a> that keeps the ReadLine call. Note that StreamReader also must have a length argument, since it has a fixed buffer as well.

<pre><code>byte[] inputBuffer = new byte[1024]; 
Stream inputStream = Console.OpenStandardInput(inputBuffer.Length);
Console.SetIn(new StreamReader(inputStream, Console.InputEncoding, false, inputBuffer.Length));
string strInput = Console.ReadLine();
</code></pre>

blocks|key|1740444|text|这是ara's+answer的一个简化版本，它适用于我。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1740445|int+bufSize+=+1024;
Stream+inStream+=+Console.OpenStandardInput(bufSize);
Console.SetIn(new+StreamReader(inStream,+Console.InputEncoding,+false,+bufSize));

string+line+=+Console.ReadLine();|code-block|syntax|javascript|1740446|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/8048103/2399343^0|2|C|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]]]]

This is a simplified version of <a href="https://stackoverflow.com/a/8048103/2399343">ara's answer</a> and it works for me.

<pre><code>int bufSize = 1024;
Stream inStream = Console.OpenStandardInput(bufSize);
Console.SetIn(new StreamReader(inStream, Console.InputEncoding, false, bufSize));

string line = Console.ReadLine();
</code></pre>

blocks|key|3813033|text|这是Petr+Matas'+answer的简化版本。基本上，您只能指定一次缓冲区大小，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3813034|Console.SetIn(new+StreamReader(Console.OpenStandardInput(),
+++++++++++++++++++++++++++++++Console.InputEncoding,
+++++++++++++++++++++++++++++++false,
+++++++++++++++++++++++++++++++bufferSize:+1024));
string+line+=+Console.ReadLine();|code-block|syntax|javascript|3813035|因为到最后|3813036|Console.OpenStandardInput(int+bufferSize)|3813037|呼叫|3813038|private+static+Stream+GetStandardFile(int+stdHandleName,+FileAccess+access,+int+bufferSize)|3813039|它不使用bufferSize！|3813040|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/18203115/189011|1|http://referencesource.microsoft.com/#mscorlib/system/console.cs^0|2|I|0|0|0|0|0|0|0|4|A|1|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|F|7|16|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|17|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|18|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|19|8|@]|9|@]|C|$]]|$1|O|3|P|5|F|7|1A|8|@]|9|@]|C|$G|H]]|$1|Q|3|R|5|6|7|1B|8|@]|9|@$A|1C|B|1D|1|1E]]|C|$]]|$1|S|3|-4|5|6|7|1F|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]|10|$5|V|W|X|C|$Y|11]]]]

This is a simplified version of <a href="https://stackoverflow.com/a/18203115/189011" title="Petr Matas&#39; answer">Petr Matas' answer</a>.
Basically you can specify the buffer size only once as follow :

<pre><code>Console.SetIn(new StreamReader(Console.OpenStandardInput(),
 Console.InputEncoding,
 false,
 bufferSize: 1024));
string line = Console.ReadLine();
</code></pre>

Because in the end

<pre><code>Console.OpenStandardInput(int bufferSize)
</code></pre>

calls

<pre><code>private static Stream GetStandardFile(int stdHandleName, FileAccess access, int bufferSize)
</code></pre>

which doesn't use <a href="http://referencesource.microsoft.com/#mscorlib/system/console.cs" rel="noreferrer">bufferSize</a> !

blocks|key|2220602|text|Console.ReadLine()不能超过254个字符。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2220603|我找到了下面的代码here的单个行。这似乎起到了作用。|BOLD|2220604|2220605|+Console.SetIn(新StreamReader(Console.OpenStandardInput(8192)));|blockquote|2220606|2220607|entityMap|0|LINK|mutability|MUTABLE|url|https://social.msdn.microsoft.com/Forums/vstudio/en-US/51ad87c5-92a3-4bb3-8385-bf66a48d6953/how-to-read-more-than-254-characters-from-the-console?forum=csharpgeneral^0|0|I|0|7|9|9|4|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Y|8|@$9|Z|A|10|B|H]]|D|@$9|11|A|12|1|13]]|E|$]]|$1|I|3|-4|5|6|7|14|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|15|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|16|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|O|$P|$5|Q|R|S|E|$T|U]]]]

<code>Console.ReadLine()</code> has a 254 character limit.

I found the below single line of code <a href="https://social.msdn.microsoft.com/Forums/vstudio/en-US/51ad87c5-92a3-4bb3-8385-bf66a48d6953/how-to-read-more-than-254-characters-from-the-console?forum=csharpgeneral" rel="noreferrer">here</a>. That seemed to do the trick.

<blockquote>
 Console.SetIn(new StreamReader(Console.OpenStandardInput(8192)));
</blockquote>

blocks|key|2220525|text|ReadLine()在内部逐个字符读取，直到遇到-1、'\n‘或'\r\n’为止。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2220526|++++public+virtual+String+ReadLine()
++++{+
++++++++StringBuilder+sb+=+new+StringBuilder();
++++++++while+(true)+{+
++++++++++++int+ch+=+Read();+
++++++++++++if+(ch+==+-1)+break;
++++++++++++if+(ch+==+'\r'+%7C%7C+ch+==+'\n')+
++++++++++++{
++++++++++++++++if+(ch+==+'\r'+&&+Peek()+==+'\n')+Read();
++++++++++++++++return+sb.ToString();
++++++++++++}+
++++++++++++sb.Append((char)ch);
++++++++}+
++++++++if+(sb.Length+>+0)+return+sb.ToString();+
++++++++return+null;
++++}+|code-block|syntax|javascript|2220527|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|$]]

ReadLine() internally reads character by character until a -1 or '\n' or '\r\n' is encountered.

<pre><code> public virtual String ReadLine()
 { 
 StringBuilder sb = new StringBuilder();
 while (true) { 
 int ch = Read(); 
 if (ch == -1) break;
 if (ch == '\r' || ch == '\n') 
 {
 if (ch == '\r' &amp;&amp; Peek() == '\n') Read();
 return sb.ToString();
 } 
 sb.Append((char)ch);
 } 
 if (sb.Length &gt; 0) return sb.ToString(); 
 return null;
 } 
</code></pre>

blocks|key|122234|text|这似乎是Windows控制台的一个限制。您应该尝试将输入放到一个文件中，然后将该文件通过管道传输到应用程序。我不确定这是否会奏效，但它有机会。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|122235|regex_text.exe+<+my_test_data.txt|code-block|syntax|javascript|122236|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|$]]

This appears to be a limitation of the Windows console. You should try putting your input into a file, and then piping the file into the application. I am not certain if that will work, but it has a chance.

<pre><code>regex_text.exe &lt; my_test_data.txt
</code></pre>

blocks|key|1740390|text|根据您的操作系统，对于XP，命令行输入仅接受8191个字符，对于NT和Windows+2000，命令行输入仅接受2047个字符。我建议您传递一个文件名，它包含您的长输入并读取该文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1740391|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Depending on your OS, the command line input will only accept 8191 characters for XP and 2047 characters for NT and Windows 2000. I suggest you pass a filename instead which has your long input and read that file.

blocks|key|1740474|text|如果要在控制台中查看文本的整个输出，我发现以下代码可以显示它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1740475|Console.SetBufferSize(128,+1024);|code-block|syntax|javascript|1740476|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|$]]

If it is a matter of seeing the entire output of the text in the Console, I have found that the following code works to display it:

<pre><code>Console.SetBufferSize(128, 1024);
</code></pre>

blocks|key|122380|text|将输入保存为文本并使用StreamReader。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|122381|using+System;

using+System.IO;

static+void+Main(string[]+args)
{

++++try
++++{
++++++++StreamReader+sr+=+new+StreamReader("C:\\Test\\temp.txt");
++++++++Console.WriteLine(sr.ReadLine().Length);
++++}
++++catch+(Exception+e)
++++{
+++++++++Console.WriteLine(e.StackTrace);
++++}
}|code-block|syntax|javascript|122382|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|$]]

Save the input into text and use StreamReader.

<pre><code>using System;

using System.IO;

static void Main(string[] args)
{

 try
 {
 StreamReader sr = new StreamReader("C:\\Test\\temp.txt");
 Console.WriteLine(sr.ReadLine().Length);
 }
 catch (Exception e)
 {
 Console.WriteLine(e.StackTrace);
 }
}
</code></pre>

When running a small piece of C# code, when I try to input a long string into <code>Console.ReadLine()</code> it seems to cut off after a couple of lines.

Is there a max length to Console.Readline(), if so is there a way to increase that?
<img src="https://i.stack.imgur.com/UxPOp.png" alt="enter image description here">

Console.ReadLine() max length?

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。

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当运行一小段C#代码时，当我试图在Console.ReadLine()中输入一个长字符串时，它似乎在几行之后就被切断了。Console.Readline()有最大长度限制吗?如果有，有没有办法增加长度？​

问Console.ReadLine()最大长度？
EN

回答 10

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问Console.ReadLine()最大长度？
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