C# 如何在文本框中使用 \n
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How To Use \n In a TextBox
提问by Nathan Campos
I'm developing a program that I'm using a string(generatedCode) that contains some \nto enter a new-line at the textBox that I'm using it(textBox1.Text = generatedCode), but when I'm running the program, instead of breaking that line I'm seeing a square.
我正在开发一个程序，我正在使用一个字符串（generatedCode），其中包含一些\n在我使用它的文本框中输入一个新行（textBox1.Text = generatedCode），但是当我运行该程序时，而不是打破该行我看到一个正方形。
Remember that I've set the Multilinevalue of the textBox to True.
请记住，我已将MultilinetextBox的值设置为True.
采纳答案by Jon Skeet
Replace \n with \r\n - that's how Windows controls represent newlines (but see note at bottom):
用 \r\n 替换 \n - 这就是 Windows 控件表示换行符的方式（但请参阅底部的注释）：
textBox1.Text = generatedCode.Replace("\n", "\r\n");
or
或者
textBox1.Text = generatedCode.Replace("\n", Environment.NewLine);
Note: As discussed in comments, you maywant to use Environment.NewLine. It's unclear though - it's not well-defined what line separator Windows Forms controls should use when they're not running on Windows. Should they use the platform default, or the Windows one (as it's a port of a Windows GUI control)? One of the examples in MSDN doesuse Environment.NewLine, but I've seen horribly wrong examples in MSDN before now, and the documentation just doesn't state which is should be.
注意：如评论中所述，您可能希望使用Environment.NewLine. 但目前还不清楚 - 没有明确定义 Windows 窗体控件在不在 Windows 上运行时应使用的行分隔符。他们应该使用平台默认值还是 Windows 版本（因为它是 Windows GUI 控件的一个端口）？MSDN中的一个示例确实使用了Environment.NewLine，但我之前在 MSDN中看到过非常错误的示例，文档只是没有说明应该使用哪个示例。
In an ideal world, we'd just have one line separator - and even in a second best world, every situation would clearly define which line separator it was expecting...
在理想的世界中，我们只有一个行分隔符 - 即使在第二好的世界中，每种情况都会清楚地定义它所期望的行分隔符......
回答by Bob
Usually \r\ngets me a newline in a textbox. Try replacing your \nwith \r\njust be careful you don't have a mix of \r\nand \n
通常\r\n让我在文本框中换行。尝试替换你\n的\r\n只是小心你没有混合\r\n和\n
回答by MakoCSH
Add a carriage return (\r) and it should work:
添加回车（\ r），它应该可以工作：
TextBox1.Text = "First line\r\nSecond line";
回答by dancer42
since using \n is easier on the eyes (especailly when formatting), and also sometimes you don't control how the source string is constructed - I find best practice is to use:TextBox1.Text = str.Replace("\r\n", "\n").Replace("\n", Environment.NewLine);
因为使用 \n 更容易（尤其是在格式化时），而且有时您无法控制源字符串的构造方式 - 我发现最佳实践是使用：TextBox1.Text = str.Replace("\r\n", "\n").Replace("\n", Environment.NewLine);
