在 C# 中更改多行文本框的特定行 [英] Change Particular line of Multiline textbox in C#

问题描述

我无法更改多行文本框的特定字符串.

I am unable to Change the specific string of a multiline TextBox.

假设多行文本框的第一行是 "Hello" &第二行是 "Bye".但是当我尝试更改第二行的值时，如下所示.

suppose first line of multiline textbox is "Hello" & second line is "Bye".But when i trying to change the value of second line like below.

textBox1.Lines[1] = "再见";

当我使用调试模式看到结果时，它不是再见".

When I saw the result using Debug mode it was not "Good bye".

我也读过这个MSDN 文章&这个 stackoverflow 问题，但无法得到想要的回答.

I also read this MSDN article & this stackoverflow question but can't get the desired answer.

推荐答案

正如 MSDN 所述(您提供的链接):

As MSDN states (the link you provided):

默认情况下，行的集合是 TextBox 中行的只读副本.要获得可写的行集合，请使用代码类似于以下内容: textBox1.Lines = new string[] { "abcd" };

By default, the collection of lines is a read-only copy of the lines in the TextBox. To get a writable collection of lines, use code similar to the following: textBox1.Lines = new string[] { "abcd" };

因此，您必须取"Lines 集合，对其进行更改，然后返回到TextBox.可以这样实现:

So, you have to "take" Lines collection, change it, and then return to TextBox. That can be achieved like this:

var lines = TextBox1.Lines;
lines[1] = "GoodBye";
TextBox1.Lines = lines;

或者，您可以替换文本，例如Wolle 建议

Alternatively, you can replace text, like Wolle suggested

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