更改文本框前一行文本的颜色 [英] Change text box fore color of one line of text

问题描述

有没有办法可以让一行文字说红色和其他绿色？

Is there a way I can make one line of text say red and other green?

if (Process.GetProcessesByName("RobloxPlayerBeta").Length > 0)
   {
       System.Threading.Thread.Sleep(4000);
       textBox2.Text += "\r\nWelcome to AL7!";
       textBox2.Update();
       textBox2.Text += "\r\nLoading Lua environment.";
       textBox2.Update();
       textBox2.Text += "\r\nERROR: Lua state failed.";
       textBox2.Update();

我尝试过：

What I have tried:

if (Process.GetProcessesByName("RobloxPlayerBeta").Length > 0)
   {
       System.Threading.Thread.Sleep(4000);
       textBox2.Text += "\r\nWelcome to AL7!";
       textBox2.Update();
       textBox2.Text += "\r\nLoading Lua environment.";
       textBox2.Update();
       textBox2.Text += "\r\nERROR: Lua state failed.";
       textBox2.Update();

推荐答案

嗨会员12896541，



字面上你想要的是TextBox无法实现的。如果您确实需要该颜色机制，则需要使用富文本框。答案已经在这里给出： c＃ - 每行的RichTextBox不同的背景颜色 - Stack溢出 [ ^ ]



RichTextBox控件具有 Lines 枚举器，可以对其进行操作以获取每个引用在框中排队。然后，您需要使用 GetFirstCharIndexFromLine 和行长度属性选择整行。最后，您需要一种机制来为每个奇数和偶数行设置颜色;你可以使用模数运算符。

Hi Member 12896541,

Literally what you want is not achievable by TextBox. If you really need that color mechanism, you need to use a rich text box. The answer is already given here: c# - RichTextBox different back color for each line - Stack Overflow[^]

A RichTextBox control has Lines enumerator that can be manipulated to get a reference to each line in the box. Then you need to select the entire line using the GetFirstCharIndexFromLine and the line length property. Finally you need a mechanism to set color for every odd and even line; you can use a modulus operator.

int LineCount = 0;
foreach (string line in richTextBox1.Lines)
{
    richTextBox1.Select(richTextBox1.GetFirstCharIndexFromLine(LineCount), line.Length);
    richTextBox1.SelectionColor = (LineCount++ % 2 == 0) ? Color.Red : Color.Green;
}

请在此查看：



RichTextBox.SelectionColor属性（System.Windows.Forms） [ ^ ]



另请查看Philippe提到的5分。这些是很好的建议;所以请相应地更改代码。

Please check here as a reference:

RichTextBox.SelectionColor Property (System.Windows.Forms)[^]

Also check the 5 points mentioned by Philippe. These are good suggestions; so please change the code accordingly.

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