多行上的richTextBox SelectionBackColor [英] richTextBox SelectionBackColor on multiple lines

问题描述

我正在尝试使用红色前景色（SelectionColor）构建黄色BG颜色的垂直线参考。



我目前只有两行文字我的richTextBox。



但只有第一行颜色正确。第二行没有颜色。如何在每行20号的每个字符上着色（因此它显示一条垂直的红线）。



感谢您的帮助...

 richTextBoxColumns.Text =   1 2 3 4 5 \\ n; 
 richTextBoxColumns.Text + =   12345678901234567890123456789012345678901234567890; 
  foreach （ var  line  in  richTextBoxColumns.Lines）
 {
 richTextBoxColumns.Select（ 19 ， 1 ） ; 
 richTextBoxColumns.SelectionBackColor = Color.Yellow; 
 richTextBoxColumns.SelectionColor = Color.Red; 
} 

解决方案

试试看，你会知道原因：

 richTextBoxColumns.Text =   1 2 3 4 5\\\\ N; 
 richTextBoxColumns.Text + =   12345678901234567890123456789012345678901234567890; 
 
 richTextBoxColumns.Select（ 19 ， 1 ）; 
 richTextBoxColumns.SelectionBackColor = Color.Yellow; 
 richTextBoxColumns.SelectionColor = Color.Red; 
 
  int  line1Length = richTextBoxColumns.Lines [ 0 ]。长度; 
 richTextBoxColumns.Select（line1Length +  19 ， 1 ）; 
 richTextBoxColumns.SelectionBackColor = Color.Yellow; 
 richTextBoxColumns.SelectionColor = Color.Red; 

On

 richTextBoxColumns。选择（line1Length +  19 ， 1 ）; 

只需按照您的意愿更改+ 19部分。



调试此代码，你会发现，你的字体长度有问题：）

这是一种方法。

 < span class =code-keyword> int  markIndex =  0 ; 
  int  startIndex =  0 ; 
  do  
 {
 markIndex = startIndex +  19 ; 
 richTextBoxColumns.Select（markIndex， 1 ）; 
 richTextBoxColumns.SelectionBackColor = Color.Yellow; 
 richTextBoxColumns.SelectionColor = Color.Red; 
 startIndex = richTextBoxColumns.Text.IndexOf（'  \ n'，startIndex +  1 ）; 
}  while （startIndex >  =  0 ）; 
 richTextBoxColumns.SelectedText =  ; 

你将遇到的问题是你需要使用字符间距相等的字体，例如 Courier New ，否则你的垂直线将小于笔直。

白色空间似乎仍然是一个问题。



其他任何有解决方案的人是什么？

I'm trying to build a vertical line reference of yellow BG color with red foreground color (SelectionColor).

I currently only have two lines of text in my richTextBox.

But only the first line colors correctly. There is no color in the second line. How can I color each char at col 20 in each line (so it shows a vertical red line).

Thank you for any help...

richTextBoxColumns.Text  = "         1         2         3         4         5\r\n";
richTextBoxColumns.Text += "12345678901234567890123456789012345678901234567890";
foreach (var line in richTextBoxColumns.Lines)
{
  richTextBoxColumns.Select(19,1);
  richTextBoxColumns.SelectionBackColor = Color.Yellow;
  richTextBoxColumns.SelectionColor = Color.Red;
}

解决方案

Try that, you will know why :

richTextBoxColumns.Text = "         1         2         3         4         5\r\n";
richTextBoxColumns.Text += "12345678901234567890123456789012345678901234567890";
            
richTextBoxColumns.Select(19, 1);
richTextBoxColumns.SelectionBackColor = Color.Yellow;
richTextBoxColumns.SelectionColor = Color.Red;

int line1Length = richTextBoxColumns.Lines[0].Length;
richTextBoxColumns.Select(line1Length + 19, 1);
richTextBoxColumns.SelectionBackColor = Color.Yellow;
richTextBoxColumns.SelectionColor = Color.Red;

On

richTextBoxColumns.Select(line1Length + 19, 1);

Just change the "+ 19" part as your wish.

Debug this code and you will find that, your Font length has problem :)

This is one way to do it.

int markIndex = 0;
int startIndex = 0;
do
{
    markIndex = startIndex + 19;
    richTextBoxColumns.Select(markIndex, 1);
    richTextBoxColumns.SelectionBackColor = Color.Yellow;
    richTextBoxColumns.SelectionColor = Color.Red;
    startIndex = richTextBoxColumns.Text.IndexOf('\n', startIndex + 1);
} while (startIndex >= 0) ;
richTextBoxColumns.SelectedText = "";

The problem you will have is that you need to use a font with equal character spacing, such as Courier New, otherwise your vertical line will be less than straight.
white space still seems to be a problem, though.

Anyone else that have a solution for that?

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