只读richtextbox更改关键字C#的颜色 [英] Readonly richtextbox changing color of keyword C#
问题描述
我有一个丰富的文本框,用于显示Hello World程序的示例,并希望诸如使用,命名空间,类,静态,无效,字符串之类的关键字显示为蓝色。
I have a rich text box that i am using to display an example of the Hello World program and want the keywords such as 'using' 'namespace' 'class' 'static' 'void' 'string' to display blue.
我有正在使用显示为蓝色,但是只有当用户开始键入或键入正在使用
时,我才希望仅将richtextbox只读允许用户输入
I have got 'using' to display blue but only when the user starts to type or types 'using' I want the richtextbox to be read only not allowing an user input into it
这是我的代码:
private void rtb_TextChanged(object sender, EventArgs e)
{
string find = "using";
if (rtb.Text.Contains(find))
{
var matchString = Regex.Escape(find);
foreach (Match match in Regex.Matches(rtb.Text, matchString))
{
rtb.Select(match.Index, find.Length);
rtb.SelectionColor = Color.Blue;
rtb.Select(rtb.TextLength, 0);
rtb.SelectionColor = rtb.ForeColor;
};
}
}
我很难弄清楚该怎么做只读rtb。
我如何编辑代码以在只读rtb中初始化时显示蓝色文本
I am having trouble figuring out how to do it for readonly rtb. How could i edit my code to display the blue text on initialize in a readonly rtb
感谢您的帮助
推荐答案
无需订阅 TextChanged
事件。
将代码放在单独的方法中:
Place your code in a separate method:
private void ApplySyntaxHighlite()
{
string find = "using";
if (richTextBox1.Text.Contains(find))
{
var matchString = Regex.Escape(find);
foreach (Match match in Regex.Matches(richTextBox1.Text, matchString))
{
richTextBox1.Select(match.Index, find.Length);
richTextBox1.SelectionColor = Color.Blue;
richTextBox1.Select(richTextBox1.TextLength, 0);
richTextBox1.SelectionColor = richTextBox1.ForeColor;
};
}
}
在 RichTextBox
:
richTextBox1.Text =
"using System;\r\nusing System.IO;\r\n\r\nConsole.WriteLine(\"Hello world.\");";
ApplySyntaxHighlite();
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