RichTextBox中如查找所有符合条件的字符串

[jxqihan]

RichTextBox中如查找所有符合条件的字符串，并用底色标出，点击其它地方时底色消失。

[捷哥1999]

在RichTextBox查找关键词 ，以粗体显示。
http://topic.csdn.net/u/20100502/12/f78baf8d-0b53-4af8-9437-d2ffb9acb2de.html?seed=1507435281&r=65132120#r_65132120

[铛铛]

[Quote=引用 2 楼 lxcnn 的回复:]

string key = Regex.Escape(textBox1.Text);
Regex reg = new Regex(@"(?m)^" + key);
MatchCollection mc = reg.Matches(yourStr);
foreach (Match m in mc)
{
    richTextBox1.SelectionStart = m.Index;
    richTextBox1.SelectionLength = m.Value.Length;
    richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, FontStyle.Bold);
}

[/Quote]

[wuyq11]

Font f=new Font("Verdana", 8F, FontStyle.Italic, GraphicsUnit.Point);
string str="";
if (richTextBox1.Find(str)>0)
{
int pos=richTextBox1.Find(str);
richTextBox1.SelectionStart=pos;
richTextBox1.SelectionLength=str.Length;
richTextBox1.SelectionFont=f;
richTextBox1.SelectionColor=Color.Red;
}

[-过客-]

呵呵，这个是要根据实际情况调整的

string key = Regex.Escape(textBox1.Text);
Regex reg = new Regex(key);
MatchCollection mc = reg.Matches(yourStr);
foreach (Match m in mc)
{
    richTextBox1.SelectionStart = m.Index;
    richTextBox1.SelectionLength = m.Value.Length;
    richTextBox1.SelectionBackColor = Color.LightBlue;
}
//如果要忽略大小写，正则替换为
Regex reg = new Regex(@"(?i)" + key);

[兔子-顾问]

2楼就已经引用了2楼的回复，而且还是客客的。但实际5楼才出现客客。难道是csdn的bug？

[wxm3630478]

mark。。。。。

[qiuxue110]

string find = "string";
for (int i = 0; i < this.richTextBox1.Text.Length;i++ )
{
int index = this.richTextBox1.Find(find,i,RichTextBoxFinds.MatchCase);
this.richTextBox1.SelectionBackColor = Color.Red;
}

[qiuxue110]

string find = "string";
            for (int i = 0; i < this.richTextBox1.Text.Length;i++ )
            {
                int index = this.richTextBox1.Find(find,i,RichTextBoxFinds.MatchCase);
                this.richTextBox1.SelectionBackColor = Color.Red;
            }