visual studio - Hyperlink to a line of RichTextBox in C# -

i looking way create hyperlink in richtextbox pointing line of text of same richtextbox.

i found how internet links don't find way same text inside of control (it's hyperlinks in ms word pointing header or bookmark).

thanks in advance. - ccb

no, not work unless code necessary stuff yourself.

two suggestions:

• a simple workaround links starting www.
• the nicer solution arbitrary link text

let's have @ both options..:

• using built-in functionality of recognizing url seems right way start, link have look url, not hyperlink anchor.. if can live solution has, say, links this: www.goto.234 , anchors this: #234# rather simple..

a working example can simple this:

private void richtextbox1_linkclicked(object sender, linkclickedeventargs e) {     var s = e.linktext.split('.');     string anchor = s[2];      int = richtextbox1.text.indexof("#" + anchor + "#" );     if (a >= 0) richtextbox1.selectionstart = a; else return;  // add more checks!     richtextbox1.selectionlength = 0;     text = anchor + " @ " + a;     //richtextbox1.scrolltocaret();    <<--- crashes on machine!     // take jump out of click event , works:      timer ttt = new timer() { interval = 100 };     ttt.tick += (ss, ee) => { richtextbox1.scrolltocaret(); ttt.stop(); }; } 

• option two: if you'd rather have more choice of how links should read can this:

start formatting each

• start special character, tilde '~'
• format blue , underlined if want to
• either make 1 word or replace space underlines , format have forecolor equal backcolor

now can job:

public string delimiters = " ()[]{}!&?=/\\,;.\r\n";  private void richtextbox2_click(object sender, eventargs e) {     int sstart = -1;     string s = getwordat(richtextbox2.text,                           richtextbox2.selectionstart, delimiters, out sstart);     if (s.length < 3) return;     string char1 = s.substring(0, 1);     if (char1 == "~")     {         int p = richtextbox2.text.indexof("#" + s.substring(1));         if (p >= 0) { richtextbox2.selectionstart = p; richtextbox2.scrolltocaret(); }     } }  public static string getwordat(string text, int cursorpos,                                 string delimiters, out int selstart) {     int startpos = 0;     selstart = startpos;     if ((cursorpos < 0) | (cursorpos > text.length) | (text.length == 0)) return "";     if ((text.length > cursorpos) & (delimiters.contains(text[cursorpos]))) return "";     int endpos = text.length - 1;     if (cursorpos == text.length) endpos = text.length - 1;     else { (int = cursorpos; < text.length; i++)       { if (delimiters.contains(text[i])) { endpos = - 1; break; } } }     if (cursorpos == 0) startpos = 0;     else { (int = cursorpos; > 0; i--)      { if (delimiters.contains(text[i])) { startpos = + 1; break; } } }     selstart = startpos;      return text.substring(startpos, endpos - startpos + 1); } 

here 2 versions side side, once @ top after clicking on link:

both versions work fine, although both more checks.

note lazy format pseudo-links in second example, show tildes , hashes..

not hard write helper function can insert formatting; search still work searches in text, not rtf property..