How to draw text on text of RichTextBox

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I want to draw text on the text of RichTextBox. For ex: i want to draw a word "hello" on the word
"hello" of RichTextBox whose text is "hello world!". How do i do it?

Posted 13-Mar-14 5:42am

TheKingofdemon33

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gggustafson · Answer 1 · 2014-03-13T07:31:00

Solution 1

Use one of the Graphics.DrawString[^] methods. This assumes you know how to position the string "hello" over the "hello" in "hello world". This is not trivial.

Posted 13-Mar-14 7:31am

gggustafson

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TheKingofdemon33 13-Mar-14 13:35pm

but it doesn't exactly draw the string over it.

gggustafson 13-Mar-14 14:55pm

That implies that you do not know one or more of the critical formatting parameters. If you are using

DrawString ( String, Font, Brush, Single, Single )

and are off by just one pixel, you will get a misaligned image. Likewise if the font is not exactly on, your result will also be misaligned.

If you have control over the RichTextBox generation process then you should have all the information you need. Also, then, you can select the text you want to redraw and perform the redrawing directly using RichTextBox methods.

Would you care to share the purpose of your efforts?