Rich Text Box - Bold

c# richtextbox
Tom O picture Tom O · Jun 24, 2013 · Viewed 44.4k times · Source

I know there are loads of "how to bolden text" questions on here, but none of the answers are helping, I think it may be that the Rich Text Box is being created at runtime.

I'm making a chat client, so I have a rich text box split up in lines and the messages are as follows: {Name}: {Message} \r\n

I want to bolden the name, I have tried many code examples, but this is the closest I've got to it working:

int length = textBox.Text.Length;
textBox.Text += roomChatMessage.from + ": " + roomChatMessage.text + "\r\n";
textBox.Select(length, roomChatMessage.from.Length);
textBox.SelectionFont = new Font(textBox.Font, FontStyle.Bold);

The first message, it works perfectly fine, the name is in bold. But when I add a second message, everything turns bold even though the second time round I'm selecting the start index (Which is this example is 37) but everything just turns bold, all the past messages too!

Any idea to what may cause this? Thanks in advance!

Answer

Sujay picture Sujay · Nov 28, 2013 
 ObjRichTextBox.SelectionFont = new Font(ObjRichTextBox.Font, FontStyle.Bold);

 ObjRichTextBox.AppendText("BOLD TEXT APPEARS HERE");

 ObjRichTextBox.SelectionFont = new Font(ObjRichTextBox.Font, FontStyle.Regular);

 ObjRichTextBox.AppendText("REGULAR TEXT APPEARS HERE");

Hope this helps :)

Related questions

RichTextBox (WPF) does not have string property "Text"

I am trying to set/get the text of my RichTextBox, but Text is not among list of its properties when I want to get test.Text... I am using code behind in C# (.net framework 3.5 SP1) RichTextBox test = new …

Read More
Color different parts of a RichTextBox string

I'm trying to color parts of a string to be appended to a RichTextBox. I have a string built from different strings. string temp = "[" + DateTime.Now.ToShortTimeString() + "] " + userid + " " + message + Environment.NewLine; This is what the message would look like once …

Read More
Displaying tooltip on mouse hover of a text

I want to display a tooltip when the mouse hovers over a link in my custom rich edit control. Consider the following text: We all sleep at night . In my case the word sleep is a link. When the user …

Read More