Rich Text Box - Bold
Here's some code I used one time :
var sb = new StringBuilder();
sb.Append(@"{\rtf1\ansi");
sb.Append(@"\b Name: \b0 ");
sb.Append((txtFirstName.Text);
sb.Append(@" \line ");
sb.Append(@"\b DOB: \b0 ");
sb.Append(txtDOBMonth.Text);
sb.Append(@" \line ");
sb.Append(@"\b ID Number: \b0 ");
sb.Append(txtIdNumber.Text);
sb.Append(@" \line \line ");
sb.Append(@"}");
richTextBox.Rtf = sb.ToString();
if you append @"\rtf1\ansi" you can use \b and \b0 to declare bold within the string. And \line creates a new line. You can also do underline, etc. I found it easier to build the String like this than applying properties.
This line is a problem:
textBox.Text += roomChatMessage.from + ": " + roomChatMessage.text + "\r\n";
You are replacing the formatting and the text with this new version of a string, and is probably picking up the bold font from the last update.
Try using AppendText instead:
textBox.AppendText(roomChatMessage.from + ": " + roomChatMessage.text + "\r\n");
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 :)
In Visual Studio you can use this short code:
richTextBox1.Rtf = @"{\rtf1\ansi This is in \b bold\b0.}";
It will be:
This is in bold