A solution to the problem that there is always a newline character when C merges multiple RichTextBox contents

   Previous post 《C# Merge to show multiple richtextbox and textbox Control 》 Describes how to put different richtextbox Control contents are merged together , Without changing the content format . But in practice , Put two richtextbox The contents of the control are merged and displayed in another richtextbox In the middle of the day , It always appears as two lines , Instead of putting two paragraphs together , The results are shown in the following figure ：

   Debugging program , Look at the first one richtextbox Medium rtf Content （ As shown below ）,rtf Last self-contained content \r\n A newline , At first, I thought this was the reason , In splicing rft Before the content , call string.TrimEnd Function to get rid of \r\n, But it didn't work , After splicing the content, it will still become two lines .

“{\rtf1\ansi\ansicpg936\deff0\nouicompat\deflang1033\deflangfe2052{\fonttbl{\f0\fnil\fprq2\fcharset0 GDT;}{\f1\fnil\fcharset134 Microsoft YaHei UI;}}\r\n{\*\generator Riched20 10.0.17763}\viewkind4\uc1 \r\n\pard\kerning2\f0\fs21 xyz\kerning0\f1\fs18\lang2052\par\r\n}\r\n”

   Then check richtextbox Control properties or functions , See if there are properties or functions that control line wrapping , The first thing we found was WordWrap attribute , This property indicates whether the multiline edit control automatically wraps lines , The default value is True, Change the attribute value to False, rerun routine , It is still spliced into two sections .
   Then hold a try mentality , take richtextbox Medium Multiline Property changed to False, This property controls whether the text of the edit control can span multiple lines , From the description of attributes , I can't see that this attribute will automatically insert line breaks between different contents , But will Multiline Property changed to False after , Then execute the procedure , You can combine the two paragraphs into one line . Because there will be no multi line situation in actual use , There is no need to worry about the situation where two paragraphs are put together in more than one line .

   The above tests are used VS Self contained richtextbox Control , If you use dev Control richtextbox Control , Its document Built in attribute appendrtf and appendtext Function can automatically merge the contents together without newline .