superscript and subscript in richtextbox in c#

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I created button controls for superscript and subscript for to display in richtextbox

when i inserting chars into richtextbox it will correct results

But after saving it will give no effect

My code is

SQL

if (btnSender.Name.ToUpper() == "BTNSUPERSCRIPT")
                        {
                            if (objRichText.SelectedText != null)
                            {
                                objRichText.SelectionCharOffset = 4;// 5;
                            }
                        }
                        else if (btnSender.Name.ToUpper() == "BTNSUBSCRIPT")
                        {
                            if (objRichText.SelectedText != null)
                            {
                                objRichText.SelectionCharOffset = -4;// -5;
                            }
                        }

Any suggestions

Posted 20-Dec-13 18:48pm

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Richard MacCutchan · Answer 1 · 2013-12-20T22:59:00

Solution 1

You are only changing the displayed data; you also need to add the RTF control codes to the saved data in your file. See the solutions to How to write subscript text in rtf file[^] for suggestions.

Posted 20-Dec-13 22:59pm

Richard MacCutchan