C# ASp.net InputFormTextBox Html issue

Hi,
I used following code to create  InputFormTextBox, When i copy from excel sheet some records it will automatically creating
unnessary codes. See below

<P>
<TABLE style="WIDTH: 48pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width=64 border=0>
<COLGROUP>
<COL style="WIDTH: 48pt" width=64>
<TBODY>
<TR style="HEIGHT: 17.25pt" height=23>
<TD style="BORDER-TOP: #f0f0f0; HEIGHT: 17.25pt; BORDER-RIGHT: #f0f0f0; WIDTH: 48pt; BORDER-BOTTOM: #f0f0f0; BORDER-LEFT: #f0f0f0; BACKGROUND-COLOR: transparent" height=23 width=64><FONT face=Calibri>Test<FONT class=font5><SUP>2</SUP></FONT></FONT></TD></TR></TBODY></TABLE></P>


I need only copying and paste to InputFormTextBox ,Please some one show me how to do.I already Ask user to enter
starting point £ and end of sentance £,throught that im removing HTML code,But its time consuming,so any one show me any better way or how to avoid this issue
Expected Results

Test<SUP>2</SUP>

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Seebelow my C# code How to creating InputFormTextBox

private InputFormTextBox richTextEditor

     richTextEditor = new InputFormTextBox();
            richTextEditor.RichText = true;
            richTextEditor.RichTextMode = SPRichTextMode.FullHtml;
            richTextEditor.TextMode = TextBoxMode.MultiLine;
           

            richTextEditor.Width = System.Web.UI.WebControls.Unit.Percentage(100);  
            richTextEditor.Rows = 10;
           
            richTextEditor.Enabled = true;
            richTextEditor.Visible = true;
            //Panel1.Controls.Add(richTextEditor);
            Panel_Disclaimer.Controls.Add(richTextEditor);
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ukerandiAsked:
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Jitendra PatilSr.Software EngineerCommented:
hi ukerandi,

first of all, let me tell you i am not a sharepoint guy, but i will try my best to solve your issue, as i have little knowledge of SP.

as per your code you are providing the SPRichTextMode.FullHtml;  which means it will  Display enhanced rich text, including pictures, tables, and hyperlinks.

you can try with Compatible mode which says  it will Display plain text, or display rich text with bold, italic, or text alignment

for your reference you can check the below link
SPRichTextMode enumeration

as you are using a RichTextbox editor with fullhtml mode it will automatically generate an HMTL for what ever text you provide in it,
copy and pasting from Excel includes Table, due to which it includes the above HTML code for particular record.

Hope this helps.
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