RichTextBox in a Single Textbox Among Multiple TinyMCE - CodeProject


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Some time ago, I wrote a post about integration of TinyMCE editor in ASP.NET website. The same was also published in CodeProject and most visited article of mine. While answering comments there, I got a request from one of the readers.

His question was, “I have used TinyMCE Rich TextBox in my application but in my web form I have multiple multiline TextBox. What I want that Rich TextBox should be bind to only one text box not all TextBoxes.


So the solution is here. Let's create a scene as below:

Here, we have to convert TextArea for about to Rich Text Editor (WYSIWYG). Let's view the source code of the above design. I have tried to use simple HTML5 tags so that other users can also take advantage of this tutorial.

<%@ Page Language="C#" AutoEventWireup="true" 

CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html>

<head runat="server">
<title>Rich Text Editor in Single TextArea among many</title>
<form id="form1" runat="server">
<h1>Rich Text Editor in Single TextArea among many</h1>
<legend>Profile Update</legend>
<input type="text" id="txtName" runat="server" />
<input type="radio" name="Gender" 

id="radioMale" runat="server" value="Male" />
<input type="radio" name="Gender" 

id="radioFemale" runat="server" value="Female" />
<label>Email ID</label>
<input type="text" id="txtEmail" runat="server" />
<textarea rows="5" cols="50" 

id="txtAbout" class="Editor" runat="server"></textarea>
<textarea rows="2" cols="50" 

id="txtremarks" runat="server"></textarea>
<asp:Button ID="btnSubmit" Text="Submit" runat="server" />
<input type="reset" value="Clear Form" runat="server" />

Here, we are using TinyMCE version 4.0.xx. This version is a major upgrade and has a completely different look and internal architecture compared to version 3.xx. So here is some difference in its integration. If you are not familiar with this process, please read our previous post, that will describe to you about Copying required files in project directory and inserting script in more details. Insert the below code before closing of head tag in your HTML page.

<script src="script/tinymce/tinymce.min.js" type="text/javascript"></script>
<script type="text/javascript">
selector: ".Editor",
theme: "modern",
plugins: ["lists link image charmap print preview hr anchor pagebreak"],


Notable and new code in above integration script is selector tag. This is a new included tag in TinyMCE version 4.0.xx. This gives us the below options.
Do not forget to change the path to Script as per your folder structure.

  • selector : “textarea”

    : This option will convert all TextAreas in visual editor.

  • selector : “textarea.Editor”

    : This option will select all TextAreas with CSS Class Editor applied.

  • selector : h1.Editor

    or div.Editor : This option will change this to Inline editor for H1 or DIV with CSS class name of Editor.

As you see in the code of the scene designed above, you can see that we have applied class Editor which we did not create in any CSS file to one of the TextAreas. Here we used this method.

Older Version

If you are working with TinyMCE version 3.xx, here is the code to be inserted in Head section of HTML page.

[javascript] <script type="text/javascript"
<script type="text/javascript" language="javascript">
// General options
// mode: "textareas",
// Set mode to Exact.
//mode: "exact",
// Write the name of ID of TextArea where you want editor to appear in element property.
elements : "txtRemarks",
theme: "advanced",
plugins: "pagebreak,style,layer,table,save, advhr,advimage,advlink,emotions,iespell,inlinepopups",


Now, the output of the above work is below:

It's perfect.
If you find this tip helpful, drop a comment or share with your friend.
+John Bhatt