Asp net html editor extender how to limit font size


ASP.NET is a popular programming language used for building dynamic web applications. One common requirement in web development is to limit the font size in an HTML editor extender. In this article, we will explore how to achieve this using ASP.NET.

Step 1: Setting up the HTML Editor Extender

To begin, we need to set up the HTML editor extender in our ASP.NET application. The HTML editor extender is a control that enhances the of a standard HTML textarea by providing additional such as font .

In the above code snippet, we have added a TextBox control and an HtmlEditorExtender control. The HtmlEditorExtender control is associated with the TextBox control using the TargetControlID property.

Step 2: Limiting the Font Size

Now that we have set up the HTML editor extender, we can proceed to limit the font size. We can achieve this by handling the OnClientLoad event of the HtmlEditorExtender control and the font size using .

In the above code snippet, we have added the OnClientLoad event to the HtmlEditorExtender control and associated it with the “limitFontSize” JavaScript function. Inside the function, we retrieve the HtmlEditorExtender control using the $find and access the toolbar and the font size combo box. We then set the maximum font size to 16 using the set_maxValue method.

Step 3: the Solution

Now that we have implemented the font size limitation, let's test our solution. Run the ASP.NET application and navigate to the page the HTML editor extender. Try selecting a font size than 16 from the font size combo box. You should observe that the font size is automatically limited to 16.


In this article, we have explored how to limit the font size in an HTML editor extender using ASP.NET. By handling the OnClientLoad event and modifying the font size using JavaScript, we can easily achieve this functionality. Remember to the maximum font size according to your requirements.

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