ASP.NET: How to correctly comment markup code
Original call to HTML Helper
produced the following exception
HTML Helper Exception
In order to analyze the problem I started with commenting the codeline in question like this
Wrong way to comment code in ASP.NET
Well – unfortunately that is not the way to comment source code in your markup file. This markup code gets compiled into the temporary .NET Assembly like this
Generated Code based on Markup Code
Even though the output of my HtmlHelper call will be under comments in the final HTML – the method is still called – causing the same exception to happen.
To do this right – you have to comment the code within the code block like this
Correct way to comment code in ASP.NET Markup
Conclusion
Makes sense? Yes – it does. But if you don’t know it you may be surprised about the result.
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What’s wrong with server-side comments?
≶%– This is commented-out –>
<%– This is commented-out –%>
Damn those unescaped blog comments…
@cw: Thanks for that
You are right – the “proper” way would be to use server-side comments.
There is a nice blog-entry worth checking out: http://weblogs.asp.net/scottgu/archive/2006/07/09/Tip_2F00_Trick_3A00_-Using-Server-Side-Comments-with-ASP.NET-2.0-.aspx
I just wanted to make the point that – using xml style comments in your markup code doesn’t do what you may think.
Thank you in advance for your quick answer !. Very nice post.
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asp.net comments using server side comments that can disabled code controls in the page.
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Thanks for the “correct” way on how to do it
Bear Spray
The better way is to use Visual Studio.NET’s multi-line comment functionality. Just the ‘Text Editor’ toolbar must be checked under Tools / Customize… / Toolbars.
BR,
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Even though the output of my HtmlHelper call will be under comments in the final HTML – the method is still called – causing the same exception to happen.
the point that – using xml style comments in your markup code doesn’t do what you may think.PO Box
asp.net comments using server side comments that can disabled code controls in the page.
I am working with an ASP.NET MVC Application and had problems with some of my calls to the HtmlHelper Extension functions. The following code
Even though the output of my HtmlHelper call will be under comments in the final HTML – the method is still called – causing the same exception to happen.
Thank you in advance for your quick answer !. Very nice post.
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asp.net comments using server side comments that can disabled code controls in the page.