Is there a way to comment out markup in an .ASPX page?

Question

Is there a way to comment out markup in an .ASPX page so that it isn't delivered to the client? I have tried the standard comments  but this just gets delivered as a comment and doesn't prevent the control from rendering.

score 353 · Accepted Answer · answered Sep 23 '08 at 14:35

353

<%--
            Commented out HTML/CODE/Markup.  Anything with
            this block will not be parsed/handled by ASP.NET.

            <asp:Calendar runat="server"></asp:Calendar> 

            <%# Eval(“SomeProperty”) %>     
--%>

Source

answered Sep 23 '08 at 14:35

GEOCHET

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Herb Caudill · Answer 2 · 2012-05-29T20:21:17.530

Bonus answer: The keyboard shortcut in Visual Studio for commenting out anything is Ctrl-KC . This works in a number of places, including C#, VB, Javascript, and aspx pages; it also works for SQL in SQL Management Studio.

You can either select the text to be commented out, or you can position your text inside a chunk to be commented out; for example, put your cursor inside the opening tag of a GridView, press Ctrl-KC, and the whole thing is commented out.

score 31 · Answer 3 · edited Feb 15 '16 at 15:27

31

FYI | ctrl + K, C is the comment shortcut in Visual Studio. ctrl + K, U uncomments.

edited Feb 15 '16 at 15:27

Mosh Feu

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answered Sep 24 '08 at 08:12

Matthew M. Osborn

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Sklivvz · Answer 4 · 2015-05-18T11:40:55.843

27

<%-- not rendered to browser --%>

edited May 18 '15 at 11:40

answered Sep 23 '08 at 14:36

Sklivvz

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score 13 · Answer 5 · edited May 23 '17 at 12:34

13

I believe you're looking for:

<%-- your markup here --%>

That is a serverside comment and will not be delivered to the client ... but it's not optional. If you need this to be programmable, then you'll want this answer :-)

edited May 23 '17 at 12:34

Community

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answered Sep 23 '08 at 14:36

Joel Martinez

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score 12 · Answer 6 · edited Mar 24 '15 at 18:35

12

Yes, there are special server side comments:

<%-- Text not sent to client  --%>

edited Mar 24 '15 at 18:35

Mike G

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answered Sep 23 '08 at 14:36

stefano m

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score 9 · Answer 7 · answered Nov 10 '14 at 19:07

While this works:

<%-- <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ht_tv1.Default" %> --%>
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Blank._Default" %>

This won't.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" <%--Inherits="ht_tv1.Default"--%> Inherits="Blank._Default" %>

So you can't comment out part of something which is what I want to do 99.9995% of the time.

score 5 · Answer 8 · edited Feb 15 '16 at 15:28

5

Another way assuming it's not server side code you want to comment out is...

<asp:panel runat="server" visible="false">
    html here
</asp:panel>

edited Feb 15 '16 at 15:28

Mosh Feu

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answered Sep 23 '08 at 14:35

BigJump

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I did delete this answer as its not strictly 'commenting out'. However, Joel's answer refers to mine so for the time being I've undeleted it. – BigJump Sep 23 '08 at 14:46
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asp:PlaceHolder does the same but is designed to not generate any additional HTML. – billpg Sep 22 '11 at 14:45

Is there a way to comment out markup in an .ASPX page?

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