Remove whitespace from your pages

10/22/2007 8:20:02 AM #

Hi Mads,
Good for us that you have such obsessions  
Thanks for sharing.
Why don't you put this code in one of the modules that already in the site?

Miron

Miron Abramson |

10/22/2007 9:50:27 AM #

I concer with Miron

Mark kemper |

10/22/2007 3:13:05 PM #

I like the idea, but would love to see some stats on this - how does the increased rendering time server-side compare to the time saved client-side?

Fredrik |

10/22/2007 4:07:43 PM #

Thanks for sharing Mads, I was waiting for a 360° solution like this  

NinjaCross |

10/22/2007 4:25:39 PM #

I use this sometimes, but I think you need to be careful about spaces inside TEXTAREA.

Michel |

10/22/2007 6:58:59 PM #

Im using:

System.IO.StringWriter stringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWriter = new System.Web.UI.HtmlTextWriter(stringWriter);
base.Render(htmlWriter);
System.Text.StringBuilder htmlData = new System.Text.StringBuilder(stringWriter.ToString());

.. move postbeck controls downpage

//remove whitespace
html.Replace("  ", String.Empty);
html.Replace("\t", String.Empty);
html.Replace("\r\n", String.Empty);

writer.Write(htmlData.ToString());

..

Do you thing REGEX is faster like stringreplace?

spybot |

10/23/2007 2:09:17 AM #

@spybot

I think Regex is faster.

Brian |

10/23/2007 4:06:14 AM #

Having issues with AJAX postback. For now I put in a condition to not do anything for Request["HTTP_X_MICROSOFTAJAX"] == null and seems to work. Might be nice to do the same for AJAX returns though - prolly some regex magic needed.

michael |

10/23/2007 4:07:31 PM #

This piece of code isn't working for me in textareas where you include more than one line break:

private static readonly Regex REGEX_LINE_BREAKS = new Regex(@"\n\s+", RegexOptions.Compiled);

Right now i am using only the first regex, but it would be great to have a piece of code that solves this, without affecting the content in textareas.

Dactivo |

10/29/2007 10:09:10 PM #

Pingback from mhinze.com

21 Links Today (2007-10-29)

mhinze.com |

11/16/2007 9:02:37 AM #

but when my page any  contain javascript comment
such as

<script type="javascript">
// here is  a line comment.
var myComment = "a line comment";
alert(myComment);
</script>

when remove the "\n"

it was changed to

<script type="javascript">// here is  a line comment. var myComment = "a line comment"; alert(myComment);</script>

so... javascript error.

how ???

huobazi |

3/24/2008 8:14:05 PM #

Converted to VB.net and works perfect! Thank you!!

sharona |

4/4/2008 4:34:34 AM #

Hi,

I really would like to use this, but i have one problem and i think you are the guru so i will explain you:

I need to remove tabs, whitespaces, and line breaks but only for the text outside the tags <report></report> (this is non standard i think, but we use it on a specific platform to generate reports)

So the content:


< p align = "center" > Hello              World!!< /p >
Follows is the report :
<report>
Hello everybody the balance is         : 250.00 usd

You can use it until tomorrow

        Regards        
</report>

This should finish like this:

<p align="center">Hello World!!</p>Follows is the report:<report>
Hello everybody the balance is         : 250.00 usd

You can use it until tomorrow

        Regards        </report>


I hope you can answer me Mads or someone other with expertise.

Thank you very much!

alex |

4/24/2008 4:40:16 AM #

Pingback from pimp.webdevelopernews.com

Removing Whitespace From Your Pages With ASP.NET

pimp.webdevelopernews.com |

7/17/2008 7:12:34 PM #

The idea is good and worth trying. But check twice before going live. This method ruins your ajax and javascript if you use any.

Alex |

9/14/2008 12:41:16 PM #

ASP.NET MVC: Remove Page Whitespace

I just spent a whole 4 hours trying to figure out the best way to get my whitespace off my rendered HTML

Zack Owens |

9/24/2008 9:44:06 PM #

Have you been able to get this to work with AJAX? I dosen't work for postbacks

Nino |

10/27/2008 11:21:02 PM #

I'll second Nino's comment: has anyone gotten a whitespace removal solution to work with ASP.NET AJAX postbacks?

Yes, there are ways to make whitespace removal work for the standard requests and be disabled for AJAX requests, but I've been unable to find a solution that will successfully trim the whitespace in AJAX postbacks.

Al |

2/9/2009 7:50:20 AM #

Thanks for the great article, it has been really useful in the sites that I have developed.

I struggled on the asp.net AJAX post-back for a while until I looked at the source code for the page and noticed that the function __doPostBack was surrounded by JavaScript comments //.

//<![CDATA[
var theForm = document.forms['aspnetForm'];
if (!theForm) {
    theForm = document.aspnetForm;
}
function __doPostBack(eventTarget, eventArgument) {
    if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
        theForm.__EVENTTARGET.value = eventTarget;
        theForm.__EVENTARGUMENT.value = eventArgument;
        theForm.submit();
    }
}
//]]>


After the white space compression has removed tabs, newlines etc the JavaScript above appears on one line. This makes the whole thing appear as a comment and therefore the reason you get problems with post backs in .Net when using AJAX.


The solution I wrote for my sites is:

    html = REGEX_BETWEEN_TAGS.Replace(html, "> <");
    html = REGEX_LINE_BREAKS.Replace(html, string.Empty);
    html = html.Replace("\r", "");
    html = html.Replace("//<![CDATA[", "");
    html = html.Replace("//]]>", "");
    html = html.Replace("\n", "");

Barry Jones |

3/27/2010 4:20:36 PM #

Nutzlosen Whitespace zur Laufzeit aus dem HTML entfernen

Nutzlosen Whitespace zur Laufzeit aus dem HTML entfernen

klaus_b@.NET |