Fw: [Mono-dev] header have been already sent ?

Bernhard Herzog schwimmlehrer at gmail.com
Fri Sep 9 05:47:12 EDT 2005

I think I know now why I get duplicate Response.Write and Console.WriteLine 
outputs: It is because of the following line in the web.config:

  <trace enabled="true" requestLimit="40" pageOutput="false" 

Source code in InternalProcessRequest in System.Web.UI/Page.cs:

969:  Trace.Write ("aspx.page", "Begin Render");
970:  HtmlTextWriter output = new HtmlTextWriter (_context.Response.Output);
971:  RenderControl (output);
972:  Trace.Write ("aspx.page", "End Render");
974:  RenderTrace (output);

When I comment out the "RenderTrace" line I get the output only once, when 
this method is called the page is rendered twice. But only when trace-output 
is enabled (no matter if pageOutput is false or true).


----- Original Message ----- 
> Unfortunately I am still having this problem (Console.WriteLine coming 
> twice
> and Response.Write coming again at the end of page). Here is a simple test
> case. But if that is working for everybody else I will have to wait for 
> the
> next release of Mono and if I am seeing it there, I will file a bug 
> report.
> Many thanks to the Mono team for the great work
> Bernhard
> write.aspx Output:
> This is write.aspx body. Doing some Response.Write output END OF PAGE 
> Doing
> some Response.Write output
> ----- Original Message ----- 
>> On Wed, 2005-09-07 at 23:49 +0200, Bernhard Herzog wrote:
>>> >> The login bug is fixed. Chris is taking care of the validation 
>>> >> summary
>>> >> not being shown when the 'name' field is empty.
>>> >
>>> > The validation summary fix should be in as well.
>>> Yes, that does work. I also verified the problem with the login.ascx
>>> Still on my list is:
>>> (3) Response.Output.Write output coming again at the end of the page
>>> http://lists.ximian.com/pipermail/mono-devel-list/2005-September/014557.html
>> I cannot reproduce this problem with current SVN.
>>> (4) Multipart forms not working
>>> http://lists.ximian.com/pipermail/mono-devel-list/2005-September/014558.html
>> This is already fixed in SVN.
>>> New Bug/Problem?
>>> (5) simple.aspx: A page is rendered twice? The Console.WriteLine in the
>>> page
>>> is called twice. My Output is:
>> I can't reproduce this either.
>> Thanks.
>> -Gonzalo
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