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Getting ASP.NET Source Representation of Programmatically Created Page

Im creating a page generator for ASP page. It takes XML input, and then converts it into ASPX representation.
During the process of conversion, here's some code i used,
var page = new Page();
var pnlUpdate = new UpdatePanel();
page.Controls.Add(pnlUpdate);
Theoritically, it should creates ASP file like this,
<% Page ...>
....
....
<asp:UpdatePanel>
</asp:UpdatePanel>
How do i get the source representation of my programmatically created page object? Using Filter or catching the HttpRespose output gives me the parsed HTML output, not the ASP one.

To my knowledge there is no code in .Net Framework that will convert control tree into APSX page.
You can write your own version (especially if you have very limited set of allowed control/properties) by walking control tree and generating ASPX as you go. Note that you'd need to know what properties are changed from default values...
It probably would be easier to go directly from XML to ASPX, you may be even able to have XSLT transformation to do so.

Evaluate c# code as string in a aspx file

I have this problem: From a database, held up a string, which contains HTML mixed with C# code. I wish I could run correctly both codes on my page .aspx.
e.g.
in my .aspx:
<div><%= Model.repo.getCode() %></div>
and the getCode() method give me this:
<div id="secondDiv"><p><%= Model.Person.Name %></p></div>
so I want the final html file look like:
<div><div id="secondDiv"><p>Jhon</p></div></div>
any suggestion?

There may be direct way to bind such value,
But if you could store String.Formatable into database then it would be easy to bind the data needed.
Using String.Format you achieve like,
returned string from Model.repo.getCode() (see curly braces)
"<div id="secondDiv"><p>{0}</p></div>";
And in ASP code,
<div><%= string.format(Model.repo.getCode(),Model.Person.Name) %></div>

Take a look at this project as it helped me with a similar problem: https://github.com/formosatek/dotliquid Basically you can bind whatever objects to a template and that template can call properties of you objects and even use conditional logic and loops.

How to get Label inner text from Codebehind

I have html label contol without runat="server"
Does it possible to get inner text from code behind c#?
Label:
<label id="lblClanName">Text Here</label>
Thanks

Every time an ASP.Net page is posted back to the server it is recreated from scratch using the custom code contained in the page (such as calls to a database), the HTTP post/get collections (which include ViewState), any custom data in Application, Cache, Session, static objects, etc.
If the value does not exist in any of those locations, the server doesn't have access to it. A common trick to pass data from the client is to simply use a hidden field. If you want something more elegant, you can use asynchronous AJAX to send/receive data from the server.
Or in this case, you could just add runat="server" to an asp:Label. ViewState will maintain the value between postbacks, though it will not reflect changes made client-side unless (once again) the data is somehow passed back to the server.
Note that ViewState is typically a bad thing because it essentially doubles the size of your data (or more) and (in my opinion) encourages sloppy design.

i don't think you can do it.either you can use js get the lable,and call js method from code behind

Short answer: no.
To access this from your code-behind, you will minimally need to add runat="server" to your label. This will allow you to access it using Page.FindControl(String).
The preferred approach, if you are able to modify the front-end code, would be to use an <asp:Label />. This will allow you easy access by just using the control's ID in the code-behind, specifically its Text property.

Do you want to know how to parse a string value for the inner html, or do you expect your web page do have text written to the label at runtime?
string labelHtml = "<label id="lblClanName">Text Here</label>";
XmlDocument doc = new XmlDocument();
doc.LoadXml(labelHtml);
string innerText = doc.DocumentElement.InnerText;
Why do you need the text between a label, is this for a live web page? This sound like a bad design more than a requirement.

parsing html, source code, javascript problem

http://booking.travel24.com/index.php?KID=610000&&id=lmpergebnis&showresult=1&detail=zielgebiet&region=-1&ziel=-1&termin=20.02.2011&ruecktermin=17.03.2011&dauer=-1&abflughafen=46&personen=25;25&kategorie=-1&verpflegung=-1&zimmer=-1
I am trying to parse some HTML parts of this page, but when I check the source code I can not find this: "Tunesien, Marokko".
If I check with xdeveloper I can see this as html:
<a class="reglreg" href="javascript:s_hliste(20009);">Tunesien, Marokko</a>
but if i check source code of the page I can't find this. Why?

If you view the source and search for "Marokko" you will see there are several places where it occurs (loaded as data in several JavaScript arrays).
It appears as if some of the content is produced dynamically through the JavaScript loaded onto the page. That JavaScript builds HTML and changes the page to include the content you are looking for.

To answer your first real question
Why?
Because when you check the source code inside a browser, you'll get the original html code. Then javascript comes along and modify the DOM which you can follow in any modern browser's console.
can i get somehow whole source code
then? if i can not see it in browser
how can i see it?
To make it simple, it depends how you're trying to parse it. With what language?

maybe the data is coming via AJAX call, so it's not there on the html at the start, but dynamically added to it.
if you need to parse this, you can try to "emulate" the ajax call yourself.

Server-side Javascript (aspx.cs) Attributes.Add Code to Change a Label's text

I am trying to change a label's text by using server-side JavaScript (onclick) and C# within the page_load event. For example, I would like to write something like the following:
Label1.Attributes.Add("onclick", "Label2.text='new caption'")
Does anyone know the correct code for this? Also, what is this type of code referred to; is it just JavaScript or JavaScript in C# or is there a specific name? Lastly, does a book or online resource exist that lists the choices of control.attributes.add("event", "syntax") code to use with C#?

There is no server-side Javascript (unless you change to a platform other than ASP.NET where you actually use Javascript as server language). What you are doing is adding an attribute to the html tag, and the code will be executed entirely on the client side.
First, let's look at how it's done in HTML without the server side code and server side controls:
<span onclick="document.getElementById('Label2').innerHTML='Thank you';">Click me</span>
<span id="Label2"></span>
To use Label controls instead, setting the onclick attribute from server side code, you would do like this:
Label1.Attributes.Add("onclick", "document.getElementById('Label2').innerHTML='Thank you';");
This will work as long as the controls are not inside a naming container. If they are, the id of the controls are prepended with the name of the container to keep them unique, so you need to use the ClientID property to find out what their final id is:
Label1.Attributes.Add("onclick", "document.getElementById('" + Label2.ClientID + "').innerHTML='Thank you';");
The ClientID always contains the id that you can use to access the element from Javascript, so the last code always works regardless if the control is in a naming container or not.
To find out what attributes you can use, you should look at the HTML documentation, for example the Internet Explorer documentation for the span element. When looking at the documetation for a specific feature, notice the Standards Information, as that will tell you if it works in any browser or just in Internet Explorer.

The code above adds JavaScript to a server control rendered on the client. Take a look at this MSDN article - Using JavaScript Along with ASP.NET for more information.
IIRC, you will need to reference Label2 by its ClientID and will need to write some JavaScript to change the label's text value (I think ASP.NET labels get rendered as <span> tags).