Read XML request in ASP.NET

I'm trying to port an ajax app from ASP to ASP.NET (not sure if its 2.0, or how to tell). I have an [index.asp] page that makes ajax calls to [process.asp] page.   I use this code to grab the background xml requests arriving at [process.asp]  :
------------------------------------------------------------
Set xmlDoc = Server.CreateObject("Microsoft.XMLDOM")
xmlDoc.async="false"
xmlDoc.load(request)
------------------------------------------------------------

How do i do the same thing for ASP.NET ? ...  here's an example xml string that's sent :

-------------------------------------
<?xml version="1.0"?>
<user task="userLookup">
<queryString>SELECT firstName FROM users</queryString>
</user>
-------------------------------------

Please help !
LVL 5
GitchoAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Christopher KileCommented:
You can use virtually the same code if you create an Interop assembly that wraps the COM object you're using.  I don't necessarily recommend that, but without knowing all the functionality you might be using, I don't really know where to direct you in the .NET CLR functions for XML management.
0
GitchoAuthor Commented:
thx, but I'd prefer the syntax for reading an XML request in ASP.net ...  
0
Christopher KileCommented:
Well, just to be clear, it is not a case of "what is the syntax" but "what libraries are we using, what functions are you calling, and what parameters do they expect".  

With that in mind, I have never worked with the XMLDOM control before and do not know exactly what parameters IT expects.  For instance, in the statement

xmlDoc.load(request)

what type of argument is request?

Regardless of my own questions, I believe the information in the following two links will be very helpful to you:

http://msdn2.microsoft.com/en-us/library/hf9hbf87(VS.80).aspx
http://msdn2.microsoft.com/en-us/library/system.xml.xmldocument(VS.80).aspx


0
Bootstrap 4: Exploring New Features

Learn how to use and navigate the new features included in Bootstrap 4, the most popular HTML, CSS, and JavaScript framework for developing responsive, mobile-first websites.

GitchoAuthor Commented:
sorry cpkilekofp ... that doesn't help ... i'm familiar with those links (XMLDOM overview).  What I need is the syntax for reading XML data posted to an ASP.NET page.  I provided an example of what type the "request" object is in my original question (the XML string), but "xmlDoc.load(request)" is classic ASP syntax, and not what I'm looking for.
0
Christopher KileCommented:
OK...you have a response coming from a URL from which you have requested XML information, and you want to load it as XML...I think I understand you now, the "request" thing threw me.

When you say "AJAX calls", what object is mediating the request?  I have no idea what this looks like in ASP, but in ASP.NET my assumption is that you're using some descendant of WebRequest.  You'll tell the WebRequest to GetResponse, which will return a WebResponse.  The body of the response is returned as a Stream by GetResponseStream.  It is this body that will contain your XML. SO....

Dim xmlDoc as New System.XML
Dim urlString as String = <whatever URL the XML is being provided by>

xmlDoc.Load(System.WebRequest.Create(urlString).GetResponse().GetResponseStream())

...should be the code to get that XML and load it into an XML document.
0
GitchoAuthor Commented:
i get this error :

Compiler Error Message: BC30182: Type expected.
0
GitchoAuthor Commented:
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: BC30182: Type expected.

Source Error:


Line 1:  <%
Line 2:  Dim xmlDoc as New System.XML
Line 3:  Dim urlString as String = "<whatever URL the XML is being provided by>"
Line 4:  
 
0
GitchoAuthor Commented:
error is on line 2
0
Christopher KileCommented:
Ouch, sorry.

Dim xmlDoc as New System.XML

should be

Dim xmlDoc as New System.Xml.XmlDocument
0
GitchoAuthor Commented:
I think you're a bit confused ... the XML is arriving at the page as POST, not being retrieved by the page ... the receiving aspx page is simply a processor that returns more xml ...


This is the code I use on the receiving ASP page :

Set xmlDoc = Server.CreateObject("Microsoft.XMLDOM")
xmlDoc.async="false"
xmlDoc.load(request)

This is the javascript code that sends :

function sendXML(sData,querystring,resultHandlerFunction,targetPage)
{
      targetPage = targetPage ? targetPage : constXMLpage;
      url = targetPage + "?rand=" + (new Date().getTime()) + "&" + querystring;
      xmlhttp.Open("POST", url, true, "", "");
      xmlhttp.setRequestHeader("Content-Type","text/xml");
      xmlhttp.Send (sData);
      window.status = "Load in progress ........ ";
      xmlhttp.onreadystatechange = function () {
            if (xmlhttp.readyState == 4) {
                  if (resultHandlerFunction) {
                        eval(resultHandlerFunction);
                  } else {
                        XMLResponseHandler(xmlhttp.ResponseText,xmlhttp.ResponseXML);
                  }
                  window.status = "XML object loaded successfully.";
            }
      };
};

0
Christopher KileCommented:
Mmm, yes, I did get confused.  

I'm now assuming that you've already parceled out request As String from the content sent to you, so request contains simply the XML you sent.

Dim xmlDoc as New System.Xml.XmlDocument
xmlDoc.Load(New StringReader(request))

This will load the xmlDoc for you. There is no Load function for an XML string itself, the only Load that accepts a string argument expects a URL in the string, not the XML itself, but there is a Load function for a TextReader, and a StringReader is a class derived from TextReader, so it is compatible.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Christopher KileCommented:
I'd bet quite a bit of, hmmm, vanity that my last post described his solution, which by this time seemed to me to be a method for loading an XMLDocument from a String, and that all that remained would be to debug and test.  
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
ASP.NET

From novice to tech pro — start learning today.