HttpWebRequest Example Using "GET" [Answered]RSS

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Last post Aug 25, 2011 08:17 AM by Marky2245

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DeskingFan
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46 Posts

HttpWebRequest Example Using "GET"

Nov 05, 2007 12:36 PM|DeskingFan|LINK

Hi All,

My classic asp application uses XML Templates to retrieve an XML document via SQL Server 2000 and the MSXML2.ServerXMLHTTP.4.0 object. I need to convert this to asp.net in c# and need to find a good example that will help me accomplish this. I see a lot of examples using POST and the HttpWebRequest object but I need a simple example using httpWebRequest.Mehod = "GET" to load the XML document created by the SQL Server 2000 XML Template.

I've been unsuccessful searching on the web.

Thanks.
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foreachbiscu...
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210 Posts
Re: HttpWebRequest Example Using "GET"

Nov 06, 2007 01:33 PM|foreachbiscuit|LINK
Have you tried using the HttpWebResponse stream?
```
HttpWebRequest request = (HttpWebRequest) WebRequest.Create(url);
HttpWebResponse response = (HttpWebResponse) request.GetResponse();

Stream stream = new Stream(response.GetResponseStream());
```
obviously you can use any class that derives from stream - whatever is appropriate for the response.
See this msdn link for more information:

HttpWebResponse.GetResponseStream Method
Regards,
foreachbiscuit
blog @ http://foreachbiscuit.wordpress.com
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DeskingFan
Member

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46 Posts

Re: HttpWebRequest Example Using "GET"

Nov 06, 2007 02:03 PM|DeskingFan|LINK

Thanks for your suggestion, I actually got this to work yesterday afternoon. Here is the solution:

        public static XmlDocument getXMLDocumentFromXMLTemplate(string inURL)
        {
            HttpWebRequest myHttpWebRequest = null;     //Declare an HTTP-specific implementation of the WebRequest class.
            HttpWebResponse myHttpWebResponse = null;   //Declare an HTTP-specific implementation of the WebResponse class
            XmlDocument myXMLDocument = null;           //Declare XMLResponse document
            XmlTextReader myXMLReader = null;           //Declare XMLReader

            try
            {
                //Create Request
                myHttpWebRequest = (HttpWebRequest) HttpWebRequest.Create(inURL);
                myHttpWebRequest.Method = "GET";
                myHttpWebRequest.ContentType = "text/xml; encoding='utf-8'";

                //Get Response
                myHttpWebResponse = (HttpWebResponse) myHttpWebRequest.GetResponse();

                //Now load the XML Document
                myXMLDocument = new XmlDocument();

                //Load response stream into XMLReader
                myXMLReader = new XmlTextReader(myHttpWebResponse.GetResponseStream());
                myXMLDocument.Load(myXMLReader);
            }
            catch (Exception myException)
            {
                throw new Exception("Error Occurred in AuditAdapter.getXMLDocumentFromXMLTemplate()", myException);
            }
            finally
            {
                myHttpWebRequest = null;
                myHttpWebResponse = null;
                myXMLReader = null;
            }
            return myXMLDocument;
        }
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pbromberg
Contributor

2843 Points

524 Posts

Re: HttpWebRequest Example Using "GET"

Nov 06, 2007 02:50 PM|pbromberg|LINK

You can do all of this in 2 lines of code:

XmlDocument myXMLDocument = new XmlDocument();

myXMLDocument.Load(url);

[C# MVP]
<a href="http://peterbromberg.net>PeterBromberg.net
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DeskingFan
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46 Posts

Re: HttpWebRequest Example Using "GET"

Nov 06, 2007 03:53 PM|DeskingFan|LINK

Thanks, that also worked and so much less code..
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bkthomson
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34 Posts
Re: HttpWebRequest Example Using "GET"

Jul 23, 2008 10:06 AM|bkthomson|LINK
I'm trying to do something similar to the client-side XMLHttpRequest object where I call a web page in my site and pull back the rendered HTML.

I reviewed the thread took the two working example. . in both cases I'm still having problems.

1) With the XMLDocument example
```
XmlDocument  myXMLDocument = new XmlDocument();

try
{
	myXMLDocument.Load(Page.ResolveUrl("Collect.aspx") );
}
catch (Exception ex)
{
	System.Diagnostics.Debug.WriteLine( ex.Message );
}
```
I get receive the following error: "Could not find a part of the path \"C:\\OpenPointOne\\XMLHttpRequest\\Collect.aspx\"."

When I pull the Page.ResolveURL and just call "Collect.aspx" I receive "Could not find file \"C:\\WINDOWS\\system32\\Collect.aspx\"."

I also attempted to use the public static XmlDocument getXMLDocumentFromXMLTemplate(string inURL)

but the errors come out like

myException.Message
"Invalid URI: The format of the URI could not be determined."
inURL
"/OpenPointOne/XMLHttpRequest/Collect.aspx"
Any other suggestions?
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Marky2245
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Re: HttpWebRequest Example Using "GET"

Aug 25, 2011 08:17 AM|Marky2245|LINK

I'm trying to change the URI using the get method, basically I want to send commands to a DVI switch

Am I right by using HttpWebRequest

HttpWebRequest^ myReq = dynamic_cast<HttpWebRequest^>(WebRequest::Create( m_DVIswitch ));


               // Set 'Method' property of 'HttpWebRequest' class to POST.
               myReq->Method = "GET";
               ASCIIEncoding^ encodedData = gcnew ASCIIEncoding;
               array<Byte>^ byteArray = encodedData->GetBytes( m_SysString );
               // Set 'ContentType' property of the 'HttpWebRequest' class to S"application/x-www-form-urlencoded".
               myReq->ContentType = "application/x-www-form-urlencoded";

               myReq->ContentLength = byteArray->Length;
               Stream^ newStream = myReq->GetRequestStream();
           //   Uri^ myUri = gcnew Uri(uriString);
//       //       myUri =myReq->RequestUri();

               newStream->Write( postArray, 0, byteArray->Length );
               //Console::WriteLine( "\nData has been posted to the Uri\n\nPlease wait for the response.........." );
               // Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
               HttpWebResponse^ myResponce = (HttpWebResponse^)( myReq->GetResponse() );