Visual Studio .NET - The Root Element is Missing problem

I have an application which processes a stream received from a request, as in Request.InputStream. I am passing XML data to this for processing. The problem I am having is when I attempt to load the stream produced by Request.InputStream, I get an exception thrown as "The Root Element is missing". I decided to run a debug and write out the stream to an XML file and it looked ok to me, can anybody help me out on this one?

Here is the code I am using:

XmlDocument xDoc = null;
xDoc = new XmlDocument();
xDoc.Load(request.InputStream);
xDoc.Save(@"C:\Tester.xml");
stream = request.InputStream;

//Process the stream

public static string Process(Stream waveRunnerMessage)
{
   XmlDocument requestDoc = new XmlDocument();
   XmlDocument responseDoc = new XmlDocument();

   // attempt to load the request as an xml document
  requestDoc.Load(waveRunnerMessage);
//######### ERROR HERE #######
}

Here is the contents of Tester.xml

<travelmessage versionid="1.4">
  <control language="NL" test="nee">
    <sendersessionid>O042678044</sendersessionid>
    <receiversessionid />
    <date>2006-10-03</date>
    <time>08:37</time>
    <messagesequence />
    <senderid>949</senderid>
    <receiverid />
    <employeeid />
    <requestid>AvailabilityRequest</requestid>
    <responseid />
  </control>
  <trequest>
    <availabilityrequest>
      <packagedetails>
        <packageid>930-3G</packageid>
        <numberofadults>2</numberofadults>
        <numberofchildren>0</numberofchildren>
        <numberofbabies>0</numberofbabies>
        <departuredate>2006-10-07</departuredate>
      </packagedetails>
    </availabilityrequest>
  </trequest>
</travelmessage>

As the error message pointed out, your XML is missing the root element.  Try adding the root element as shown below and see if the error goes away:

<root><travelmessage versionid="1.4">
  <control language="NL" test="nee">
    <sendersessionid>O042678044</sendersessionid>
    <receiversessionid />
    <date>2006-10-03</date>
    <time>08:37</time>
    <messagesequence />
    <senderid>949</senderid>
    <receiverid />
    <employeeid />
    <requestid>AvailabilityRequest</requestid>
    <responseid />
  </control>
  <trequest>
    <availabilityrequest>
      <packagedetails>
        <packageid>930-3G</packageid>
        <numberofadults>2</numberofadults>
        <numberofchildren>0</numberofchildren>
        <numberofbabies>0</numberofbabies>
        <departuredate>2006-10-07</departuredate>
      </packagedetails>
    </availabilityrequest>
  </trequest>
</travelmessage></root>

It Still gives me the same message. The xml is well formed and it has a root <travelmessage> element. I tried that suggstion but still get that problem

Try adding the following at the beginning of your XML file and see if the error goes away.

<?xml version="1.0" ?>

Tried that, still gives me the same error, this is a nightmare! Thanks for the help Ronald.

According to the following link:

http://www.thescripts.com/forum/thread176050.html

You have to rewind the stream.

public static string Process(Stream waveRunnerMessage)
{
   XmlDocument requestDoc = new XmlDocument();
   XmlDocument responseDoc = new XmlDocument();

   // attempt to load the request as an xml document

  wareRunnerMessage.Position = 0;
  requestDoc.Load(waveRunnerMessage);
//######### ERROR HERE #######
}

Oh by the way, thank you so much Ronald for that, I have been at this for days.

There is no problem with the input file.  The stream position set to the end of the stream.  There's no root element because the XmlDocument.Load function thinks the stream has a 0 byte length.  The fix is to simply set the position to 0:

 

StreamXml.Position = 0;

bit 0 will solve the problem