Passing XMLdocument to webservice method

Hello expert,

I have a webservice created using asp.net/C#. The method in the webservice takes one input parameter as type object.

From my asp.net web application , i am calling the web service and passing a XML document to the webmethod.

It is throwing a error.

Here is my web service code:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml;

namespace PCWebApplication
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            PCWebService.Service1 PCWS = new PCWebService.Service1();

            XmlDocument doc = new XmlDocument();
            doc.Load("C:\\Temp\\Test.xml");

            /// Call to web service:
            object result;
           
            result= (object) PCWS.ProcessXMLFile(doc);

            Response.Write((string) result);

        }
    }
}

---------------------------------------------------

Here is my calling code from asp.net web application:

 protected void Page_Load(object sender, EventArgs e)
        {
            PCWebService.Service1 PCWS = new PCWebService.Service1();

            XmlDocument doc = new XmlDocument();
            doc.Load("C:\\Temp\\Test.xml");

            /// Call to web service:
            object result;
           
            result= (object) PCWS.ProcessXMLFile(doc);

            Response.Write((string) result);

        }

------------------------------------------------------------
Error Message: The type System.Xml.XmlDocument may not be used in this context.

any help?

LVL 8
mani_saiAsked:
Who is Participating?
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.

mani_saiAuthor Commented:
Sorry here is my web service code:

using System;
using System.Data;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.ComponentModel;
using System.Xml;
using System.Text;
namespace PCWebService
{
/// <summary>
/// Summary description for Service1
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ToolboxItem(false)]
public class Service1 : System.Web.Services.WebService
{
[WebMethod]
public string HelloWorld()
{
return "Hello World";
}
[WebMethod]
public string ProcessXMLFile(object doc)
{
/// process doc as a local variable
///
// Get the root node so we can explore its children
XmlDocument newxml = new XmlDocument();
newxml = (XmlDocument) doc;
string stroutput = newxml.DocumentElement.FirstChild.InnerText;
// Store all the values of the elements in a string
//string allMyChildren = nodRoot.InnerText;
return stroutput;

}
 
}
}
0
MogalManicCommented:
This will NEVER work.  Only classes that are marked [Serializable] can be passed as parameters in a web service.  The XmlDocument class is NOT serializable.

Here is an article on how serialization works:
  http://www.15seconds.com/issue/020903.htm

Web services usually use SoapSerialization which is XML.  Your best bet is to pass the XML as a string and reload the XML on the server.  So your code would be something like this:
client:
            PCWebService.Service1 PCWS = new PCWebService.Service1();

            XmlDocument doc = new XmlDocument();
            doc.Load("C:\\Temp\\Test.xml");

            /// Call to web service:
            object result;
           
            result= (object) PCWS.ProcessXMLFile(doc.DocElement.OuterText);
server:


[WebMethod]
public string ProcessXMLFile(String doc)
{
/// process doc as a local variable
///
// Get the root node so we can explore its children
XmlDocument newxml = new XmlDocument();
newxml.LoadXml(doc);
string stroutput = newxml.DocumentElement.FirstChild.InnerText;
// Store all the values of the elements in a string
//string allMyChildren = nodRoot.InnerText;
return stroutput;
 
} 

Open in new window

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
mani_saiAuthor Commented:
Thanks
0
mani_saiAuthor Commented:
When you pass XML as string, is there a size limitation, if yes how much is the limit?
0
MogalManicCommented:
I don't think so.  The only limitation would be the total max length.  Currently the default max length is 4K.  If you want to increase that amount you need to include a HTTPRuntime element in your web config:
http://msdn.microsoft.com/en-us/library/e1f13641%28VS.71%29.aspx
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
WCF

From novice to tech pro — start learning today.