Solved

Can a C# webservice have a single DataSet parameter to handle a multi-relational XML/SOAP post?

Posted on 2007-11-21
15
365 Views
Last Modified: 2013-11-26
I have a webpage that is accessing a C#/.NET webservice.  It sends some XML that has several children (and the children have children as well).  For example:
<data>
   <first_child_of_data>
       <first_child_of_first_child>
       </first_child_of_first_child>
   </first_child_of_data>
   <second_child_of_data>
       <first_child_of_second_child>
       <first_child_of_second_child>
   </second_child_of_data>
</data>

My webservice has a single function.  My question is on the webservice side, do i have to make my function have a parameter for each tag(or row) or can I collect the entire XML/Soap post in one DataSet parameter, like so:
    [WebMethod]
    public string XMLtoString(DataSet datastream) { }
 
And if so, my main goal is to take that XML post and return a single string like:
string returnstring = <data><first_child_of_data><first_child_of_first_child></first_child_of_first_child></first_child_of_data>   <second_child_of_data><first_child_of_second_child><first_child_of_second_child></second_child_of_data></data>";

Besides the yes or no answer, some sample code for the string building would be much appreciated.

Thanks
0
Comment
Question by:RichardRiga
  • 7
  • 5
  • 3
15 Comments
 
LVL 96

Accepted Solution

by:
Bob Learned earned 500 total points
ID: 20328333
I would go the DataSet route, since it is serializable, and can bundle all the information that you need into a single entity.

Bob
0
 
LVL 21

Expert Comment

by:surajguptha
ID: 20328348
You could have just one dataset instead of calling it for every row.
The dataset has a WriteXML method to convert the dataset to string(XML)
0
 
LVL 1

Author Comment

by:RichardRiga
ID: 20328393
thanks for the quick responses, but can one of you show me *how* to do that?  I have the single DataSet parameter already and I'm using WriteXML but i'm messing something up.   thanks
0
Space-Age Communications Transitions to DevOps

ViaSat, a global provider of satellite and wireless communications, securely connects businesses, governments, and organizations to the Internet. Learn how ViaSat’s Network Solutions Engineer, drove the transition from a traditional network support to a DevOps-centric model.

 
LVL 21

Expert Comment

by:surajguptha
ID: 20328401
>>but i'm messing something up
More details would help :)
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 20328517
If you are trying to create a custom XML document (because DataSet.WriteXml doesn't cut it), then you could create an XmlDocument and use methods like CreateElement.

Example:

Create a New XML File Using XmlDocument
http://www.devx.com/tips/Tip/21168

Bob
0
 
LVL 1

Author Comment

by:RichardRiga
ID: 20328571
Below is my webmethod.  When I run the client I receive a series of numbers that have nothing to do with the data submitted.  It seems random but its the same numbers each time its run.  What I expect to see is all the tags and their values in a single string as posted originally.  Some extra info... if i use         return datastream.Tables.Count.ToString() I get a 0 as a return value.  I had thought that each of the children became tables of their own, but I guess not.

    [WebMethod]
    public string XMLtoString(DataSet datastream)
    {      
        string returnstring = "";
        byte[] arr;
       
        MemoryStream stream = new MemoryStream();      
        datastream.WriteXml(stream);
        arr = stream.ToArray();
       
        for (int ix = 0; ix < arr.Length; ix++)
        {
            returnstring += arr.GetValue(ix).ToString();
        }
         
        return returnstring;
  }
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 20328608
Are you saying that the incoming DataSet doesn't have any tables attached?

Bob
0
 
LVL 1

Author Comment

by:RichardRiga
ID: 20328712
Bob, right.

Say I submit the above sample XML via a SOAP post.  When it gets to the webmethod and i use the         return datastream.Tables.Count.ToString() i get a zero as a response.
0
 
LVL 1

Author Comment

by:RichardRiga
ID: 20328736
Learned one, hi.

I'm not trying to create a custom XML document.

I guess, in a nutshell, i'm trying to have my webmethod be able accept ANY xml/soap post then send back a string representation of it, tags and values.
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 20328805
Hmmm, I am trying to understand the value of this web method.  Are you trying to create a different representation for the incoming XML text?

Bob
0
 
LVL 1

Author Comment

by:RichardRiga
ID: 20328882
I am trying to send an XML/SOAP message to a webservice.  regardless of the number of children, grandchildren, etc, I'd like to have the webservice method accept it as a single DataSet parameter, then spit it back out as a string.
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 20328935
How are you constructing the DataSet to pass into the web method?  Since DataSet.Tables.Count = 0, it sounds like it is not working very well.

Bob
0
 
LVL 1

Author Comment

by:RichardRiga
ID: 20328989
What do you mean constructing?  I assumed that the XML post would come in as the DataSet.
0
 
LVL 1

Author Comment

by:RichardRiga
ID: 20329039
like:
=============================
==<data>                                       ==
==   <first_child_of_data>             ==
==      <first_child_of_first_child>  ==    
==       </first_child_of_first_child>==                                                    
==   </first_child_of_data>             ==                                                          
==</data>                                       ==                                                                      
==============================
                     ||
                     ||
             to webservice
                    ||
                    ||
============================================
== [WebMethod]                                                         ==
==public string XMLtoString(DataSet datastream) { } ==
============================================
                  ||
                  ||
         returns string
==
0
 
LVL 21

Expert Comment

by:surajguptha
ID: 20329134
You mean to say that you directly write the XML into the webservice rather than using a proxy?
You need not send it to the web service just to get a string. you could just use a function to convert it to string

0

Featured Post

Resolve Critical IT Incidents Fast

If your data, services or processes become compromised, your organization can suffer damage in just minutes and how fast you communicate during a major IT incident is everything. Learn how to immediately identify incidents & best practices to resolve them quickly and effectively.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article is for Object-Oriented Programming (OOP) beginners. An Interface contains declarations of events, indexers, methods and/or properties. Any class which implements the Interface should provide the concrete implementation for each Inter…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…

730 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question