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Web Service Design Question
Message
De
12/03/2008 17:14:26
 
Information générale
Forum:
ASP.NET
Catégorie:
Web Services
Divers
Thread ID:
01299582
Message ID:
01301574
Vues:
15
>I figured it out. I rewrote the RunQuery code to return a DataSet.

Yep. =0)

~~Bonnie



>
>
>
>>Ok, I'm still confused on something here.
>>
>>I wrote a method called RunQuery that accepts a query string and returns a DataReader. I then wrote a method
>>called Login which returns the user's Guid as a string.
>>
>>Now I'm working on a GetUser method in which I want to return the user's record as XML:
>>
>>
>>        public void GetUser(string sGuid, ref string sMessage)
>>        {
>>
>>            // Clear the message string
>>            sMessage = "";
>>
>>            // Define variables
>>            SqlDataReader oReader = null;
>>            string sQuery = "select * from appusers where usr_guid = '" + sGuid + "'";
>>            string sRetVal = "";
>>
>>            // Call the method to run the query
>>            oReader = RunQuery(sQuery, ref sMessage);
>>
>>            // If any data was returned and no error occured...
>>            if (oReader != null && oReader.HasRows && sMessage == "")
>>            {
>>
>>                // Convert the data to XML
>>                                                        // <----- What goes here?
>>
>>                // Close the reader
>>                oReader.Close();
>>
>>            }
>>
>>        }
>>
>>
>>
>>
>>
>>
>>
>>
>>>>>Seriously, all our web service methods have a "ref string Message" parameter that will contain any error messages that the server-side stuff may have encountered.
>>>>
>>>>That was the reason I thought of returning an object. An object would contain any amount of data. But I can
>>>>see how it would be cumbersome to return an object.

>>>
>>>There are other issues with returning objects ... they may not be recognized by other platforms that may use the Web Service. A few of our customers access some web services from other platforms and we wanted to be sure to maintain platform independence. That's why we return data as a string that's simply the XML representation of the data (MyDataSet.GetXml(), as I already mentioned).
>>>
>>>~~Bonnie
Bonnie Berent DeWitt
NET/C# MVP since 2003

http://geek-goddess-bonnie.blogspot.com
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