Question

We could really use some help with a hashset output question. We have the HashSet web method working perfectly with HashSet except for one thing. The output is a webservice and looks like this:

<?xml version="1.0" encoding="utf-8" ?>
<ArrayOfString xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 'xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://localhost/webservices">
    <string>201210XXXX</string>
    <string>201211XXXX</string>
</ArrayOfString>

That’s perfect except the customer requested the output of the lines of strings be lines of “TN” and “/TN” tags instead of the string tags. Figured this should be pretty easy and added my extra class but I cannot figure out how to do this

HashSet<TN>;

We built the webmethod

[WebMethod]
public HashSet<string> GetFoneLines()
{
    HashSet<string> hs = new HashSet<string>();

    DataTable dt = new dal().GetPhoneLines();

    foreach (DataRow dr in dt.Rows)
    {
        hs.Add(dr[0].ToString());    
    }

    return hs;
}

and tried to extend the string class. Learning String is sealed, we just attempted to create our own class

public class TN
{
    public string tnumber;
}

This must be simple but after 48 hours of pounding out code I cant see how to create a Hash of TN’s instead of a Hash of strings.

Answer 1

Try to decorate your class with custom XML serialization attributes like so:

public class TN
{
    [XmlElement(ElementName="TN")]
    public string tnumber;

}

See MSDN.