Ok...I tested it again and don't need the XmlInclude at all. I will have to
go back to the drawing board on that attribute and figure it out all over
again. I am able to pass objects and even objects that include objects - if
those objects are all made up of serializable types - between web services
and asp.net.
DalePres
"Sami Vaaraniemi" <samivanospam@pleasejippii.fi> wrote in message
news:cu4mt0$jur$1@phys-news1.kolumbus.fi...[color=blue]
>
> The XmlInclude attribute is only needed for polymorphic return or
> parameter types - which is not the case here.
>
> To return a single NewsItem DalePres's sample code is fine except that the
> XmlInclude attribute is not needed.
>
> If you want to return multiple NewsItems, don't return an ArrayList, it is
> not supported. Return an array of custom objects instead:
>
> [WebMethod]
> public NewsItem[] CoverNews(string Sport)
> {
> ArrayList NewsItems = new ArrayList();
>
> // populate ArrayList with NewsItems here...
>
> return (NewsItem[])NewsItems.ToArray(typeof(NewsItem));
> }
>
> Regards,
> Sami
>
> "DalePres" <don-t-spa-m-me@lea-ve-me-a-lone--.com> wrote in message
> news:%23tNABL$CFHA.2676@TK2MSFTNGP12.phx.gbl...[color=green]
>> To return a NewsItem from your webservice, add the [XMLInclude] attribute
>> before the declaration of the NewsItem class.
>>
>> I think what may be confusing you about the public default constructor is
>> this: If you create a constructor with parameters, then no default
>> construct will be automatically created; you will have to manually create
>> one. If you do not create any constructor, then a default will be
>> created automatically. That tidbit may or may not have anything to do
>> with your problem though.
>>
>> Here's how I implemented a very simple web service returning a NewsItem
>> to a web page:
>>
>> First, the NewsItem class that I created as a public class in the
>> WebService namespace and file but not within the webservice class:
>>
>> public class NewsItem
>>
>> {
>>
>> private int _NewsId;
>>
>> private string _NewsTitle;
>>
>> private string _NewsDate;
>>
>> private string _PicName;
>>
>> private string _NewsSummary;
>>
>> public NewsItem()
>>
>> {
>>
>> }
>>
>> public int NewsId
>>
>> {
>>
>> get{return _NewsId;}
>>
>> set{_NewsId=value;}
>>
>> }
>>
>> public string NewsTitle
>>
>> {
>>
>> get{return _NewsTitle;}
>>
>> set{_NewsTitle=value;}
>>
>> }
>>
>> public string NewsDate
>>
>> {
>>
>> get{return _NewsDate;}
>>
>> set{_NewsDate = value;}
>>
>> }
>>
>> public string PicName
>>
>> {
>>
>> get{return _PicName;}
>>
>> set{_PicName = value;}
>>
>> }
>>
>> public string NewsSummary
>>
>> {
>>
>> get{return _NewsSummary;}
>>
>> set{_NewsSummary = value;}
>>
>> }
>>
>> }
>>
>>
>>
>> Next, I added these lines to the Page_Load method of an otherwise blank
>> webform:
>>
>> NewsService.Service1 news = new WebApplication2.NewsService.Service1();
>>
>> news.Credentials = System.Net.CredentialCache.DefaultCredentials;
>>
>> news.NewsItem item = news.GetItem();
>>
>> Response.Write(item.NewsSummary);
>>
>>
>>
>> And then last, I created this WebMethod:
>>
>> [WebMethod]
>>
>> [XmlInclude(typeof(NewsItem))]
>>
>> public NewsItem GetItem()
>>
>> {
>>
>> NewsItem item = new NewsItem();
>>
>> item.NewsDate = "02/05/2005";
>>
>> item.NewsId = 1;
>>
>> item.NewsSummary = "No one was killed today.";
>>
>> item.NewsTitle = "Special Report!";
>>
>> item.PicName = "NewBornBaby.jpg";
>>
>> return item;
>>
>> }
>>
>>
>>
>> Now, when I run the project, the phrase "No one was killed today." is
>> displayed as expected. We have successfully returned a custom class
>> NewsItem from our web service. This is one method of doing so, where we
>> instantiate on the web service client (the asp.net web application) an
>> object NewsItem defined in the web service.
>>
>> Another way I successfully passed a NewsItem from a web service to my
>> webform involves the following changes:
>>
>>
>>
>> 1. Copy the NewsItem class from the web service file and paste it into
>> the aspx file, within the project namespace but outside of the webform
>> class. Now you have the NewsItem class available locally for the webform.
>>
>>
>>
>> 2. The third line of the code for the Page_Load above, remove the "news."
>> at the beginning. Now we want to instantiate the local copy of the
>> NewsItem class, rather than the copy at the web service.
>>
>>
>>
>> 3. In the project explorer, make sure you are showing all files and
>> browse to the Reference.cs file for your web service. Edit all
>> references to the word NewsItem to read YourNameSpace.NewsItem, except
>> for one reference to the word - the one that should be the last reference
>> and it starts with public class NewsItem. This reference is just below
>> an attribute similar to
>>
>> [System.Xml.Serialization.XmlTypeAttribute(Namespac e=http://tempuri.org/)]
>>
>> though yours may have a different namespace.
>>
>> 4. Now if you compile your app and run it again, you will instantiate a
>> NewsItem from your local copy of the class but it will still accept the
>> NewsItem returned by the web service and your web form will still display
>> the phrase "No one was killed today."
>>
>> All that is left is for you to flush out how to set the properties of the
>> NewsItems. Though I didn't do it in this example, I have used both these
>> methods in the past to create arrays of custom classes and successfully
>> pass them between a web service and ASP.Net. Remember that this behavior
>> does not follow the W3C guidelines for WebServices and clients other than
>> ASP.Net may not be able to consume your NewsItem web service.
>>
>> One last point. If you choose the second route, where you modify the
>> Reference.cs file, keep in mind that any time you update the web
>> reference in Visual Studio, the Reference.cs file is re-created and you
>> will have to make your changes to that file again.
>>
>> Hope this helps,
>>
>>
>>
>> DalePres
>>
>> MCAD, MCDBA, MCSE
>>
>>
>>
>> "Jose Fernandez" <pp@inder.co.cu> wrote in message
>> news:eT%23%23wQ8CFHA.2572@tk2msftngp13.phx.gbl...[color=darkred]
>>> Well...
>>> new problems...
>>>
>>> I created a News class.
>>> This is...
>>>
>>> public class NewsItem
>>> {
>>> private int _NewsId;
>>> private string _NewsTitle;
>>> private string _NewsDate;
>>> private string _PicName;
>>> private string _NewsSummary;
>>>
>>> public NewsItem()
>>> {
>>> this._NewsId = NewsId;
>>> this._NewsTitle = NewsTitle;
>>> this._PicName = PicName;
>>> this._NewsSummary= NewsSummary;
>>> }
>>> public NewsItem(int ID, string Title, string PicName, string Summary)
>>> {
>>> this._NewsId = ID;
>>> this._NewsTitle = Title;
>>> this._PicName = PicName;
>>> this._NewsSummary= Summary;
>>> }
>>>
>>> public int NewsId
>>> {
>>> get{return _NewsId;}
>>> set{_NewsId=value;}
>>> }
>>>
>>> public string NewsTitle
>>> {
>>> get{return _NewsTitle;}
>>> set{_NewsTitle=value;}
>>> }
>>>
>>> public string NewsDate
>>> {
>>> get{return _NewsDate;}
>>> set{_NewsDate = value;}
>>> }
>>> public string PicName
>>> {
>>> get{return _PicName;}
>>> set{_PicName = value;}
>>> }
>>> public string NewsSummary
>>> {
>>> get{return _NewsSummary;}
>>> set{_NewsSummary = value;}
>>> }
>>> }
>>>
>>> And changed the webmethod like this.
>>>
>>> [WebMethod]
>>> public ArrayList CoverNews(string Sport)
>>> {
>>> ArrayList NewsItems = new ArrayList();
>>> SqlConnection myConnection = new SqlConnection("Password=XXX;User
>>> ID=XXX;Initial Catalog=XXX;Data Source=XXX");
>>> SqlCommand myCommand = new SqlCommand ("SELECT TOP 1 PERCENT
>>> News.idNews, News.newsTitle, News.newsSummary, News.newsDate,
>>> NewsPictures.picName, News.SportCat" +
>>> " FROM News INNER JOIN NewsPictures ON News.idPic =
>>> NewsPictures.idPic" +
>>> " WHERE (News.SportCat = 'Sport') ORDER BY News.idNews DESC",
>>> myConnection);
>>> try
>>> {
>>> myCommand.Connection.Open();
>>> SqlDataReader dr = myCommand.ExecuteReader();
>>> while(dr.Read())
>>> {
>>> //NewsItems.Add(new
>>> NewsItem((int)dr["idNews"],dr["NewsTitle"].ToString(),dr["PicName"].ToSt
>>> ring(),dr["NewsSummary"].ToString()));
>>> NewsItems.Add(new NewsItem());
>>> }
>>> }
>>> catch(Exception ex)
>>> {
>>> ex.ToString();
>>> }
>>> finally
>>> {
>>> myCommand.Connection.Close();
>>> }
>>> return NewsItems;
>>> }
>>>
>>> I did this following the instructions of the link on microsoft. I
>>> created a Class and made an array of it....
>>> It compiled fine, when I press F5 (Visual Studio) i get tha page that
>>> shows the webservice details and I can see the Method, when I invoke it,
>>> i got an empty XML. Just the header...
>>> "<?xml version="1.0" encoding="utf-8" ?>
>>> <ArrayOfAnyType xmlns:xsd="http://www.w3.org/2001/XMLSchema"
>>> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>>> xmlns="http://tempuri.org/" /> "
>>>
>>> BUT on the microsoft page says
>>> "Class and struct types with public fields or properties. The public
>>> properties and fields are serialized. Classes must have a default
>>> constructor that does not accept any parameters."
>>>
>>> Default constructor? How can I assing values to my class without
>>> parameters??
>>>
>>> I know that with a Dataset... I solve it, but I don't like Datasets for
>>> small pieces of data. I'm just retrieving 1 news.
>>>
>>> Thanks[/color][/color]
>
>[/color]
