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[Solved] Sorting feature is gone? (2010 Q3 sp1 + Ria Service)

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GridView

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answered on 24 Feb 2011, 09:57 PM

Ah ha you were not using an EntitySet as your ItemsSource. You are using the DomainDataSource.
Personally I never much cared for it. But you are right It does appear that Sorting is broken when a DomainDataSource is used as you ItemsSource. Terlerik needs to check into it (Hint, Hint).
As a work around I use the MVVM pattern. Column sorting works just fine(however it is not server side sorting).
Sorry I couldnt be more help. In the Example Below you could try using the new Rad..CollectionView... thingy (It looks very promising ro MVVM) Also did you know that the RadGridView has its own IsBusy property you can bind to?

public class MyViewModel:INotifyPropertyChanged
    {
        TestDomainContext ctx;

        public MyViewModel()
        {
            ctx = new TestDomainContext();
            ctx.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(IsBusyPropertyChanged);
            var q = ctx.GetContactsQuery();
            ctx.Load(q);
        }

        public EntitySet<Contact> Contacts
        {
            get
            {
                return ctx.Contacts;
            }
        }

       public bool IsBusy
        {
            get
            {
                return DataContext.IsLoading || DataContext.IsSubmitting;
            }
        }

protected void IsBusyPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            if (e.PropertyName == "IsLoading" || e.PropertyName == "IsSubmitting")
            {
                OnPropertyChanged("IsBusy");
            }
        }

protected void OnPropertyChanged(string prop)
        {

                if (PropertyChanged != null)
                    PropertyChanged(this, new PropertyChangedEventArgs(prop));
         }
    }
-------------------------------------------------------------------------------------------------
---------------In your Page-------------------------------------------------------
<telerik:RadGridView AutoGenerateColumns="False"
                         Grid.Row="1"
                         IsBusy="{Binding IsBusy}"
                         ItemsSource="{Binding Contacts}" CanUserFreezeColumns="False" CanUserResizeColumns="True" HorizontalAlignment="Stretch" IsFilteringAllowed="True" IsReadOnly="True" Name="gv" RowHeight="30" RowIndicatorVisibility="Collapsed" SelectionMode="Extended" ShowGroupPanel="False" VerticalAlignment="Stretch" >
      <telerik:RadGridView.Columns>
        <telerik:GridViewDataColumn DataMemberBinding="{Binding Id}" Header="Id" />
        <telerik:GridViewDataColumn DataMemberBinding="{Binding FirstName}" Header="FirstName" />
        <telerik:GridViewDataColumn DataMemberBinding="{Binding LastName}" Header="LastName" />
      </telerik:RadGridView.Columns>
    </telerik:RadGridView>

--------------------------In your Page Code Behind
        private MyViewModel vm;

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {

            DataContext = vm = new MyViewModel();
        }

answered on 25 Feb 2011, 04:34 AM

Hi Tommy,

Thank you very much. You really helped me a lot. Also the IsBusy of RadGridView, I didn't know that before...

I tried your ViewModel code, it is working, but like you said, it is Client Side sorting,hum... maybe I need wait a new version of telerik silverlight control.

Thank you for your time, Tommy, I have a code snippets you may want to know, but of course you may already have it.

private void OnPropertyChanged<T>(Expression<Func<T>> exp)

{

//the cast will always succeed

MemberExpression memberExpression = (MemberExpression)exp.Body;

string propertyName = memberExpression.Member.Name;

if (PropertyChanged != null)

{

PropertyChanged(this, new PropertyChangedEventArgs(propertyName));

}

And for raise property change event, can use as this way,

private bool _HasValue = false;

public bool HasValue

{

get { return _HasValue; }

set { _HasValue = value; OnPropertyChanged(() => HasValue); }

}

It could avoid typing mistake for property name somehow.

Thank you again,
Bill

Accepted

answered on 25 Feb 2011, 04:30 PM

Thanks I had always thought there was a better way to pass around propertychanged info. I often think for such a static language we pass strings around alot.
I found the new thingy from Telerik: QueryableDomainServiceCollectionView<T>
In the View Model use this instead of the EntitySet<Contact> Contacts Property. (I have not tried it yet so I cant give any code) It may help with Server side sorting.

Also I didnt think of it before but you could go back to the non-MVVM way of doing things and try using RadDomainDataSource in xaml instead

I still prefer the MVVM pattern as it alows me to keep my UI "dumb" and keep the smarts in the VM where I can test it easier.

Check it out at.
http://blogs.telerik.com/blogs/posts/10-12-24/introducing_raddomaindatasource_for_silverlight.aspx