[Solved] Using the DataPager with Observable Collections

[Scott]

Folks,

I see lots of example on using the DataPager with a DomainDataSource, but need to set these programatically against an Observable Collection derived from a custom class.

I am using Q2 2009 and Blend 3.

Please advise.

[Vlad]

Hi Scott,

I'm not sure about ObservableCollection<> (you may need to implement IPagedCollectionView) however you can use directly PagedCollectionView instead. Here is an example:

XAML

<UserControl x:Class="SilverlightApplication2.Page"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"
    xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView">
    <Grid x:Name="LayoutRoot" Background="White">
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="30" />
        </Grid.RowDefinitions>
        <telerik:RadGridView x:Name="RadGridView1" />
        <data:DataPager x:Name="DataPager1" PageSize="10" Grid.Row="1" />
    </Grid>
</UserControl>

C#

namespace SilverlightApplication2
{
    public partial class Page : UserControl
    {
        public Page()
        {
            InitializeComponent();

            var data = new PagedCollectionView(from i in Enumerable.Range(0, 100)
                                       select new MyObject()
                                       {
                                           ID = i,
                                           Name = String.Format("Name{0}", i)
                                       }, false ,false);


            RadGridView1.ItemsSource = DataPager1.Source = data;
        }
    }

    public class MyObject
    {
        public int ID { get; set; }
        public string Name { get; set; }
    }
}

Kind regards,
Vlad
the Telerik team

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[Scott]

NOTE: For folks wanting to use the PagedCollectionView you need a reference to System.Windows.Data typically found in the Silverlight SDK Libraries folder.

Thanks Vlad.

[Tushar]

Hi,

Binding PagedCollectionView to the RadGridView limits the filter to the current PageSize of the DataPager. So if you set PageSize to 5, filter displays only 5 records and not all the values for that column in the Collection.

How do i achieve serverside filtering of records on the entire collection and not just the PageSize on the datapager.

Thanks,

Tushar

[Vlad]

Hello Tushar,

Such demo can be found here:
http://demos.telerik.com/silverlight/#GridView/DomainDataSource

Regards,
Vlad
the Telerik team

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[Justin Brown]

Hi,

Are there any plans to enable client-side filtering when using the DataPager with the RadGridView? This is a highly desirable feature for my organisation.

If not, can you offer any guidance on how it may be easily implemented? It seems that it may be quite easy to capture the filter event and then filter the paged collection.

Kind regards,
Justin

[Vlad]

Hi Justin,

Generally the grid will filter by default completely on the client however only current page items. On posted demo you can find how to filter server-side.

Sincerely yours,
Vlad
the Telerik team

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[Dharmin Parekh]

What if custom filtering needs to be implemented on the server without using the domain data source control. Just like a PagedCollectionView object.

I have implemented some filtering on the server, but it is not extensive enough to support all the filtering options provided by the grid filter and i don't want to end up creating my own extensive filtering class.

Is there a sample that I can refer to, or am I missing something.

Thank you
Dharmin

[Dharmin Parekh]

Hi,


What if custom filtering needs to be implemented on the server without using the domain data source control. Just like a PagedCollectionView object.

I have implemented some filtering on the server, but it is not extensive enough to support all the filtering options provided by the grid filter and i don't want to end up creating my own extensive filtering class.

Is there a sample that I can refer to, or am I missing something.

Thank you
Dharmin

[Vlad]

Hello,

Finally you will implement something like WCF Ria services :). It will be better if you use them if you want advanced filtering.

Greetings,
Vlad
the Telerik team

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