How to link Datapager and gridview programmatically

[Kiran]

Hi

I am trying to come up with a composite control which includes GridView and Date pager something similar to asp.net grid. I have AllowPagination property. I am finding it difficult as to how link datapager and gridview control in the composite control.

I have seen the sample where it says Datapager Source="{Binding Items, ElementName=radGridView}" but how i can I do the same linking in code behind.

Regards
Kiran

[Vlad]

Hi,

 Here is an example:

 
pager.SetBinding(RadDataPager.SourceProperty, new Binding("Items") { Source = grid });

Kind regards,
Vlad
the Telerik team

[Kiran]

Hi

Though this works but partially when I add this line of code I can see the datapager is working with but Grid does not show anything do I need to set anything for the grid.

DataPager.SetBinding(TngDataPager.SourceProperty, new Binding("Items") { Source = GridView });

Thanks
Kiran

[Vlad]

Hello,

 Can you post how you've set ItemsSource for the grid?

Best wishes,
Vlad
the Telerik team

[Kiran]

Hi

This is how I am using ItemSource property and Allow Paging property. Things seems to work fine when I run the screen first time but if I try to set the Grid ItemSource again my composite control crashes is there anything I need to do to un-bind and re-bind.

This is how I am trying to set Item Source using code-behind and I get a crash here.

GridView8.ItemsSource =

 

TestData.GetDepartments();

 

#region Property: ItemsSource
/// <summary>
/// Items is the collection of data that is used to generate the content of this control.
/// </summary>
public Object ItemsSource
{
    get { return GetValue(ItemsSourceProperty); }
    set { SetValue(ItemsSourceProperty, value); }
}
public static readonly DependencyProperty ItemsSourceProperty =
    DependencyProperty.Register(
        "ItemsSource", typeof(Object), typeof(TngGridView),
        new FrameworkPropertyMetadata
        {
            PropertyChangedCallback = (obj, e) =>
            {
                (obj as TngGridView).UpdateItemsSource(e.NewValue);
            }
        });
private void UpdateItemsSource(Object sel)
{
    GridView.ItemsSource = sel;
}
#endregion

Allow Pagin Property is defined likr this.

#region Property: AllowPaging
private bool _allowpaging = false;
/// <summary>
/// Sets AllowPaging
/// </summary>
[DesignOnly(true)]
public bool AllowPaging
{
    get { return _allowpaging; }
    set
    {
        _allowpaging = value;
        if (_allowpaging)
        {
            DataPager.Visibility = Visibility.Visible;
            DataPager.SetBinding(TngDataPager.SourceProperty, new Binding("Items") { Source = GridView });
            GridView.SetBinding(TngGridView.ItemsSourceProperty, new Binding("PagedSource") { Source = DataPager });


        }
         }
}
#endregion

Regards
Kiran

[Pavel Pavlov]

Hello Kiran,

The proper way for things to work would be as follows :

Data goes to  Pager.Source

GridView takes ItemsSource from Pager.PagedSource.

When new data comes, you need to change the Pager.Source , not RadGridView.ItemsSource.
And what you do is :

private void UpdateItemsSource(Object sel)

{

    GridView.ItemsSource = sel;

}

Maybe you need to change the code to update the Pager.Source instead.

In case this does not do the trick , just send me yuor project and I will do the fixes necessary for you .


Sincerely yours,
Pavel Pavlov
the Telerik team