SelectedItem ?

[Jon]

When a user selected a current Item or an Item comes into view. How can I call an event to populate a gridview.

For example.. If a Item for John Doe becomes into view or is the selected Caroisel Item - I'd like to make a DB call to grab a dataset of his addresses.

How can I wire up an event to the selected Carousel Item and bind the dataset to the RadGridView.

Thanks again for all your help!!

[Hristo Deshev]

Hello Jon,

The best approach to tackling this scenario is to handle the SelectionChanged event. In the event args you will get a list of the records added to the selection -- usually a single record. Once you have the record, you can obtain its associated data item, and use the object to retrieve related data from the DB. Here is some code that gets the associated Message object, and pops up a message box with its Subject property value:

private void RadCarousel1_SelectionChanged(object sender, Telerik.Windows.Controls.SelectionChangeEventArgs e)
{
    if (e.AddedRecords.Count > 0)
    {
        var selectedRecord = (DataRecord) e.AddedRecords[0];
        var selectedMessage = (Message) selectedRecord.Data;
        MessageBox.Show(selectedMessage.Subject);
    }

}

I am attaching a sample project with full source code for your reference.

All the best,
Hristo Deshev
the Telerik team

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[FRANCE GUIMONT]

OK, so a mouse click raises the SelectionChanged event, but clicking the scroll bar up or down, or using the keyboard (cursor left or right) to change the item that is into view does not raise that event.  I'd like to be able to bind the item that's in view, so that I can display details, am I missing something, is is there no such property??

Regards

[Milan]

Hi FRANCE GUIMONT,

Currently there is no option that allows the selected item to be bound to the item in view and vice versa but there is a workaround:

private void RadCarousel1_Loaded(object sender, RoutedEventArgs e)
{
    this.panel = this.RadCarousel1.FindCarouselPanel();
    this.panel.IsAnimatingChanged += new RoutedEventHandler(panel_IsAnimatingChanged);
}

void panel_IsAnimatingChanged(object sender, RoutedEventArgs e)
{
    if (!this.panel.IsAnimating)
    {
        var record = ((CarouselItem)this.panel.TopContainer).Record;
        this.RadCarousel1.SelectedRecord = record;
    }
}

Just subscribe to the IsAnimatingChanged event and when the property is false (the panel has finished an animation) just synchronize the selected record.
Unfortunately the IsAnimating property and event are available in our latest releases (Q2 2009, or Q1 2009). Is it possible to upgade your binaries to a more recent version?

Sincerely yours,
Milan
the Telerik team

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[FRANCE GUIMONT]

As a matter of fact, I upgraded the controls last week!  Thanks for the work around, I am now able to update the details based on the carousel item that is in view.

[FRANCE GUIMONT]

With the release of 2009 Q3, this workaround no longer works.  The CarouselItem object no longer exposes a Record property, and the RadCarousel object no longer exposes a SelectedRecord property.  The following event handler for IsAnimatingChanged works:

 

void panel_IsAnimatingChanged(object sender, RoutedEventArgs e)
{
    if (!this.panel.IsAnimating)
    {
        myRadCarousel.SelectedItem = ((CarouselItem)this.panel.TopContainer).Item as MyDataType;
    }
}

 

 

 

[Milan]

Hello FRANCE GUIMONT,

This is indeed the correct rework of the code. RadCarousel no longer works with DataRecord but with data items instead which is more natural and easy.

SelectedItem, CurrentITem, and SelectedItems should now be used instead of the old SelectedRecord, CurrentRecord, and SelectedRecords.

Sincerely yours,
Milan
the Telerik team

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[David Lino]

How can I find out the selected item in a RadCarouselPanel hosted in a ScrollViewer?

Thanks

[Milan]

Hello David Lino,

RadCarouselPanel does not support selection you can use the TopContainer property to get the container that is in the middle of the carousel.

Alternatively you can use RadCarousel which is a full-blown data control and supports selection among other things.

Sincerely yours,
Milan
the Telerik team

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