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Using LINQ to locate Item in GridView

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Raymond
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Raymond asked on 28 Apr 2014, 09:32 PM
I am using the following to locate an Item in the grid and select it;
For Each item As AreaView In gvArea.Items
    If (item.AreaId = iAreaId) Then
        gvArea.SelectedItem = item
        gvArea.ScrollIntoView(item)
        Exit For
    End If
Next

However I would prefer to use something like;

Dim item As AreaView = gvArea.Items.Where(Function(f) f.AreaId = iAreaId)
gvArea.SelectedItem = item
gvArea.ScrollIntoView(item)

I have tried the above using "gvArea.Items", "gvArea.ItemsSource" and "gvArea.DataContext" with no luck.

Thanks in advance...

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Boris
Telerik team
answered on 30 Apr 2014, 02:28 PM
Hello Raymond,

You can use a lambda expression to traverse the ItemsSource collection of the GridView. Please keep in mind that you will need to cast the collection to the type of the property which provides it with the data.

Area item = (this.xAreasGridView.ItemsSource as ObservableCollection<Area>).FirstOrDefault(f => f.Id == iAreaId);
 
            if (item != null)
            {
                this.xAreasGridView.SelectedItem = item;
                this.xAreasGridView.ScrollIntoView(item);
            }

In this case I have a ObservableCollcetion<Area> Areas property in the ViewModel that is bound to the ItemsSource property of the GridView.

I hope this helps.

Regards,
Boris Penev
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Raymond
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answered on 04 May 2014, 11:27 PM
Hi Boris,

Thanks for getting back to me on this.

I realised however that since my GridView is bound to an ObservableCollection I can use;

Dim item As AreaView = colAreas.Where(Function(f) f.AreaId = iAreaId)
gvArea.SelectedItem = item
gvArea.ScrollIntoView(item)

Your solution of course would also work.

Thanks for your help...
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Raymond
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answered on 15 May 2014, 03:50 AM
Ho Boris,

Just found an instance in my code where your solution is applicable - works a treat :)

Thanks Ray
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Raymond
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