ScrollIntoView issu

[Kennet]

Here is the senario.

I have a ObservableCollection with let say 100 items.  I have clicked on and selected row # 60.  Then I delete row 50 to 100, and instantly add 50 new rows (I have now 100 items again. The grid "auto updates" as the type of collection, But I loose my selection.

I can get what row that was selected before my update, and select it agan. But now that row is at the top of the grid. I want the selection to be at the same place as before update.

How can I scroll the grid to that same position?

[Pavel Pavlov]

Hello Kennet,

If the requirement is to return to exactly the same position and you have equal number of items , you may try the following apporach :

befor the update - remember the current scroll position :

using Telerik.Windows.Controls;
...
...
...

 GridViewScrollViewer scroller = this.GridView.ChildrenOfType<GridViewScrollViewer>()[0];
            double cachedVerticalOffset = scroller.VerticalOffset;

after the data update - restore the scroll position to the cached one :

scroller.ScrollToVerticalOffset(cachedScrollOffset);

Greetings,
Pavel Pavlov
the Telerik team

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[Kennet]

Thanks Pavel,

But "ChildrenOfType" give me an error:

'Telerik.Windows.Controls.RadGridView' does not contain a definition for 'ChildrenOfType' and no extension method 'ChildrenOfType' accepting a first argument of type 'Telerik.Windows.Controls.RadGridView' could be found (are you missing a using directive or an assembly reference?)

I have version 2009.3.1219.35

[Vlad]

Hello Kennet,

ChildrenOfType is extension method available in Telerik.Windows.Controls namespace - you need to add:

using Telerik.Windows.Controls;

Greetings,
Vlad
the Telerik team

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