Hi,
I want to know, how can I update my data in a RadGrid smooth when my bound datasource has changed (only the values behind have changed no entries have been added or removed).
I use the PropertyChanged event or I call Rebind() and this updates the data, but the problem is,
that the selected item and the scroll postion gets lost. The grid jumps to the top to the first entry.
I can select the current Item and call ScrollIntoView(), but this doesn´t satisfy me.
ScrollIntoView() just scrolls until the item is visible, but before it could be in the middle of the screen, so when I update I have a jump of some rows and the selected item is on the top now.
What is the recommended way to do this?
Is there a way to silent update the data or read and set exacly the scroll position?
I hope I expressed me clear...
Regards,
Johnny
I want to know, how can I update my data in a RadGrid smooth when my bound datasource has changed (only the values behind have changed no entries have been added or removed).
I use the PropertyChanged event or I call Rebind() and this updates the data, but the problem is,
that the selected item and the scroll postion gets lost. The grid jumps to the top to the first entry.
I can select the current Item and call ScrollIntoView(), but this doesn´t satisfy me.
ScrollIntoView() just scrolls until the item is visible, but before it could be in the middle of the screen, so when I update I have a jump of some rows and the selected item is on the top now.
What is the recommended way to do this?
Is there a way to silent update the data or read and set exacly the scroll position?
I hope I expressed me clear...
Regards,
Johnny
4 Answers, 1 is accepted
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Hello Johnny,
Vlad
the Telerik team
You do not need to call Rebind() in case of PropertyChanged since cell/columns Bindings will respond automatically.
Best wishes,Vlad
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Johnny
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answered on 12 Jul 2010, 08:54 AM
Hi,
I don´t call both,normally I use the ProprtyChanged event, i just tried Rebind(9 I it works different.
But the problem remains the samewith ProprtyChanged, my scroll position gets lost.
Or what I´m doing wrong?
I don´t call both,normally I use the ProprtyChanged event, i just tried Rebind(9 I it works different.
But the problem remains the samewith ProprtyChanged, my scroll position gets lost.
Or what I´m doing wrong?
0
Hi Johnny,
Vlad
the Telerik team
I've just tried our latest official version with INotifyPropertyChanged however everything worked as expected. You can check the attached example project for reference. Scroll the grid to bottom, click the button and the grid will not scroll.
Greetings,Vlad
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Johnny
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answered on 12 Jul 2010, 01:18 PM
Hi,
thanks for the sample this helped solving my problem. I know now how it should work...
Before I bounded a ObservableCollection<MyObject> to the grid and raised the OnPropertyChanged for the bounded collection and than my effect happened. (I think the complete datasource got rebounded by the grid, I thought, it just updates the data).
When I put the OnPropertyChanged in each property of the MyObject like in the sample, it works like it should.
->But I have several grids and e.g. a overview grid with a dozend columns which could change. So its a little bit work.....
thanks for the sample this helped solving my problem. I know now how it should work...
Before I bounded a ObservableCollection<MyObject> to the grid and raised the OnPropertyChanged for the bounded collection and than my effect happened. (I think the complete datasource got rebounded by the grid, I thought, it just updates the data).
When I put the OnPropertyChanged in each property of the MyObject like in the sample, it works like it should.
->But I have several grids and e.g. a overview grid with a dozend columns which could change. So its a little bit work.....