I want to change the position  of two rows 

the itemsource is binding to Columns,   item is currentItem,

the code :

int index = Columns.IndexOf(item) - 1;

Columns.Remove(item);
Columns.Insert(index, item);

 

now  i must reset the source  and the UI refresh

Columns = Columns.ToList().OrderBy(t => t.column_order) as ObservableCollection<Column>

 

Is any way  tochange the position by not refresh ui?

Hello Rui,

Provided your Columns collection implements the INotifyCollectionChanged interface, any changes made to it should be reflected in RadGridView. I'm attaching a sample project in which, using the code you provided, I'm successfully able to swap the items and notify RadGridView about it.

Could you please have a look at the attached project and let me know whether I've missed something important? If that is the case, please let me know and I will gladly assist you further.

Regards,
Dilyan Traykov
Telerik by Progress

Thanks for your answer

I'm sorry i missed an important  thing  

i group the gridview by ColumnGroupDescriptor

<telerik:RadGridView.GroupDescriptors>
                <telerik:ColumnGroupDescriptor x:Name="columnGroupDescriptor" Column="{Binding Columns[\ContactTitleWithConverter\], ElementName=ESColumnGrid}"  SortDirection="Ascending"/>
</telerik:RadGridView.GroupDescriptors>

in your demo code i change a row cell data as same as another row  and drag the column header to group 

and the issue is also exist

Is there any solution for this

I find the solution  use ColumnGroupDescriptor's ResumeNotifications mothed

columnGroupDescriptor.ResumeNotifications();

thank you very much!

ResumeNotifications  can  change the two item's index  but  the GridView is scroll to top  

how to let the scrollbar keep the position

Hello,

Could you please let me know how I need to modify the project from my previous post as well as what action steps I should take in order to reproduce the issue you've described as I am currently unable to do so?

Thank you in advance for your cooperation on the matter.

Regards,
Dilyan Traykov
Telerik by Progress