passing objects via Binding from xaml to Viewmodel o

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Hi ,

I need to pass object from xaml(view ) to view model using binding

eg

XML

<Grid x:Name="LayoutRoot" Background="White">
<telerik:RadGridView Height="400" Width="400" AutoGenerateColumns="True" x:Name="radObject" />
    </Grid>

I need to pass this RadGridInstance to viewmodel using binding any idea

Thanks in Advance

Posted 24-Mar-11 23:12pm

Gopinath Sugumar

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Espen Harlinn · Answer 1 · 2011-03-24T23:56:00

Solution 1

Why you would want to pass the GridView seems a bit odd, is it possible that you are looking for:
http://www.telerik.com/help/silverlight/telerik.windows.data-telerik.windows.controls.datacontrol-selecteditem.html[^]
or
http://www.telerik.com/help/silverlight/telerik.windows.data-telerik.windows.controls.datacontrol-currentitem.html[^]
or
http://www.telerik.com/help/silverlight/telerik.windows.data-telerik.windows.controls.datacontrol-selecteditems.html[^]

Those properties are usually what you would like to provide bindings for in a view model - apart from
http://www.telerik.com/help/silverlight/telerik.windows.data-telerik.windows.controls.datacontrol-items.html[^]
or
http://www.telerik.com/help/silverlight/telerik.windows.data-telerik.windows.controls.datacontrol-itemssource.html[^] - one of them is usually the simplest way to bind the actual data, while those above allows you to react to user input in a sensible manner.

Regards
Espen Harlinn

Posted 24-Mar-11 23:56pm

Espen Harlinn

Comments

Gopinath Sugumar 25-Mar-11 6:38am

Hi thanks ,
but me need to call some methods like
radObject.ScrollIntoView(radObject.SelectedItem);
in viewmodel ,i dont want to write code on codebehin file

Espen Harlinn 27-Mar-11 10:38am

If I remember correctly - binding to currentitem allows you to solve this :) - I havent used the telerik grid control for SilverLight since other alternatives became available ...

Gopinath Sugumar 28-Mar-11 1:56am

Thanks,
But binding to currentitem will give us the single current item object(ex employee object from employee list) not Gridview Instance

Espen Harlinn 28-Mar-11 6:50am

I'm trying to help you find, INMO, a "better" solution. CurrentItem will become visible through binding when set in the View Model - assuming that you have implemented change notification on the property you bind to. The general idea is that the View Model does not know anything about the actual control used to implment the UI - it implments a data model for the UI functionality, not a full datamodel for the solution. The view model also contains data members that drives the UI - like a collection for SelectedItems and a property for CurrentItem.

Gopinath Sugumar 29-Mar-11 0:09am

yes Espen ur right ,but if i need to call a method which belongs to control like
radObject.ScrollIntoView(radObject.SelectedItem);
What i need to do,I can use code behind but when the selected item is get changed i need to call
this ,so it means i need to place this in selecteditem changed event in the code behind is it right ?
But without using code behind is any way .....(ie handling methods of object in view model)

Sergey Alexandrovich Kryukov 30-Mar-11 15:30pm

Wealth of useful material and good arguments. (I'm not sure OP is getting it.) My 5 for sure.
--SA

Espen Harlinn 30-Mar-11 15:35pm

Thanks SAKryukov! It's been a while since I used the telerik grid for silverlight - but I'm fairly sure that he could accomplish what he wants by binding the CurrentItem property and set the bound element in his view model to the element he wants to make visible - obviously this can be the same element that is bound to SelectedItem :)