I have a Telerik GridView that I am using in MVVM mode. That is, I've not implemented event handlers in the code-behind, rather I've bound it to an ObservableCollection.  And I have two problems.

When I click on the "Click here to add new item" bar in the grid, the CollectionChanged event on the collection fires, with it's Action set to NotifyCollectionChangedAction.Add.  Which is what I would expect to happen.  Then after the handler returns, the new blank row appears at the top of the grid.

The first problem: it's the second cell that is selected, and actively editable, not the first.

How do I configure the editor to have the first cell selected?  It clearly can't be in the ViewModel - the observable collection doesn't have access to the grid - and shouldn't.  Is there something I can add to the XAML that would control which field is active, when editing?

(One thing that might be relevant - the first cell is only editable when adding a new record, it's read-only when editing an existing record.  The GridViewDataColumn has its IsReadOnlyBinding property bound to a property in the viewmodel that is true when editing an existing record.  So when editing an existing row, I want to start editing with the second cell, when adding a new a new row I want to start editing with the first.)

The second problem: updating the data.

The rows in the grid are bound to elements in the collection, and those elements implement INotifyPropertyChanged.  So when I am editing a record in the grid, after I leave each file, the propertyChanged event fires on the element.  In that, I can update the underlying data store - except that I don't want to.  I don't want to insert or update the record, after every field is changed, I want to do one insert or update when the row is complete. 

But I can't figure out what event would indicate that editing of the row is complete.  PropertyChanged is fired on the element as every field is changed, it doesn't tell me when the user is done editing a row.  And Collection changed is fired when a new element is added to the collection, it doesn't fire to tell me that one of the elements has changed.

So, how do folks usually handle this?

== addendum ==
For what it's worth, I've tried adding an AddingNewDataItem handler:
It's not helped.  The event fires, I can walk through the handler in the debugger, setting CurrentColumn as suggested, then the CollectionChanged event fires and I walk through that.  But when I'm done, the second column is still current.

Hi,

I'm in WPF and I would like to know if it's possible to change the style of my RadTabItems to have a style like this the enclosed pictiure. Of course, the colors of my Telerik theme need to be maintain.

Thank's

I have a Radgrid and Datapager which is bound as the code below, the item source is a linq to sql class, the class is queried and the results are converted into a pivot table and both the pager and grid’s source properties are set and the grid has Aggregate Results and sort descriptors added this works well. I have a refresh button on the page but I can’t work out how to clear the pager and grid when the user clicks the button. I have tried your sample code but get errors. Could you please advise on the correct method.

 

<telerik:RadGridView x:Name="AgedJobsListgrid" ShowGroupPanel="False" telerik:StyleManager.Theme="Office_Black" ShowColumnFooters="True" IsScrolling="False" IsTabStop="False" RowIndicatorVisibility="Collapsed" VerticalAlignment="Stretch"  DataContext="{Binding ElementName=radDataPager}" RowHeight="35" FontSize="14"></telerik:RadGridView>

            <telerik:RadDataPager x:Name="radDataPager" telerik:StyleManager.Theme="Office_Black"

                         PageSize="10"

                         DisplayMode="All"

                         IsTotalItemCountFixed="True" Source="{Binding AgedListClass}"  DataContext="{Binding ElementName=AgedJobsListgrid}" />

 

       ‘code used to clear the pager and grid which fails when setting the itemsource to nothing.

radDataPager.Source = Nothing

AgedJobsListgrid.GroupDescriptors.Clear()

        AgedJobsListgrid.ItemsSource = Nothing

        AgedJobsListgrid.Columns.Clear()

        AgedJobsListgrid.AutoGenerateColumns = True

 

I have created a UserControl which consists of the RadDocking control.  Within this I place the RadPaneGroups and subsequent RadPanes.  Each RadPane contains a View, to which a ViewModel is created.  The problem occurs when I place the upper most UserControl, with the RadDocking, in a tab.  The tabs are dynamically created very similar to your expample with RadTab.  Each time I switch tabs I see the Views being reinstantiated and in turn the ViewModel and Model.  When I remove the upper most UserControl, with the RadDocking control, this does not occur.  What is best practice of placing the RadDocking control within tabs without encountering this behavior?

Thank you

Hi,
   I'm working in a Wpf application which requires the transparent header & body area. I tried using different themes available with the telerik control, i'm not able to achieve the desired result. If i set "Transparent" to the rowstyle, the default theme style comes up, but if i use any color it works fine. I have attached the sample of my required grid. Please help me to achieve the desired style. Also let me know how to disable or configure the mouseover effect for the Rows.


Thanks
Selva

Hi,

I have following markup for my RadGridView:


Now, when I hit "Enter" key the DisplayViewCommand is invoked in my ViewModel as expected.
But the DoubleClick doesn't work for some reason. (BTW: if I am double click on the Grid Header (the empty cell in top right corner) the command is triggered but of course I expect that current row double click should work also)


What I am doing wrong?

How co-ordinates of zoom rectangle can be captured for RadChart ?

Hi,
I have a little problem here with the WPF RibbonView-Control:
The SelectionChanged-Event is not raised, when a RibbonTab is selected.
The PreviewSelectionChanged-Event works as expected.

To be sure, that there are no side effects from my application, I made a simple
wpf app (VS2010, .NET Framework 4, Q2 2011) with a RadRibbonWindow, RadRibbonView,
two empty RibbonTabs and the SelectionChangedEvent. Same effect.

Any Idea, what I am doing wrong?

thanks, 
Thomas

Hi All,
I have a problem where I have gone mad about a solution in the last hours. I have a RadChart with two Y-axis and on the X-Axis I would like to see string labels instead of numbers, but I always see the numbers...
My XAML is the following:

The data class has four properties:

X => The counter of the value, not bound the the chart
XLabel => a string which should be visible in the X-Axis
Y1, Y2 => The values for the two Y-axis.

Can someone explain to me what I am doing wrong?

Thanks,
Chris

Dear experts!
I'm creating a persistent data streaming utility.
How it works:

1. some remote server constanly adds a new records to the database table
2. my app has a UI control to display few thousands of latest records - RadGridView

For 2. I use DispatcherTimer which asks for a new portion of data every second.
When new data comes, I simply rewrite old cell values.
So my datagrid has a constant number of rows - if I'll ask for 100000 latest rows in SQL query, I'll get 100000 rows in gridview.
I'm trying to be very careful with performance and to create as less new objects as it possible.
Maybe, my approach is far from optimal - I'll be happy to know better one.

So, my question is:

How to highlight new rows, added in a latest RadGridView ItemsSource change, with a best performance?

Here is a small quick demo project that illustrates my project in general.

(To run it you need SQL Server CE 3.5+)

Will be glad to get any help! :)

Regards,
Mykola