Hi, I have:
1) Telerik 2013 Q2 SP1;
2) Entity Framework DB (Linq to MySql);
3) Simple table: FirstName(NotNull),  LastName(NotNull), Date(Null).
4) Checked for NULL (in MySQL DB and in my Project), i.e. both properties must be NotNull;
5) Made a row validation (it's working, but when I press ESC and then trying to edit another row => the TargetInvocationException fires or smth similar in files such as Cell....cs, Gridview.....cs - I even don't have it);
The question is how to prevent this?
Code:

We have a requirement to display, along with other columns, a cumulative value column within the RadGridView.  To do this we attach a behavior to the RadGridView.  The relevant code from the behavior is this:


The basic idea of the above code is that on RowEndEdit and on DataLoaded the cumulativelength value is recalculated.

Everything works as expected when the user selects another row after editing a row (i.e. the cumulative length is updated).  However when the user clicks on anywhere else in the UI an ArgumentNullException is thrown (the message is 'Value cannot be null').  The Stack trace is:


I have tracked this down to the call to Rebind() on the RowEditEnded.

Note we are trying to use Rebind here instead of just raising PropertyChanged event from component.TotalLength as we are not in control of that library.

Hi,

I'd like to customize schedule view control so Day view looks like the attached picture. Do you think is possible to reach the desired look?

Thanks.

I am trying to do MVVM with data binding to GraphSource using a ObservableGraphSourceBase.  When I drop a container from the DiagramToolbox.  How would be able to associate that container with view model item and still be able to undo or redo adding that item to the diagram?

Hello,

I'm wondering how I can let a header do texttrimming?
In the picture below, you can see that my column values are being trimmed, but the header text isn't..

http://imageshack.us/photo/my-images/843/jrsp.png/

Thanks!

Hi,

how can i add a errorhandling to a RadMaskedTextInput? On LostFocus-Event i check if the Input is ok or not. If the
Input is not ok, i want to clear the RadMaskedTextInput and set the Cursor back in the box.

To clear is no problem:

RadMaskedTextInput.Text = "";

But how to set the Focus?

RadMaskedTextInput.Focus(); does not work.

Thanks Best Regards
Rene

the above code giving the error as "The Resource 'Localized strings ' could't be resolved

<TelerikPopup:GridViewComboBoxColumn.Header>
                                                                <TextBlock Text="{Binding Source={StaticResource localizedStrings}, Path=LabelString.LocalizationResources.UOM, FallbackValue='UOM'}"/>
                                                            </TelerikPopup:GridViewComboBoxColumn.Header>
How to Resolve it

How do I prevent the selction changed event from firing when a listbox item is selected for drag drop?

The main WPF form contains the RadDock. The RadDock has a RadPaneGroup that is docked left. RadPanes containing RadListBox controls are added to this RadPaneGroup based on user selection, an example being a list of customers.

The RadDock has a second RadPaneGroup, and this RadPaneGroup is in the DocumentHost property of the RadDock so that its RadPanes open as tabbed documents.

An example of normal behavior is that a RadListbox containing a list of customers appears in a RadPane that is in the docked left RadPaneGroup. A user selects a specific customer from the list, the selection changed event fires, and the application adds a RadPane to the Document host RadPaneGroup so that details about the selected customer are shown as a tabbed document.

One of the user actions is to create a shopping cart. A menu option is chosen and a RadPane containing the shopping cart information is added to the DocumentHost RadPaneGroup. The first thing that a user needs to do is associate a customer to the shopping cart. The idea is that the user would drag a customer from the RadListbox contained in a docked left RadPane onto the RadPane that is in the document host RadPaneGroup and shown as the currently active tabbed document.

My problem is that when I left click and hold down the mouse button to drag an item out of the RadListbox that is in the docked left RadPaneGroup, the RadListbox selection changed event fires, which then opens a customer details RadPane in the tabbed document DocumentHost area; the shopping cart is no longer visible because it is no longer the active tab.

The desired behavior is that the RadListbox selection changed event does not fire during a drag / drop operation so that I can drag the selected customer from the RadListbox contained within the docked left RadPane onto the empty shopping cart RadPane that is displayed as a tabbed document in the DocumentHost.

Do you have any vb.net examples, or documentation that would explain the desired behavior?

Hello, i'll wrote my app with mvvm pattern and have a problem with selecting item programmatically in resourcedictionary.
I have TreeListView on the one resourcedictionary and GridView in another. Also I have two ObservableCollection 1 and 2 wich i bind.
When user select item in the TreeListView and this item has a reference to another items at this (1) then i add referenced items to anothe ObservableCollection (2). GridView bind to the ObservableCollection (2) and when the user select item from GridView 
at the ObservableCollection (2) I find the same item in ObservableCollection (1) and set the "SelectedItem" to it and the problem is that the  TreeListView didn't Expand parents to the SelectedItem. Help me pleas! Attached example below.
Best Regards,
Dmytro.