Hello,

I need to get selected TreeView Node name and bind it to ViewModel property.

I used the following behavior to get SelectedItem from WPF TreeView, but when changed to RadTreeView the SelectedItemChanged  is not recognized. 

Is there any example on ho to get SelectedItem using WPF MVVM ?

 public class TreeViewSelectedItemBlendBehavior : Behavior<RadTreeView>
    {
        //dependency property
        public static readonly DependencyProperty SelectedItemProperty =
            DependencyProperty.Register("SelectedItem", typeof(object),
            typeof(TreeViewSelectedItemBlendBehavior),
            new FrameworkPropertyMetadata(null) { BindsTwoWayByDefault = true });

        //property wrapper
        public object SelectedItem
        {
            get { return (object)GetValue(SelectedItemProperty); }
            set { SetValue(SelectedItemProperty, value); }
        }

        protected override void OnAttached()
        {
            base.OnAttached();
            this.AssociatedObject.SelectedItemChanged += OnTreeViewSelectedItemChanged;
        }

        protected override void OnDetaching()
        {
            base.OnDetaching();
            if (this.AssociatedObject != null)
                this.AssociatedObject.SelectedItemChanged -= OnTreeViewSelectedItemChanged;
        }

        private void OnTreeViewSelectedItemChanged(object sender,
            RoutedPropertyChangedEventArgs<object> e)
        {
            this.SelectedItem = e.NewValue;
        }
    }

Thank you,

Vadim

there is a difference between window view at run time and when it is showed in the XAML code.how can fix it?

I have used RibbonWindow and in the XAML file.

two pictured is attached

Hello, i'm trying to center my text vertically in my autocompletebox but te text stays centered on top. Why is this ?

this is my complete code:

Hello,

Let's suppose I have a large DB of vehicles. One of the tables is tblColors that has a numeric ColorCode and a string ColorName (say there's about a hundred of those).

The main table contains a ColorCode of the vehicle but I need to show ColorName in my grid. What I do is I create a TypeConverter that goes like

Then I go to my grid and create a column:

First of all: am I doing this right? I don't want to query my other table on each row loading so I just preload (or hard-code) the code->name relation.

Second question is, now when I click on the filtering symbol for the Color column, I'm getting the numbers not the converted values. I could preload the values (as a List<String>) in the DistinctValuesLoading event but then when I'm trying to filter I'm getting a "System.FormatException: Input string was not in a correct format."

Thank you.

Hello.

If RadCartesianChart uses an instance of RadObservableColection as DataSource and there are a lot of data points (for example 100000 points of data) in this RadObservableColection, is there (in this case) RadCartesianChart works with virtual (disk) memory (locating RadObservableColection in virtual memory)? Or RadCartesianChart uses only RAM memory space in this case (so RadObservableCollection is in the computer's RAM)?

What role does RadGridViewAutomationPeer? 

I have a RadGridView in my application, but when I change my DataContext to a new object containing a new List for the ItemsSource, the RadGridView is still holding all the old objects from the old List used by the ItemsSource in memory through this RadGridViewAutomationPeer. Not knowing what the AutomationPeer does, I'm at a bit of a loss as to how to get it to release those old objects. I wasn't able to find any useful information on this class. I've attached the memory retention chart from dotMemory showing my CurveSets being held.

Here's the xaml for the chart:

Hi, I'm using the same approach as a demo I came across on a forum post. It works well if the # of rows is small, but once you start to add hundreds of rows, the performance goes down dramatically. Any idea how to solve this?

Demo can be found here. It's almost like yours except with a for loop creating a larger dataset. Takes over 5 mins to get the print.

https://uploadz.co/w6b9ghawf6uu