private void RadRibbonView_SelectionChanged(object sender, RadSelectionChangedEventArgs e)
        {

              if (ribbon.SelectedItem is RadRibbonTab)
                {
                    //keepBackstageOpen = false;
                    //MasterRadRibbonView.IsBackstageOpen = false;
                    System.Diagnostics.Debug.WriteLine("RadRibbonTab");
                }
                else if (ribbon.SelectedItem is RadRibbonBackstage)
                {
                    //keepBackstageOpen = true;
                    //MasterRadRibbonView.IsBackstageOpen = true;
                    System.Diagnostics.Debug.WriteLine("RadRibbonBackstage");
                }

        }

If I click on the backstage, this always triggers as a tab (the last one selected), and not as the backstage...which is causing me many problems.

Any advice ?

Good morning, i had a issue when a try to move the RadPane that contains the RadGridView only when i use the theme VisualStudio2013. I try everything, with  any other theme work just fine. Pop into Output window in Visual Studio the following binding error for each column i have int the RadGridView, and it slows the application in a way that is very painful :

System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor AncestorType='Telerik.Windows.Controls.GridView.DataCellsPresenter', AncestorLevel='1''. . BindingExpression:Path=Foreground; DataItem=null; target element is 'ContentControl' (Name='PART_ContentPresenter'); target property is 'Foreground' (type 'Brush')

I try taking of styles of header cells and such, but does not work. The others themes works with custom styles and without it.

I want to add context menu for RadGridView and tried below code.. but it gives error as in the attached screenshot. please let me know how to proceed.

<telerik:RadGridView x:Name="radGridView" AutoGenerateColumns="False">
            <ui:RadContextMenu.ContextMenu>
                <ui:RadContextMenu x:Name="GridContextMenu" />
            </ui:RadContextMenu.ContextMenu>
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding FirstName}" Header="First Name"/>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding LastName}" Header="Last Name"/>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding Age}" Header="Age"/>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding IsMarried}" Header="Married"/>
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>

Hello,

Our app is extremely heavy with Telerik controls (we use it for just about everything in our UI). We've been getting complaints about the overall memory footprint of our app. Obviously most of that would likely be due to data and business logic, but we also were looking to do an analysis of all (Terlerik) controls being used to see if any are contributing factors. One of our designers mentioned that he feels the Telerik grid control is "very expensive" from a memory point of view - and we use it all over the place in our app, even in places where the stock WPF grid control may have been good enough.

Are there any utilities to track all the controls memory usage ?....or any ways to tap into the controls to find out the memory usage of each individually ?

Any suggestions would be appreciated.

Thanks,

Barry

Can i set the TreeListViewItem visibility to visible or hide, when i use the treelistiview in Virtualization model.

I want to use this method to search something,or may be another?

Hi.

When clicked crop item and then directly press save button, cropped image is saved.It seems cropped result image save.

What i want  no cropping just save image. Please refer to the file for details.

How can i get uncropped image.

Please give me advise. 

Thanks reading this post.

Hi Telerik support team,

I have a TabbedWindow with RadTabItems generated dynamically from code behind. In each RadTabItem, there is frame that I navigated to a Page.

The trouble is that: When a user drags a tab out of a host TabbedWindow, if the drop is inside a RadTabItem (I meant users just drag out the header and drop inside a tab), the tab is not dragging out. In plus, since this moment, all drag-out is not working even drop area is outside a tab.

Many thanks for your support

Here is my code in C#:

And Xaml as below:

Hi,

I have a GridView with GridViewSelectColumn ,which have binded itemsource and seted selectionmode "Multiple".But the grid always have selected the fist value of itemsource and the selecteditem is same value.

 My expectation is nothing selected,how to solve it.

Regards,
Guo

Hello,

I'm trying to implement GIF for my GridView but it isn't animated. Does GridView support GIFs?

My example:

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:NotWorkingGif"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" x:Class="NotWorkingGif.MainWindow"
        mc:Ignorable="d"
        DataContext="{Binding RelativeSource={RelativeSource Self}}"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <telerik:RadGridView ItemsSource="{Binding Collection}" AutoGenerateColumns="False">
            <telerik:RadGridView.Columns>
                <telerik:GridViewImageColumn DataMemberBinding="{Binding ImageUri}" Header="" ImageStretch="None" ImageHeight="16" ImageWidth="16" />
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>
    </Grid>
</Window>

namespace NotWorkingGif
{
    using System;
    using System.Collections.ObjectModel;
    using System.ComponentModel;
    using System.Windows;

    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public ObservableCollection<TestClass> Collection { get; set; } = new ObservableCollection<TestClass>();

        public MainWindow()
        {
            InitializeComponent();

            this.Collection.Add(new TestClass() { ImageUri = new Uri(@"path to GIF image") });
        }
    }

    public class TestClass : INotifyPropertyChanged
    {
        private Uri imageUri;
        public Uri ImageUri
        {
            get => imageUri;

            set
            {
                imageUri = value;
                this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("ImageUri"));
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;
    }
}