Hi,

after last release updated my treeview get the following random error:

Application_UnhandledThreadException

Output: A first-chance exception of type 'System.NullReferenceException' in Telerik.Windows.Controls.GridView.dll

StackTrace:

Hi,

I'm migrating from RadScheduler to RadScheduleView but I can't get mouse double click to open the Create Appointment dialog. I've tried to create the a simple project where I'm only showing a RadScheduleView and a few appointments but nothing happens when I double click in the ScheduleView. In RadScheduler the AppointmentCreating event was fired when i double-clicked in the scheduler. Maybe I've missed something, but I don't know what. I tried looking at the demo app, where this functionality is working, but I can't see where my app differs from the demo.

I would be greatful if someone could give me a hint.

Best regards,
Windev

I notice that sometimes the Mousedown works correctly by selecting the cell being clicked.

Other times, it will scroll back to the top.

I've attempted to add the following code to handle tho Mouse Left Button, and it builds, but doesn't compile.

In constructor:

        gridLineItem.MouseLeftButtonDown += new MouseButtonEventHandler(gridLineItem_MouseDown);

And later on:

        private void gridLineItem_MouseDown(object sender, MouseEventArgs e)
        {
            var foo = 42;
        }

 

If I add a debugger breakpoint inside gridLineItem_MouseDown, it doesn't fire.

The goal is to have the Mouse Left Button consistently select the cell clicked on, and not to scroll to the top.

 

Any suggestions?

Hi ..how to acsess the control  like textbox, label inside the radgridview  by clicking the button outside

I am currently having 2 issues with the RadGridView

1)
I am receiving calls from a WCF Service in the client that do the usual CRUD actions.  Of course this comes in on a different thread than the UI thread.  So I have a dispatchable observable collection with the code below.

    using System;
    using System.Collections.Generic;
    using System.Collections.ObjectModel;
    using System.Collections.Specialized;
    using System.Windows.Threading;
 
    public class DispatchableObservableCollection<T>
        : ObservableCollection<T>
    {
        public DispatchableObservableCollection()
        {
        }
 
        public DispatchableObservableCollection(IEnumerable<T> collection)
            : base(collection)
        {
        }
 
        // Override the event so this class can access it
        public override event NotifyCollectionChangedEventHandler CollectionChanged;
 
        protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
        {
            // Be nice - use BlockReentrancy like MSDN said
            using (BlockReentrancy())
            {
                NotifyCollectionChangedEventHandler eventHandler = CollectionChanged;
                if (eventHandler != null)
                {
                    Delegate[] delegates = eventHandler.GetInvocationList();
                    // Walk thru invocation list
                    foreach (NotifyCollectionChangedEventHandler handler in delegates)
                    {
                        DispatcherObject dispatcherObject = handler.Target as DispatcherObject;
                        // If the subscriber is a DispatcherObject and different thread
                        if (dispatcherObject != null
                            && !dispatcherObject.CheckAccess())
                        {
                            // Invoke handler in the target dispatcher's thread
                            dispatcherObject.Dispatcher.Invoke(DispatcherPriority.DataBind,
                                                               handler,
                                                               this,
                                                               e);
                        }
                        else // Execute handler as is
                        {
                            handler(this,
                                    e);
                        }
                    }
                }
            }
        }
    }

The problem is the object subscribed to NotifyCollectionChanged event for the grid  is WeakEvent.WeakListener and the cast to DispatcherObject fails (null).   How do I get the DispatcherObject from handler.Target.  I'm trying to make this work so that I don't have to use Application.Current.Dispatcher as a bail out so that it will work for UI objects not on the primary UI thread.  Is there a work around?


2)

I have detected some odd behavior for add new item.  If I have a grid and remove all items and then want to add more back into the grid it works fine.  However, if I remove all items from the collection and then close the application and restart when I click the add new item header nothing happens.  i.e.,  a new row is not added.  The collection I am using is the one above and the collection is there (Not null), it is just empty.  Thoughts?


Thanks for the help,

Rick
 

Hi,

I have to create a simple page that display same group of controls in a tab item multiple times. Idea is that user can click a button and create a copy of that UI multiple times. 

Is there a way to do it without creating a user control? A simple way to create a copy of the selected tab will be helpful. Kindly let me know if there is any possibility to do so.

Hi Team,

I have a problem with Telerik RadGridView 2015.1.225.40 version on Windows 7 64 bits. In my application I show a virtualized grid with a large number of columns (up to 45 although the user can select the columns to see). Data types are showing dates, text, images, combos, etc. The number of rows can vary but usually not more than 40.

The columns are created dynamically in the ViewModel. Depending on the type of data to show, a different type of column is used. To show simple data is used GridViewDataColumn but to show more specific data (e.g. dates) types of custom columns are used. An example is:

The RadTimePickerColumn type is declared as follows:

RadGridView creation is performed as follows. Caliburn.Micro version 1.5.2 is used:



The problem is when,  in some cases seemingly random, moving the horizontal or vertical movement the application is apparently locked (frozen). But if not completely so that is almost unmanageable. CPU consumption of the process is triggered by 3% to 25% normal use. One solution is to close the tab where the grid is contained and reopen.

What could be happening?

Hi,

 I have below code implemented, which shows the formatted value.

 

my query here is,  the control does not update Property, when user hits "Delete" / "Backspace" Keyboard button. What is the possible workaround here?

 

Note: I don't want to use the "_" or " " mask here

 

I came across "IsValueChangingFromInternal " property of InputBase, but didn't get enough documentation or samples around it to figure out, if i could use that.

Can you please help me resolve the issue?

 

Thanks in Advance :)

Sagar

 

 

 

 

Hello,

I want to show the panzoombar when the user zoom the chart, and hide the panzoombar if there is no zoom. So I implement this:

I add tiggers in the a style for panzoombar:

In the view model:

The chart:

 <telerik:RadCartesianChart Grid.Row="2" x:Name="Chart" Margin="20" Zoom="{Binding Zoom, Mode=TwoWay}">

 

The problem is, it work only for the first time, at the beginning, there is no zoom, so the panzoombar hides correctly, after I zoom, the panzoombar appear correctly, but if I reset zoom to (1,1), and zoom again, the panzoombar never appear, I don't know why? I use snoop to check and find out the visibility of the panzoombar is changed correctly, but I still can not see it.

 Do you have any ideas?

 

Thanks,

Jie

 Normally when you sort a column wether the groups are open or closed is remembered.

 But when adding Custom sorting to RadGridView and all the groups are collapsed when sorting, but if you add AutoExpandGroups all groups are expanded.

 I figure the reason is that the items are re-added to the collection.

 

I would really like to have the default behaviour, where the open groups are open and the closed are closed, event after sorting.

Is there a way to do this??

 

Regards

Martin