Hi

  We get this a Critical Error when we try to move around an event in a RadScheduleView:

System.NotSupportedException: Specified method is not supported.
   at Telerik.Windows.Controls.DraggedAppointmentsToLocalizedStringConverter.Convert(Object value, Type targetType, Object parameter, CultureInfo culture)
   at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
   at System.Windows.Data.BindingExpression.Activate(Object item)
   at System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt attempt)
   at System.Windows.Data.BindingExpression.MS.Internal.Data.IDataBindEngineClient.AttachToContext(Boolean lastChance)
   at MS.Internal.Data.DataBindEngine.Task.Run(Boolean lastChance)
   at MS.Internal.Data.DataBindEngine.Run(Object arg)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

  Currently we use Telerik version 2018.3.911.45 (Runtime Version V4.0.3.319).

  How can we fix this error?

Thank You,

Dave

Hi,

I'm having some problem with the synchronizing the combobox, when ItemsSource updates.

When I select an object and the combobox update, the item is perfectly synchronized with the selected objects value.

My problem is that my application poll new items every 10 sec and update/refresh the itemssource.  I'm using isSynchronizedWithCurrentItem = true and the combobox just set the first item by default, instead of displaying the actual value from the selected object, as before the itemssource updated.

How can I fix this?

  I've been having version issues with the Telerik DLLs so after lots of research and attempting to fix the issues to no avail I've decided to start a clean project and move my code over piece by piece in hopes of finding the culprit.  Everything is going well so far except my AutoCompleteBox does not show up in design mode or at runtime.  The XAML shows no errors and if you select the markup it highlights where the control should be but it remains invisible.  I had a similar problem with the RadButton but solved that by switching to the native WPF button.

Here is my XAML

This worked fine in my previous project until I started getting the weird errors that set off a frustrating chain of events that led me here. As for Telerik references I tried to minimize down to only what I absolutely needed.  At the moment I have Telerik.Windows.Controls and Telerik.Windows.Controls.Input.  This project was made using the Telerik WPF Project Template so I assumed all controls should work fine.  I am also using RadGlyphs and they are rendering just fine.

Hi,

what is the simplest way to change this white background behind tab "Home" as you can see on screenshot?

Thanks.

Hi, I'm running into an issue with the RadRibbonTab obscuring other content that should be in front of it.

The easiest way to illustrate this is with the attached screenshot. I put a breakpoint in the app when I click on an item inside the radRibbontab what is part of the RadRibbonView. The Z-order of the tab is higher than anything else on the screen, in this case obscuring other applications like visual studio. Note the order of the layers in the screenshot is my running WPF app is behind visual studio as expected, but the expanded ribbon tab is in front of it, obscuring part of visual studio.

This causes other issues in the application as well where the tab obscures other controls until the user explicitly hides the rad ribbon tab by focusing on the other control.

I am using VS Professional 2017, Version 15.8.0, .net version 4.7 and Telerik UI for WPF R3 2018

Thank you,

Chris

     Hi,

i'm trying to use KeyboardCommandProvider, with binding in a MVVM scenario for managing the Enter key(i don't want to move down). I've read this post, https://docs.telerik.com/devtools/wpf/controls/radgridview/commands/keyboardcommandprovider and i try to implement my CustomKeyboardCommandProvider without success; i've a usercontrol with insede a GridView but i've an error message: "The type CustomKeyboardCommandProvider does not include any accessibile constructor". How can i solve it in my scenario?

This is my code:

XAML:

<UserControl.Resources>
        <Conditional:CustomKeyboardCommandProvider x:Key="MyKeyboardCommand" />
    </UserControl.Resources>

<telerik:RadGridView Grid.Column="0" Grid.Row="1" Name="MyRadGridArtworks"
                                ItemsSource="{Binding GridViewList, Mode=TwoWay}"
                                SelectedItem="{Binding GridViewRowSelected, Mode=TwoWay}"                                            
                                EnableColumnVirtualization="False"
                                ValidatesOnDataErrors="None"              
                                ShowColumnSortIndexes="False"
    AutoGenerateColumns="False"
                                telerikControls:StyleManager.Theme="Office2013"                                          
    ColumnWidth="auto"                                         
    CanUserFreezeColumns="True"
                                LeftFrozenColumnCount="3"
                                ShowColumnFooters="True"                                      
                                KeyboardCommandProvider="{StaticResource MyKeyboardCommand}"
                                IsLocalizationLanguageRespected="False"
    RowIndicatorVisibility="Collapsed">

</telerik:RadGridView>

C# --> CustomKeyboardCommandProvider

public class CustomKeyboardCommandProvider : DefaultKeyboardCommandProvider
    {
        private GridViewDataControl dataControl;

        public CustomKeyboardCommandProvider(GridViewDataControl dataControl ) : base(dataControl)
        {
            this.dataControl = dataControl;
        }

        public override IEnumerable<System.Windows.Input.ICommand> ProvideCommandsForKey(System.Windows.Input.Key key)
        {

            if (key != System.Windows.Input.Key.Return)
                // use default behavior for all keys except Return
                return base.ProvideCommandsForKey(key);

            List<ICommand> commandsToExecute = new List<ICommand>();

            if (this.dataControl.CurrentCell == null)
                return commandsToExecute;

            if (this.dataControl.CurrentCell.IsInEditMode)
            {
                commandsToExecute.Add(RadGridViewCommands.CommitEdit);
            }
            else
            {
                commandsToExecute.Add(RadGridViewCommands.ActivateRow);
            }

            return commandsToExecute;
        }
    }

Hello,

I have problem with displaying group headers after when ever I change date in timeline view. There is xaml for schedule view:

GroupDescriptionsSource and ResourceTypesSource are initialized and filled by some data in view model constructor.
On image grupheader-ok.jpg - is all OK and this what I want every when I change date, but if I go to the future date, it displays like on image groupheader-problem.jpg and If I go back to the actual week (current date) then it displays like on image groupheader-problem-back.jpg.

Where could be problem?

Thank you for your answers.

I'm trying to display high speed live network traffic data in RadGridView with sort/filter support. There will be about 5000 record per second, each record is about 500 bytes in average. And user need to see the latest records as soon as possible. 

I found that RadGrivView is unresponsive in this scenario, even after I followed the Tips and Tricks of RadGridView Performance. I had profiled the performance with VS, and the result as follows. And we can see RadGridView related operation cost too much time.

Is the any way to improve the performance?

I have uploaded my test project to TelerikGridViewPerf.zip

Thanks in advance!

I'm getting this error in my code and I'm beyond frustrated

Could not load file or assembly 'Telerik.Windows.Controls, Culture=neutral' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

It started with a problem in my project where it wasn't running the same version of the code that I had, no idea why but at some point the project stopped building.  If I tried to place a breakpoint it wouldn't reach it saying code doesn't match.  My first step was to delete the bin\debug folder and rebuild: nothing, folder remains empty.  Research, try to figure out why.  Finally go into my project and see that my main project doesn't have a check next to the build column.  I check that and build and get a ton of errors because now it can't find the RadGlyph.  I do more research and most of the comments are about cleaning and rebuilding but that doesn't work.

I decide to unreference all my telerik DLLs and add in only the ones I need and make sure they are all the same version.  I finally get it to build and now my bin folder is filled with files.  I try to run my program and get the above issue.  I've checked all the forums, I've done a clean and rebuild multiple times, I checked my cproj file, here are my telerik versions

<Reference Include="Telerik.Windows.Controls, Version=2018.3.911.45, Culture=neutral, PublicKeyToken=5803cfa389c90ce7, processorArchitecture=MSIL" />
    <Reference Include="Telerik.Windows.Controls.Data, Version=2018.3.911.45, Culture=neutral, PublicKeyToken=5803cfa389c90ce7, processorArchitecture=MSIL" />
    <Reference Include="Telerik.Windows.Controls.GridView, Version=2018.3.911.45, Culture=neutral, PublicKeyToken=5803cfa389c90ce7, processorArchitecture=MSIL" />
    <Reference Include="Telerik.Windows.Controls.Input, Version=2018.3.911.45, Culture=neutral, PublicKeyToken=5803cfa389c90ce7, processorArchitecture=MSIL" />
    <Reference Include="Telerik.Windows.Data, Version=2018.3.911.45, Culture=neutral, PublicKeyToken=5803cfa389c90ce7, processorArchitecture=MSIL" />
    <Reference Include="Telerik.Windows.Themes.Office2013, Version=2018.3.1016.45, Culture=neutral, PublicKeyToken=5803cfa389c90ce7, processorArchitecture=MSIL">
      <HintPath>..\packages\Telerik.Windows.Themes.Office2013.for.Wpf.2018.3.1016\lib\net45\Telerik.Windows.Themes.Office2013.dll</HintPath>
    </Reference>

I even commented out the Office2013 theme, I figured the difference in version is because it's a theme but just in case I tried it with no luck. 

I'm at the end of my rope.  Any help would be appreciated.