How to hide/show a whole property defintion

22 posts, 0 answers
  1. Song
    Song avatar
    6 posts
    Member since:
    Jun 2011

    Posted 29 Mar 2012 Link to this post

    Hi Guys,

        I have made it to hide/show value column of a property individually, but does not make it work to show/hide the whole property row(not only the value column, but also the label column). What's more how to hide a whole group?

        You are really appreciated if you could share some code. Thank you very much.
  2. Pavel Pavlov
    Admin
    Pavel Pavlov avatar
    2039 posts

    Posted 29 Mar 2012 Link to this post

    Hi,

    You may hide property definitions by removing them from the RadPropertyGrid.PropertyDefinitions collection.

    Greetings,
    Pavel Pavlov
    the Telerik team
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  4. Song
    Song avatar
    6 posts
    Member since:
    Jun 2011

    Posted 29 Mar 2012 Link to this post

    Hi Pavel,

           Thank you for the information. but I'm using the PropertyGrid control under MVVM, no MVVM framework introduced. Was that meaning that View Model should know the control instance.
     
           Would you please share more information? As PropertyDefinition has no Visibility property which can be bound to show/hide it.
  5. Ivan Ivanov
    Admin
    Ivan Ivanov avatar
    1128 posts

    Posted 29 Mar 2012 Link to this post

    Hi Song,

    A visibility property for the PropertyDefinition type has been introduced with Q1 SP (2012.1 326). Would you please confirm whether it meets your requirements?

    Greetings,
    Ivan Ivanov
    the Telerik team
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  6. Song
    Song avatar
    6 posts
    Member since:
    Jun 2011

    Posted 29 Mar 2012 Link to this post

    Hi Pavel,

            That's great, thank your for the information. I will download the version and have a try.

            With the binding to visibility property, the view model can control what properties to be shown.
  7. Song
    Song avatar
    6 posts
    Member since:
    Jun 2011

    Posted 29 Mar 2012 Link to this post

    Hi Ivan,
            I saw the Visibility property in PropertyDefinition, it works if I gave Collapsed to it(when the user control loaded), the third property definition is hidden.

            But the second one which bound is not working, actually I did not see the bind source(Property0BindSource) in Visibility is called.

            So my question is if the Visibility property support binding, orI have wrong usage.

            Our requirement is to make the Visibility of a PropertyDefinition can be changed in program in MVVM.

            Thank you very much.
                            

             <UserControl.Resources>

                <Converter:BooleanToVisibility x:Key="converter" />

            </UserControl.Resources>

                  <telerik:PropertyDefinition Binding="{Binding Property0BindSource}" GroupName="Group1" DisplayName="Property0" OrderIndex="100" />
                  <telerik:PropertyDefinition Binding="{Binding Property1BindSource}" GroupName="Group1" DisplayName="Property1" OrderIndex="101" Visibility="{Binding Property0BindSource, Converter={StaticResource converter}}"/>
                  <telerik:PropertyDefinition Binding="{Binding Property2BindSource1}" GroupName="Group1" DisplayName="Property2" OrderIndex="102" Visibility="Collapsed"/>
              
  8. Ivan Ivanov
    Admin
    Ivan Ivanov avatar
    1128 posts

    Posted 30 Mar 2012 Link to this post

    Hi,

    I believe that you have wrong DataContext for your PropertyDefinitions. Would you please try setting the binding like this:
    <telerik:RadPropertyGrid x:Name="rpg" AutoGeneratePropertyDefinitions="False">
                <telerik:RadPropertyGrid.PropertyDefinitions>
                    <telerik:PropertyDefinition Binding="{Binding StringProp}" Visibility="{Binding Item.VisProp, ElementName=rpg}" />
                </telerik:RadPropertyGrid.PropertyDefinitions>
            </telerik:RadPropertyGrid>


    All the best,
    Ivan Ivanov
    the Telerik team
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  9. Song
    Song avatar
    6 posts
    Member since:
    Jun 2011

    Posted 05 Apr 2012 Link to this post

    Hi Ivan,
         Sorry for delayed response as I were out of office recently. I have tried as your suggestion. but still did not make it work
         I'm wondering if you would look at my code and give me more instruction.

         The WorkingExample.xaml and WorkingExampleViewModel.cs are the view and view model, which I can hide VisaNo property value column and Friend property value column according to IsChild and IsLicensed property in View Model. You could see that the visiblity property of a textbox is working with binding to a property in the view model, but I can not make it work on PropertyDefinition.
       
          Our requirement for this sample code is that
         1.) if IsChild is checked, hide VisaNo PropertyDefinition, otherwise show it
         2.) if IsLicensed in ViewModel is true, show Friend PropertyDefinition, otherwise hide it.

        As I can not upload the whole sample solution, so I just attached the view and view model
      

     1. WorkingExample.xaml:
    <Window x:Class="RadControlsWpfApp1.WorkingExample"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
                    xmlns:Converter="clr-namespace:RadControlsWpfApp1" Title="MainWindow" Height="350" Width="525">
        <Window.Resources>
            <Converter:BooleanToVisibility x:Key="converter" />
            <Converter:DTSelector x:Key="dataTemplateSelector">
                <!--<Converter:DTSelector.IsChildDataTemplate>
                    <DataTemplate>
                        <CheckBox x:Name="cbIsChild" BorderBrush="White"  IsChecked="{Binding Path=IsChild}"/>
                    </DataTemplate>
                </Converter:DTSelector.IsChildDataTemplate>-->
                <Converter:DTSelector.VisaNoDataTemplate>
                    <DataTemplate>
                        <TextBox BorderBrush="White"  Text="{Binding Path=VisaNo}" Visibility="{Binding Path =IsChild, Converter={StaticResource converter}}"/>
                    </DataTemplate>
                </Converter:DTSelector.VisaNoDataTemplate>
                <Converter:DTSelector.FriendDataTemplate>
                    <DataTemplate>
                        <TextBox BorderBrush="White"  Text="{Binding Path=Friend}" Visibility="{Binding Path =IsLicensed, Converter={StaticResource converter}}"/>
                    </DataTemplate>
                </Converter:DTSelector.FriendDataTemplate>

            </Converter:DTSelector>
        </Window.Resources>
      <Grid>
            <telerik:RadPropertyGrid x:Name="propertyGrid" Item="{Binding}" EditorTemplateSelector="{StaticResource dataTemplateSelector}"
                                     LabelColumnWidth="100" AutoGeneratePropertyDefinitions="False" DescriptionPanelVisibility ="Collapsed" SortAndGroupButtonsVisibility="Visible"
                                     IsGrouped="True"
                                     Height="600" MaxHeight="600"
                                     >
                <telerik:RadPropertyGrid.PropertyDefinitions>
                    <!--General Group-->
                    <telerik:PropertyDefinition Binding="{Binding Name}" GroupName="General" DisplayName="Name" OrderIndex="0" />
                    <telerik:PropertyDefinition x:Name="IsChildProp" Binding="{Binding IsChild}" GroupName="General" DisplayName="Is Child" OrderIndex="1" />
                    <!-- the below visibility setting is not working -->
                    <telerik:PropertyDefinition Binding="{Binding VisaNo}" GroupName="General" DisplayName="VisaNo" OrderIndex="2" Visibility="{Binding Path=IsChild, Converter={StaticResource converter}}" />
                    <!--<telerik:PropertyDefinition Binding="{Binding VisaNo}" GroupName="General" DisplayName="VisaNo" OrderIndex="2" Visibility="{Binding IsChecked, ElementName=cbIsChild, Converter={StaticResource converter}}" />-->
                    <telerik:PropertyDefinition Binding="{Binding Friend}" GroupName="General" DisplayName="Best Friend" OrderIndex="3" />
                </telerik:RadPropertyGrid.PropertyDefinitions>
            </telerik:RadPropertyGrid>
        </Grid>
    </Window>

     2. WorkingExampleViewModel.cs:
        public class WorkingExampleViewModel: INotifyPropertyChanged, IDataErrorInfo
        {

            public WorkingExampleViewModel()
            {
                CurrentPeople = new People {Name = "Peter", IsChild = false, Friend = "John", VisaNo = "G1520110"};
                //remove below setting, the friend value will be hide
                //if is not licensed, hide friend property
                IsLicensed = true;
            }

            private string _name;
            public string Name
            {
                get { return CurrentPeople.Name; }
                set
                {
                    if (_name == value) return;
                    _name = value;
                    CurrentPeople.Name = value;
                    OnPropertyChanged("Name");
                }
            }
            private bool _isChild;
            public bool IsChild
            {
                get { return CurrentPeople.IsChild; }
                set
                {
                    if (_isChild == value) return;
                    _isChild = value;
                    CurrentPeople.IsChild = value;
                    OnPropertyChanged("IsChild");
                }
            }
            private string _friend;
            public string Friend
            {
                get { return CurrentPeople.Friend; }
                set
                {
                    if (_friend == value) return;
                    _friend = value;
                    CurrentPeople.Friend = value;
                    OnPropertyChanged("Friend");
                }
            }
            private string _visaNo;
            public string VisaNo
            {
                get { return CurrentPeople.VisaNo; }
                set
                {
                    if (_visaNo == value) return;
                    _visaNo = value;
                    CurrentPeople.VisaNo = value;
                    OnPropertyChanged("VisaNo");
                }
            }
            private People _currentPeople;
            public People CurrentPeople
            {
                get { return _currentPeople; }
                set
                {
                    if (_currentPeople == value) return;
                    _currentPeople = value;
                    OnPropertyChanged("CurrentPeople");
                }
            }
            private bool _isLicensed = false;
            public bool IsLicensed
            {
                get { return _isLicensed; }
                set
                {
                    if (_isLicensed == value) return;
                    _isLicensed = value;
                    OnPropertyChanged("IsLicensed");
                }
            }
            public event PropertyChangedEventHandler PropertyChanged;
            public void OnPropertyChanged(string propertyName)
            {
                if (PropertyChanged != null)
                {
                    PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
                }
            }
    }       
            3. app.xaml.cs
            protected override void OnStartup(StartupEventArgs e)
            {
                base.OnStartup(e);

                // only can hide value column using DataTemplate Selector
                // we would like to make it if IsChild unchecked, hide whole propertydefinition of VisaNo
                // if IsLicensed = false, hiden whole propertydefinition of Friend
                var window = new WorkingExample();
                var viewModel = new WorkingExampleViewModel();

                window.DataContext = viewModel;

                window.Show();
            }

        I guess it's something related wrong usage, but not sure how to correct them.

        Thank you very much.

     

  10. Ivan Ivanov
    Admin
    Ivan Ivanov avatar
    1128 posts

    Posted 05 Apr 2012 Link to this post

    Hello,

    On the one hand PropertyDefiniton is DependencyObject, but on the other hand PropertyDefinitons are not included in the visual tree (they just serve as view models for their respective PropertyGridFields), so that they support binding, but they cannot be bound with ElementName source. In order to achive this you might try using a property in your view model to which both PropertyDefinition and CheckBox are bound.

    Greetings,
    Ivan Ivanov
    the Telerik team
    Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get it now >>
  11. Song
    Song avatar
    6 posts
    Member since:
    Jun 2011

    Posted 05 Apr 2012 Link to this post

    Hi Ivan,

            Sorry I did not catch your point completely, in my sample code, IsChild is the property in ViewModel which is bound to both PropertyDefinition and CheckBox, but the PropertyDefinition was not working.

           The data template selector I used in sample code is to check that the property IsChild can be bound to visiblity of a text box, so that if IsChild changed to false, the textbox can be hidden, this is the workaround as it can only hide PropertyDefinition value column, not whole property definition. Actually this is not the perfect one.
    <!-- IsChild is bound to Visibility and it's hidden once IsChild is false -- >
     <Converter:DTSelector.VisaNoDataTemplate>
                    <DataTemplate>
                        <TextBox BorderBrush="White"  Text="{Binding Path=VisaNo}" Visibility="{Binding Path =IsChild, Converter={StaticResource converter}}"/>
                    </DataTemplate>
                </Converter:DTSelector.VisaNoDataTemplate>

            What I expected is that if PropertyDefinition Visibility supports full binding, the below code(in BOLD) should be working, but as I mentioned before, actually it does not work.  
            if I can not make it work with any solution via Binding to visibility of PropertyDefinition(could you give me some code which can work),
     then I guess we have to turn to code behind to remove propertydefintion(to be hiden) from PropertyDefinitions.

            <telerik:RadPropertyGrid x:Name="propertyGrid" Item="{Binding}" EditorTemplateSelector="{StaticResource dataTemplateSelector}"
                                     LabelColumnWidth="100" AutoGeneratePropertyDefinitions="False" DescriptionPanelVisibility ="Collapsed" SortAndGroupButtonsVisibility="Visible"
                                     IsGrouped="True"
                                     Height="600" MaxHeight="600"
                                     >
                <telerik:RadPropertyGrid.PropertyDefinitions>
                    <!--General Group-->
                    <telerik:PropertyDefinition Binding="{Binding Name}" GroupName="General" DisplayName="Name" OrderIndex="0" />
                    <telerik:PropertyDefinition x:Name="IsChildProp" Binding="{Binding IsChild}" GroupName="General" DisplayName="Is Child" OrderIndex="1" />
                    <telerik:PropertyDefinition Binding="{Binding VisaNo}" GroupName="General" DisplayName="VisaNo" OrderIndex="2" Visibility="{Binding Path=IsChild, Converter={StaticResource converter}}" />
                    <telerik:PropertyDefinition Binding="{Binding Friend}" GroupName="General" DisplayName="Best Friend" OrderIndex="3" />
                </telerik:RadPropertyGrid.PropertyDefinitions>
            </telerik:RadPropertyGrid>
  12. Allen
    Allen avatar
    50 posts
    Member since:
    Mar 2011

    Posted 19 Apr 2012 Link to this post

    I think I am having a similar but simpler problem.  I just want the PropertyDefinitions to be made up of 1:N PropertyDefinition that are bound to Viewmodel properties.  Thus an 'Item' is really the set of viewmodel properties that I wish to set with this RadPropertyGrid.  This does not seem possible.  WHen I attempt this, there is no binding error as such except the data is null although the viewmodel has data in the window on which the RadPropertyGrid lives, and I can bind to this ViewModel's properties from another user control no problem.

    I do see that the original source for this thread had a CurrentPeople
    model object with fields that serves as the data source for the ViewModel that is the DataContext for the RadPropertyGrid.  The RadPropertyGrid binds to public properties that are in turn backed by model member properties.   Does this mean  I have to construct a phony object model or Viewmodel of just the properties I care to manage this way?   Seems a  convoluted approach, particularly the use of backing private fields  e.g. apparently unused _name for public viewmodel property Name just to get at the CurrentPeople.Name  object's fields.

    All of this effort for me, by the way, is aimed at setting properties in the User configuration like 'Logging Level' or 'Telerik Theme To Use' or 'Default Date'., so really  I would really like to just bind the RadPropertyGrid to one or several of the User.Config settings directly and be done with this.  I already have a dialog for most of the properties but I wanted to provide the generic one for access to some less important ones like the log config file name and so on that normally don't ever change but might need to be changed for special circumstances. This seems like such a common need that I wonder why the 'Getting Started' does not address it directly as an example?

    Any help would be appreciated.


    Thank you.
  13. Ivan Ivanov
    Admin
    Ivan Ivanov avatar
    1128 posts

    Posted 23 Apr 2012 Link to this post

    Hi guys,

    @Hontas. What do you mean by saying "full binding support"? It has full binding support, but it also still has to respect the core binding concepts of .NET framework. ElementName binding works in a single name scope. According to the reasons that I have listed in the previous post of mine, the PropertyDefinition instance and the CheckBox are in separate name scopes, so that your approach does not work. This is absolutely expected.
    As for the second code snippet of yours, you are binding the Visibility property like this:
    <telerik:PropertyDefinition Binding="{Binding VisaNo}" GroupName="General" DisplayName="VisaNo" OrderIndex="2" Visibility="{Binding Path=IsChild, Converter={StaticResource converter}}" />
    PropertyDefinition directly inherits from DependencyObject, so that it support binding. But PropertyDefinition does not inherit from FrameworkElement and it does not have DataContext, which would be the default binding source. In order to make it work you should explicitly specify source and the easiest way to achieve this is to expose your view model instance as a resource, so that you could reference it in XAML. Please, let us know whether you need any additional assistence with the implementation of this.

    @Allen Basically, in order to use RadPropertyGrid you only need a clr object that exposes the public properties, which values you want to display/modify. As RadPropertyGrid works exclusively with framework's binding mechanism, it cannot "read" field values, unless they are backed with the appropriate public properties. You have mentioned that you want to bind the control to one or several items. In order to achieve this, you do not need to create a fake ViewModel that exposes their properties. You can alternatively use the PropertySets feature of RadPropertyGrid. I have prepared a simple example project for your that illustrates how it works. I am attaching it for your reference.

    Guys, we will be glad to provide additional assistence to you, if it is needed, so that do not hesitate to contact us in case any additional inquiries occur.
     
    Regards,
    Ivan Ivanov
    the Telerik team
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  14. Allen
    Allen avatar
    50 posts
    Member since:
    Mar 2011

    Posted 23 Apr 2012 Link to this post

    Thank you.   All of the properties on my viewmodel are public that I care about for using with the RPG e.g.

    public class vm : GalaSoft.ViewModelBase
    ..

    private string _blah = String.Empty;

    public string Blah
    {get
    {return _blah;}
    }
    {set
    {_blah = value;
    RaisePropertyChanged("Blah);
    }

    public vm()
    {

    Blah = Properties.Default.BlahUserWriteableProperty;

    ...
    ...
    ...
    // more properties from Properties.Default.....
    ...
    ...
    ...

    }

    public SaveProperties()
    {
    Properties.Default.BlahUserWriteableProperty= Blah;

    }
    ...
    ...


    so I want the RPG Item to be

    Item = vm;

    for which a property grid thing-me will be created for each public property.


     But I think you are telling me I need to do this:


    /// model

    public IList<object> PropertiesBasket {

     ClassA ClassAProperties;
     ClassB ClassBProperties;
     ClassC ClassCProperties;

    public PropertiesBasket()
    {
    ClassAProperties = new ClassA();
    ClassAProperties.Load();  

    ClassBProperties= new ClassB();
    ClassBProperties.Load();

    ClassCProperties = new ClassC();
    ClassCProperties.Load();


    etc. etc. etc. etc. for the set of user writeable Properties.Settings of interest (may or may not be all of them...)
    }



    }

    So nutshell:

    Create subclasses for each type of property in Properties.Settings
    Provide initialization method in the subclasses to load the settings from Properties.Default......
    Provide save method in the subclasses to persist the settings to Properties.Default......
    Create a  complex object made up of these sub classes
    Initialize the subclasses as the complex object is created
    Bind rpg control to the complex object.
    Magic ensues.



    Am I understanding this correctly?  This complex object seems a lot like a ViewModel to me..... particularly if it has additional methods or whatever.  That actually may be ideal because other views can bind to it that are for other purposes....

    I guess my point is there is an awful lot to do to use the rpg to just edit Properties.Default for user settings that are volatile.  But if it will work as I have sketched (badly)  then thank you.


  15. Ivan Ivanov
    Admin
    Ivan Ivanov avatar
    1128 posts

    Posted 26 Apr 2012 Link to this post

    Hello Allen,

    Please, excuse me for the late reply. Basically both approaches would be viable, but preparing a common view model class that exposes all of your items' properties would demand lots of additional effort  on your side compared to just binding the RadPropertyGrid to a collection of these items, relying on its internal logic to construct the view model on its own. Moreover, you would be able to be benefit from the alternating Union/Intersection property set modes. I would advise you to give it a try so that you could
     determine whether this is an appropriate solution for your case. Please, do not hesitate to contact us again if you have any further inquiries on this.

    Kind regards,
    Ivan Ivanov
    the Telerik team
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  16. Ivan
    Ivan avatar
    43 posts
    Member since:
    Nov 2013

    Posted 11 Nov 2013 Link to this post

    I have this problem, too.
    What i need is to set Visibility of a PropertyDefinition at runtime. For example i created 2 properties in PropertyGrid. One property is the type Visibility, another is the type string. When i select the first property as true, the second property should be shown and then man can edit the value of it.
    I tried to bind these two properties with ViewModel. But that dose not work. When i write the values hard coded in xaml. That works. But that will not be changed any more. I have also tried with binding a bool value and combining with a BooleanToVisibilityConverter. That dose not work either.
    Please give some suggestion, how do i resolve this problem. Thanks.
  17. Ivan Ivanov
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    Posted 11 Nov 2013 Link to this post

    Hi,

     I am attaching a sample project that illustrates how to achieve this.

    Regards,
    Ivan Ivanov
    Telerik
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  18. rick
    rick avatar
    6 posts
    Member since:
    Jan 2016

    Posted 16 Mar in reply to Ivan Ivanov Link to this post

    Hi Ivan, excuse me for posting my question on a dead thread. But I'm facing the same issue, and I get here.

    Your sample project works well. But my problem is that I cannot make my ViewModel as static resource since the view model is created at runtime. And I tried to bind Visibility Property as below, but it does not work. rpg is the name of the telerik:RadPropertyGrid. Would you please guide me how to work it out? Thanks in advance!

    <telerik:PropertyDefinition OrderIndex="3" Binding="{Binding Interval}" Description="Interval" Visibility="{Binding Path=Item.Periodically, ElementName=rpg, Converter={StaticResource bool2Visibility}}">

     

  19. Ivan Ivanov
    Admin
    Ivan Ivanov avatar
    1128 posts

    Posted 21 Mar Link to this post

    Hello Rick,

    I modified my initial project to respect the scenario when view model is generated at run-time. I am attaching it for your reference.

    Regards,
    Ivan Ivanov
    Telerik
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  20. rick
    rick avatar
    6 posts
    Member since:
    Jan 2016

    Posted 22 Mar in reply to Ivan Ivanov Link to this post

    Hi Ivan!

    Thanks for your reply. It works!

    And I notice that you implement this in code behind. So, I'm wondering if there is easy way to do this inside xaml?

  21. Ivan Ivanov
    Admin
    Ivan Ivanov avatar
    1128 posts

    Posted 24 Mar Link to this post

    Hello,

    I am afraid that no valid XAML only solution comes to my mind. The trick is that PropertyDefinitions are not visual elements and the derive from DependencyObject. The DependencyObject type provides data binding support, but it relies on explicitly set binding source. Thus not having it defined as a resource, which can be reference complicates things a lot. However, you can try using an attached behavior that modifies or load the property definition, as soon as the view model gets loaded. Indeed, it is not a pure xaml solution, but the code will be separate from the view's code-behind class.

    Regards,
    Ivan Ivanov
    Telerik
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  22. Stephen
    Stephen avatar
    1 posts
    Member since:
    Apr 2016

    Posted 07 Apr in reply to Ivan Ivanov Link to this post

    Hi Ivan,

    I used the approach in your example project RadGridView-WPF-AR-19. It works for setting the Visibility binding of my PropertyDefinitions from the code-behind, but there was a negative side-effect. In the case that the Visibility is set to false, all the bindings of the PropertyDefintions below seem to get mangled showing zeros and NaN rather than the values of their bound viewmodel properties.

    Please advise.

  23. Ivan Ivanov
    Admin
    Ivan Ivanov avatar
    1128 posts

    Posted 12 Apr Link to this post

    Hello Stephen,

    Is the described problem reproducible after modifying the original example project? If not, would it be possible for you to open a support ticket, which enables zip attachments and priority support. Sending a repro-project that illustrates the problem would help us a lot to pinpoint its source and suggest an appropriate solution.

    Regards,
    Ivan Ivanov
    Telerik
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