I am making a test app to measure the loading speed of Windows DataGrid vs RadGrid. In the app I was binding Data Tables and Collections into DataGrid and RadGrid. Binding to the Windows DataGrid I would see and average time of 5ms for DataTables and 1.5ms for Collections. When you bind to RadGrid I get 200-400ms regardless of the type. Any ideas?

<telerik:RadBusyIndicator IsBusy="{Binding Path=IsBusy}">
        <Grid DataContext="{Binding Telerik, Source={StaticResource Locator}}">

            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="*"/>
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>
            <Grid.Resources>
                <Style TargetType="DataGrid">
                    <Setter Property="HorizontalAlignment" Value="Stretch"/>
                    <Setter Property="VerticalAlignment" Value="Stretch"/>
                    <Setter Property="Margin" Value="10"/>
                </Style>
                <Style TargetType="Button">
                    <Setter Property="Width" Value="75"/>
                    <Setter Property="HorizontalAlignment" Value="Center"/>
                    <Setter Property="VerticalAlignment" Value="Center"/>
                    <Setter Property="Margin" Value="10"/>
                </Style>
                <Style TargetType="TextBlock">
                    <Setter Property="Width" Value="75"/>
                    <Setter Property="HorizontalAlignment" Value="Center"/>
                    <Setter Property="VerticalAlignment" Value="Center"/>
                    <Setter Property="Margin" Value="10"/>
                </Style>
                <Style x:Key="TextLabel" TargetType="TextBlock">
                    <Setter Property="HorizontalAlignment" Value="Right"/>
                    <Setter Property="VerticalAlignment" Value="Center"/>
                    <Setter Property="Margin" Value="2"/>
                    <Setter Property="FontWeight" Value="Bold"/>
                </Style>
                <Style x:Key="ToolBarImage" TargetType="Image">
                    <Setter Property="Width" Value="20"/>
                    <Setter Property="Height" Value="20"/>
                    <Setter Property="Margin" Value="1"/>
                </Style>
            </Grid.Resources>
            <ToolBarTray>
                <ToolBar>
                    <Button Command="{Binding ExitCommand}"  ToolTip="Home">
                        <Grid>
                            <Image Source="{StaticResource Home}" Style="{StaticResource ResourceKey=ToolBarImage}"/>
                        </Grid>
                    </Button>
                    <Button Command="{Binding DataCommand}"  ToolTip="Execute" >
                        <Grid>
                            <Image Source="{StaticResource Play}" Style="{StaticResource ResourceKey=ToolBarImage}"/>
                        </Grid>
                    </Button>
                    <Button Command="{Binding ResetCommand}"  ToolTip="Reset">
                        <Grid>
                            <Image Source="{StaticResource Reset}" Style="{StaticResource ResourceKey=ToolBarImage}"/>
                        </Grid>
                    </Button>
                    <Separator/>
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Text="Execution Time:" Style="{StaticResource TextLabel}"/>
                        <TextBlock Text="{Binding TimeElapsed, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay, StringFormat={}{0:F3} ms}"/>
                    </StackPanel>
                    <Separator/>
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Text="Average Time:" Style="{StaticResource TextLabel}"/>
                        <TextBlock Text="{Binding AvgTimeElapsed, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay, StringFormat={}{0:F3} ms}"/>
                    </StackPanel>
                    <Separator/>
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Text="Times executed: " Style="{StaticResource TextLabel}"/>
                        <TextBlock Text="{Binding ExecutedNum, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"/>
                    </StackPanel>
                </ToolBar>
            </ToolBarTray>
            <telerik:RadGridView Grid.Row="1" Grid.Column="0" ItemsSource="{Binding MoldData}" Name="dataGridView1"/>
            
        </Grid>
    </telerik:RadBusyIndicator>

Hi,
I am using RadTreeView to display the hierarchy such as folders/subfolders and items within them. I have implemented template and style selectors according to the treeview item type But in case that I have a lot of folders (100+) with items in it (10+ items per folder) it take to much time to bind that on UI.
NOTE: folders are expanded by default.
I checked my data access layer and results are retrieved from the database in a decent time, so seems to me that the issue is just on UI side. I checked whether virtualization is working,check the live tree view and saw that there is ~20 folders loaded, even though, according to the current window(container) size there can be visible just 2 expanded folders with their items on the viewable area, so I was suspecting that this could be a cause of some delays because event virtualization is working, tree view loads much more elements than it could display.

Is there any way to handle this?

Also, whenever UI is refreshed I can see in my log exception like:
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.ItemsControl', AncestorLevel='1''. BindingExpression:Path=HorizontalContentAlignment; DataItem=null; target element is 'ListBoxItem' (Name=''); target property is 'HorizontalContentAlignment' (type 'HorizontalAlignment')

I figured out that it throwing this exception takes some amount of time. I checked the styles and tried to update all suspicious places in code but still getting the same error, so maybe I do not understand the real meaning of that exception. Any thoughts on this error?

                    Chart.Series.Add(new LineSeries
                    {
                        CategoryBinding = binding,
                        ValueBinding = ...,
                        StrokeThickness = 1,
                        Stroke = ...,
                        ItemsSource = vm.Datas,
                        TrackBallInfoTemplate = // difficult to create
                    }); 

 

TrackBallInfoTemplate is difficult to create, how can i only set a stringformat to use trackballinfo

Hello,

I have some of GridViewCheckBoxColumn and GridViewComboBoxColumn that bound to nested property which works perfectly. But when I try to use ExportToXlsx() to export into excel file, result from every columns that bound to nested property are different.

GridViewCheckBoxColumn bound to nested property yields True/False instead of TRUE/FALSE and GridViewComboBoxColumn yields selected value instead of display value which I preferred display value.

Is there anyway to make all columns regardless of nested property binding to be exported in the same format?

 

Here's my sample code

 

Thanks

Hi,

 

I have a huge amount of data, which I don't want to load all into the gridview.

I want to have the following scenario: The user applies filter with the default filtering control. The ViewModel get the FilterDescriptor and request the filtered Data at the DataService. The GridView shows the received data.

I don't want to use the filter for filtering the data bound to the gridview, I want to use it to request filtered data.

 

Moritz

I've modified the AppointmentItemHorizontalControlTemplate template to include a popup like so:

 

The popup shows as expected, however when I try to selected something on the popup by holding down the left mouse button, a drag effect is initiated beneath it that is trying to move the appointment into another slot (e.g when using the Month View definition). Unfortunately no event is received in the popup until after the drag effect is initiated.

 

Is there are a way to cancel the drag effect of the schedule view when the user is interacting with a popup?

now the fluent theme use the Aero effect,the background is too clear,

the Acrylic effect is better!

there is a opensource project: https://github.com/sourcechord/FluentWPF

the principal code:

     internal enum AccentState
    {
        ACCENT_DISABLED = 0,
        ACCENT_ENABLE_GRADIENT = 1,
        ACCENT_ENABLE_TRANSPARENTGRADIENT = 2,
        ACCENT_ENABLE_BLURBEHIND = 3,
        ACCENT_ENABLE_ACRYLICBLURBEHIND = 4,
        ACCENT_INVALID_STATE = 5
    }

   accent.GradientColor = 0x00FFFFFF;

  

Hello,

A multi-selection RadComboBoxis integrated into a cell of a RadGridView in the project that is attached.

The problem I have when trying to add a handle to an event to customize the loading of the multiple values of the RadComboBox.

This code does not work ...

FrameworkElementFactory dateFactory = new FrameworkElementFactory (typeof (RadComboBox), "Target");
dateFactory.SetValue (RadComboBox.AllowMultipleSelectionProperty, true);
dateFactory.SetValue (RadComboBox.ItemsSourceProperty, new List <string> {"DBF", "REP"});

                 // Add handler not rule
                 RoutedEventHandler handler = new RoutedEventHandler (LoadedTarget_RadComboBox);
                 dateFactory.AddHandler (RadComboBox.LoadedEvent, handler, true);


On the other hand, if I add the handler outside of a Grid it works correctly

Thanks in advance.

[I'm attaching the test project code concerning the problem]

we are using 2 RadTreeview in of our form in WPF application.

we got a requirement that one RadTreeView will have  only one parent folder like Favoirites.

so whenever any folder is selected by user in another RadTreeview ,then that folder must be added in Favoirites

 

Ex:

RadTreeView1

 Favourites

  --->MyFolder

RadTreeView2

Categories

-->MyFolder

At first Favourites will be empty and when user will select MyFolder it will be getting added into Favourites.

 

Please help me.

 

 

 

How can I force data-grid refresh on the Outlook Template for VS2018?

 

At this moment, when I make a change on the cell, I need to close the group and open the group to see the changes.

I am using observablecollection and INotifyPropertyChanges.

 

I saw in some forum that I can force the grid to update, I want to do this with a button which calls on a command function from the command file in the template.

e.g.   DataGridName.Item.Refresh();

But it seems like I can't find the reference to the datagrid at all.