WPF — Early Access Preview (v20.2)

WPF Team Blog
25 August 2020

As you may know by now, we are a few months away from our next major release (v20.2). In this post, I’ll summarize some of the WPF-related features/capabilities we expect to ship in November.

If you own an active DevExpress Universal or DXperience Subscription, you can download and install our v20.2 Early Access Preview (EAP) today. Visit the DownloadManager page to obtain the EAP build.

And please remember - your feedback matters. Once you’ve installed the EAP and had the opportunity to explore its capabilities, reach out to us via the DevExpress Support Center and tell us how we can improve our implementation and better serve your business needs going forward.

Early Access and CTP builds are provided solely for early testing purposes and are not ready for production use. This build can be installed side by side with other major versions of DevExpress products. Please backup your project and important data before installing Early Access and CTP builds.

Perhaps most importantly, this EAP may not include all features/products we expect to ship in our v20.2 release cycle. We are working hard to finalize all v20.2 features/capabilities and once we have more information to share, we’ll post updates on this channel.

Table of Contents

WPF Data Grid and TreeList

Filter Panel Enhancements

We enabled our new Filter Panel by default. This panel highlights individual field names, field values, and date-time functions to help improve filter expression readability/usability.

If your WPF Data Grid displays detail views, the Filter Panel indents expressions so they visually correspond to individual detail views.

We also changed colors used within our Filter Editor - they now mirror Filter Panel colors.

Demo Documentation

Disabled and Read-Only Cells

Our WPF Data Grid and WPF TreeList allows you to disable cells or mark them as read-only (based on a specific condition). Use the BaseColumn.IsEnabledBinding and BaseColumn.IsReadOnlyBinding properties to associate the cell state with a property in the data source.

GitHub Example Documentation

Bulk Updates

We added AddRange methods so you can add multiple columns, summaries, and conditional formats as needed. AddRange updates the WPF Data Grid or TreeList once all relevant items have been added. With this new feature, you no longer need to enclose changes within BeginUpdate and EndUpdate method calls.


WPF Gantt

Print and Export

This release extends the print/export capabilities of our WPF Gantt control. You can now print and export both the Gantt TreeList and the Gantt Timeline.

Demo Documentation

WPF Scheduler

Updated TimelineView

We updated the look and feel of our WPF Scheduler's TimelineView. The redesign features dynamic time scales, per-pixel horizontal scrolling, and improved zoom operations. You can switch between the previous implementation and our new design by setting the TimelineView.ViewMode property.

Demo Documentation

Fetch Data-On-Demand

You can now handle our new DataSource.FetchAppointments event to load data for a specific date range and resource set. The DevExpress WPF Scheduler caches loaded data to reduce the number of requests.

public void FetchAppointments(FetchDataEventArgs args) {
    using(var dbContext = new DbContext()) {
        args.Result = dbContext.AppointmentEntities
            .Where(x => x.QueryStart <= args.Interval.End
                && x.QueryEnd >= args.Interval.Start)  || 
                (x.Start <= args.Interval.End && x.End >= args.Interval.Start))

Demo Documentation

Horizontal Scroll Operations

You can scroll the WPF Scheduler horizontally via the Shift+Mouse scroll wheel. If your mouse wheel has tilt buttons, you can also scroll by moving the wheel side to side.

WPF Diagram

SVG Export

The WPF Diagram control now supports vector (SVG) file export.


Measure Units

You can enable the DiagramControl.ShowMeasureUnit option to display measure units in the Properties Panel, Page Setup Window, and Bottom Panel. In addition to pixels (used by default), users can specify values in other measurement units (inches and millimeters).



  • This update includes a new OrgChartLayoutIsCompact option for the Org Chart's automatic layout. Set this option to false to calculate the offset for all tip-over subtrees rather than individual levels of the hierarchy. This improves readability for diagrams with extensive use of subtrees.
  • You can now hold the middle mouse button and drag to pan the diagram. The AllowMiddleButtonDrag option allows you to disable this behavior.

WPF Pivot Grid

Filter Panel Enhancements

We enabled our new Filter Panel by default. This panel highlights individual field names, field values, and date-time functions to help improve the filter expression readability/usability.

Demo Documentation

WPF Gauges

Template for Custom Labels

Our WPF Gauge control allows you to generate custom labels from a template. Use the Scale.CustomLabelsSource and Scale.CustomLabelTemplate properties as needed.

<Style TargetType="{x:Type dxga:ArcScale}">
    <Setter Property="CustomLabelsSource" Value="{Binding RomanLabels}"/>
    <Setter Property="CustomLabelTemplate">
                <dxga:ScaleCustomLabel Value="{Binding Hour}"
                                       Content="{Binding RomanHour}"
                                       Visible="{Binding Visible}"/>

Demo Documentation

Snap Indicator Values to Tickmarks

Set the ValueIndicatorBase.SnapMode property to MinorTickmarks / MajorTickmarks to integrate this capability in your WPF app. Once set, the WPF Gauge control will snap its value to minor or major tickmarks.

Demo Documentation

WPF Docking

You can now use the FloatGroup.WindowStyle and FloatingPaneWindow.OverlapTaskbar properties to specify whether a maximized FloatGroup overlaps the Windows Taskbar.

<dxdo:DockLayoutManager FloatingMode="Desktop">
	<dxdo:FloatGroup xmlns:platform="http://schemas.devexpress.com/winfx/2008/xaml/docking/platform">
	        <Style TargetType="platform:FloatingPaneWindow">
	            <Setter Property="OverlapTaskbar" Value="True"/>



The EnumItemsSourceBehavior's ImageSize property allows you to specify an item's image size.

        <dxmvvm:EnumItemsSourceBehavior EnumType="{x:Type common:UserRole}" 


WPF Themes

Predefined Palettes for VS2019 Themes

We added the following predefined palettes to our VS2019 themes:

Palette Name Supported Theme
Latte VS2019Blue
Navy VS2019Blue
BlueberryCake VS2019Dark
DeepSea VS2019Dark
Dimmed VS2019Dark
Sand VS2019Dark
Storm VS2019Dark
Berberis VS2019Light
Cornflower VS2019Light
EmeraldSea VS2019Light
LightLilac VS2019Light
Loft VS2019Light


Your Feedback Matters

We realize beta-testing is a time consuming process and we are grateful to those who invest time with our preview builds. Find the current implementation lacking flexibility? Feel we've overlooked a valuable usage scenario? Does our current implementation fail to address your business requirements? Please post your thoughts in the comment section below or create a Support Center ticket. We will happily follow-up and do what we can to extend the capabilities of our new products/features.

Free DevExpress Products – Get Your Copy Today

The following free DevExpress product offers remain available. Should you have any questions about the free offers below, please submit a ticket via the DevExpress Support Center at your convenience. We’ll be happy to follow-up.
Stephen J White
Stephen J White

Hi Eugene,

While this doesn't look as extensive as 20.1, I still can say I'm liking what is in store for 20.2. The read only cell change for the grid is something that I've been wanting for a couple of years now, so take heart knowing that's appreciated.

On the themes, I am surprised you haven't added a black and green one like the Witch Rave palette from Winforms. It's not a big deal though, since I was able to make a WPF version of Witch Rave using the theme designer to use with the Visual Studio 2017 and 2019 dark themes. On that note, do you know if there will be any significant changes to the Theme Designer for 20.2? 

And last but not least, do you know if there are any other significant changes for WPF in 20.2 that are still a WIP? 

27 August 2020
Tavares André
Tavares André


It would be great to have the same Year View in Scheduler Control like the one in Winform 



27 August 2020
Cyber Sinh
Cyber Sinh


Are you working on a code editor control?

If so, what is the target release date?

Thanks !


28 August 2020
Alex Chuev (DevExpress)
Alex Chuev (DevExpress)
Thanks a lot for your feedback. For WPF themes, we expect to release a mechanism that helps you preload theme resources to make further transitions and navigation actions within your app smoother.
A number of other features were not included in this preview but are planned for v20.2. The most prominent of these are UI testing support, design-time enhancements for .NET Core, and a new TreeView control. Please stay tuned for our announcements in the coming weeks.

A WPF Year View is not planned for v20.2, but we'll definitely add this to our 2021 Roadmap survey to gauge interest.

We decided not to implement a Code Editor control in 2020 and focused on other enhancements across our product line.
28 August 2020
A Code Editor control also for WinForms would be great
31 August 2020
Stephen J White
Stephen J White

That sounds awesome, I'll definitely keep watching for the news. Thanks again for all the hard work you and the rest of your team put into the WPF suite! 
31 August 2020
Erik Damgaard 1
Erik Damgaard 1
It would be great to have a theme, that is optimized for WTS  (terminal server)
12 October 2020
Michael Ch (DevExpress Support)
Michael Ch (DevExpress Support)
@Erik, thank you for sharing your thoughts. Unless I am mistaken, your suggestion is coming from the ticket that you recently posted: WPF Application Experience slowness or UI Freeze. Let's continue our conversation there.
14 October 2020

Please login or register to post comments.