DevExpress WPF Expression Editor

DevExpress.Wpf.ExpressionEditor includes the DevExpress WPF Expression Editor. ExpressionEditorControl lets users compose and validate expressions with IntelliSense-style completion, a categorized list of fields and functions, and inline documentation.

dotnet add package DevExpress.Wpf.ExpressionEditor

Other DevExpress WPF packages reference this one to provide in-place expression editing:

• DevExpress WPF Data Grid uses it for unbound columns, conditional formatting rules, and filter criteria.
• DevExpress WPF Report Designer uses it for properties that accept expressions.

Key Features

• Editing Context: The Context property supplies fields, functions, and constants.
• Auto-Completion: An IntelliSense-style list suggests fields and functions as the user types.
• Validation: The Errors property reports syntax and semantic errors, and the editor highlights them in place.
• Templates: CustomEditorTemplate replaces the editing surface when an embedding control needs its own presentation.

Examples

Example: Host the Expression Editor

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:dxee="http://schemas.devexpress.com/winfx/2008/xaml/expressioneditor">

    <dxee:ExpressionEditorControl EditValue="{Binding Expression, Mode=TwoWay}"
                                  Context="{Binding EditorContext}" />
</Window>

In this configuration, the editor behaves as follows:

• Writes the composed expression back to the Expression property
• Offers fields and functions supplied by the bound context
• Reports syntax errors as users type

Evaluation Period, Pricing Options, and Licensing Terms

Whether you own a license or want to start a 30-day evaluation period, download and register your DevExpress license key. To obtain your key, log in to the DevExpress Download Manager. Use your existing DevExpress.com account or create a new account for free. For key registration instructions, see License Key for DevExpress Products.

If you purchase a license after evaluating a product, re-register your updated DevExpress license key to remove evaluation version warnings/messages.

This package is included in the following commercial subscriptions:

• DevExpress WPF Subscription
• DevExpress Reporting Subscription
• DevExpress DXperience Subscription
• DevExpress Universal Subscription

See DevExpress Subscriptions & Licensing for subscription comparison tables, purchasing FAQ, and licensing information.

Related Components/Packages

DevExpress.Wpf.Grid - The DevExpress WPF Data Grid, which uses this editor for unbound columns, formatting rules, and filters.

dotnet add package DevExpress.Wpf.Grid

DevExpress.Wpf.Reporting - DevExpress WPF reporting controls and the End-User Report Designer.

dotnet add package DevExpress.Wpf.Reporting

DevExpress.Wpf - The complete DevExpress WPF Control suite.

dotnet add package DevExpress.Wpf

Documentation

• Expression Editor
• ExpressionEditorControl Class Reference

Software Bill of Materials (SBOM)

To access SBOM files for DevExpress packages, please refer to the following article: Software Bill of Materials (SBOM) for DevExpress .NET assemblies/NuGet packages, JavaScript, VCL and other redistributable artifacts.

See Also: Information Security | Security - What You Need to Know

Useful Online Resources

• www.devexpress.com
• DevExpress Support Center
• DevExpress Blogs