Integrate JavaScript HTML Editor into a WinForms App

This example integrates the JavaScript WYSIWYG HTML Editor (a components that ships as part of DevExteme UI component suite) within a WinForms application. The client-side HTML Editor is embedded into the Microsoft Edge WebView2 control (DXHtmlEditorWebView).

HTML Editor Features

• HTML and Markdown Support
• HTML Editor features include:
• Inline and Block Formats
• Copy/Paste Rich Text Formatting
• Insert Media and Upload Images
• Tables
• Mail Merge
• UI Customization
• Light/Dark Themes

NOTE

• Using DevExpress JavaScript HTML Editor within your desktop application requires an active DevExtreme license.
• The DevExtreme HTML Editor does not support all HTML-related features and tags (read about limitations).

The example also implements the following:

• Auto-syncs the WinForms application skin with the HTML Editor’s theme. When switching from a dark to a light color palette (and vice versa), the corresponding theme (dark or light) is applied to the HTML Editor.
• Undo/Redo Ribbon commands allow users to revert or redo actions within the HTML Editor.

Use the HTML Editor in Your WinForms App

1. Copy the DXHtmlEditor folder to your project.
2. Install the Microsoft.Web.WebView2 NuGet package.
3. Open the DXHtmlEditorClient.cs file and specify the default namespace within the OnWebResourceRequested method:

   void OnWebResourceRequested(object sender, CoreWebView2WebResourceRequestedEventArgs e) {
    var environment = webView?.Environment;
    if(environment == null)
        return;
    string asset = $@"{nameof(MyDefaultNamespace)}.{nameof(DXHtmlEditor)}.Assets.{e.Request.Uri.Substring(rootURIFilter.Length - 1)}";
    // ...
   }

4. Set Build Action to "Embedded Resource" for all files in the Assets folder.
5. Build the solution.
6. Drop the DXHtmlEditorWebView component from the toolbox onto a form.

Files to Review

• DXHtmlEditorClient.cs
• DXHtmlEditorWebView.cs
• MainForm.cs
• index.js

See Also

Integrate the DevExtreme JavaScript HTML Editor into a WinForms Application (Blog Post)