Released: Dec 18, 2025

25.2 での更新項目

機能

• .NET 10 and Visual Studio 2026 Support - DevExpress WinForms component libraries now support .NET 10 and Visual Studio 2026.
• JetBrains Rider Support - You can now visually configure and customize major DevExpress UI components directly within Rider's designer.
• Project Templates for JetBrains Rider - The DevExpress Template Kit is fully integrated into JetBrains Rider. You can create new projects using the same rich set of DevExpress templates available in Visual Studio and VS Code.
• DateOnly and TimeOnly Support in Charts - The DevExpress WinForms Chart Control supports .NET DateOnly and TimeOnly data types. You can use these types to specify arguments, values, workday/work time options, strips, constant lines, and scale breaks, as well as to apply data filters, sorting, and summaries.
• Accessibility
  • Accessible Column and Band Operations Through Keyboard Input - The DevExpress WinForms Data Grid includes full keyboard access to column headers and bands.
  • Screen Reader Enhancements for Data Editors - DevExpress WinForms Data Editors ship with improved screen reader support for text-based editors. Users can navigate and select text more effectively within the range read by the screen reader.
• AI Chat Control
  • Manage Multiple Chat Clients - The DevExpress WinForms AI Chat Control supports use of multiple AI services within a single application.
  • Resources - The WinForms AI Chat Control can now access external data sources (such as MCP (Model Context Protocol) servers) or dynamically generated content through resources. Resources extend the chat context with additional input (for example, local documents, logs, or images). The AI model uses this data to generate more accurate and context-aware responses.
  • Tool Calling API - AI Tool Calling connects your Windows Forms application logic with natural language input. The WinForms AI Chat Control can invoke methods annotated with metadata that describes purpose, input parameters, and optional target objects.
  • Display Tool Information - You can display information about invoked tools in chat responses. Enable the AI Chat Control's IncludeFunctionCallInfo option to include metadata about invoked tools/functions (function names and arguments) in response messages.
  • Message Templates - You can create Razor-based templates for messages, prompt suggestions, and empty chat area to customize the DevExpress WinForms Chat UI.
  • Title and Clear Chat Button - The WinForms AI Chat Control can display a header. The header contains a customizable chat title and a "Clear Chat" button (removes all messages from the conversation history except system messages).
  • Resize Input Area - Enable the new AIChatControl.AllowResizeInput option to allow users resize the input area. Users can drag the top edge to enlarge the input area or down to display a more detailed chat history.
  • Send Prompt Suggestion on Click - The AI Chat Control automatically inserts the selected prompt suggestion into the chat prompt box so users can edit it before sending. Activate the new PromptSuggestion.SendOnClick option to send a prompt suggestion to an AI service immediately after it is clicked and accelerate conversation flows.
  • Chat Project Templates DevExpress Template Kit - The DevExpress Template Kit includes new chat-based project templates for apps targeting .NET 8+.
• AI-powered Extensions
  • Prompt to Expression - Added AI-powered expression generation to the WinForms controls to help users create filter and unbound column expressions for data-aware WinForms controls using natural language prompts. Instead of writing complex expressions, users describe the desired logic in plain text.
  • SmartPaste in WinForms Scheduler Control - The DevExpress WinForms Scheduler Control supports AI-powered SmartPaste. Users can create appointments by pasting text or images from the clipboard. SmartPaste identifies the subject, date, time, location, agenda, and fills appointment fields.
  • SmartPaste AI-powered Image Processing - v25.2 extends SmartPaste to process clipboard images.
  • Prompt Augmentation - DevExpress AI Assistant and SmartPaste extensions support Prompt Augmentation. Use the AI-powered behavior's PromptAugmentation property to supply additional instructions that modify the default prompt (for example, always translate results into English).
  • Flexible Text Selection for AI-powered Features - AI-powered text processing features rely on relevant and contextually complete input to generate high-quality results. In earlier versions, users could only send explicitly selected text to the AI service, which limited flexibility and often required extra manual steps.
  • Generate Skin Palettes with AI - The new demo application leverages AI to create custom skin palettes to personalize an application's appearance on the fly. Users can generate, save, and delete AI-created palettes between application sessions.
• Outlook-inspired Side Panel
  • The DevExpress WinForms Ribbon Form can display a side navigation or status panel (Microsoft Outlook inspired).
• Data Grid & TreeList
  • Multi-Cell Editing - The WinForms Data Grid and TreeList controls ship with multi-cell editing support (users can apply identical values to multiple cells simultaneously). This capability will be useful when working with large datasets or when applying the same change (for example, updating a status, category, or date) across multiple rows.
• Accordion Control
  • Search with a Delay - You can filter WinForms Accordion Control items with a delay. Use the FilterDelay property to specify the delay in milliseconds.
• SVG Icon Colorization
  • CSS Variables - You can now dynamically align SVG icon colors with the current application skin.
• Rich Text Editor
  • Mail Merge Enhancements Merge Data with Detail Regions - The mail merge engine used within the DevExpress WinForms Rich Text Editor supports nested regions. You can merge data with any number of hierarchical levels (master-detail-subdetail and beyond) within a single template. Existing MailMerge methods work for both single-level and multi-level documents, no additional settings/toggles required.
• Spreadsheet Control
  • Extended OLE Object Support - DevExpress WinForms Spreadsheet allows you to import/export linked and embedded OLE Objects in binary Excel formats (XLS and XLSB). You can create, edit, or remove OLE objects in Excel documents and save these document to binary formats without content loss.