.NETのニュース

リストボックスでユーザーの選択を簡素化

9月 30, 2025
事前定義された選択可能なオプションのセットをユーザーに提示することで、データの精度とUIの一貫性が向上

A listbox is a user interface component that displays a collection of items from which a user can select one or more options. It is commonly used in forms, settings panels, or data entry screens to present predefined values in a scrollable format. For developers, a listbox offers a simple way to enforce valid input by limiting user choices, reduces the need for manual data entry, and improves UI consistency across applications. It also supports keyboard and mouse interaction, which helps enhance accessibility and usability without requiring complex custom controls.

Several .NET WPF data editor collections provide listbox controls including:

  • Telerik UI for WPF Data Editors (part of Telerik UI for WPF) lets you embed a listbox that supports data binding, multiple selection and drag‑and‑drop reordering.
  • DevExpress WPF Data Editors (part of DevExpress WPF) allows you to use a listbox bound to a data source, enabling single or multi-selection with customizable display.
  • Actipro Editors for WPF provides a listbox control that supports virtualization, hierarchical item adapters, and custom rendering for high‑volume datasets.
  • NOV UI for .NET Data Editors (part of NOV UI for .NET Data Editors) allows you to incorporate a cross‑platform listbox with data binding and selectable items.

For an in-depth analysis of features and price, visit our .NET WPF Data Editors comparison.

Compare .NET WPF Data Editors Components

JSONネイティブアサーションでAPIテストを改善

9月 30, 2025
Fluent Assertions 8.7では、JsonNodeオブジェクトとJsonArrayオブジェクトの構造、型、値を直接検証するためのJSONネイティブアサーションを追加

Xceed Fluent Assertions, developed by Xceed Software, is a new .NET library designed to enhance the readability and maintainability of unit tests. It provides a fluent interface for expressing assertions, allowing developers to write more natural and expressive test code. Instead of relying on traditional, often convoluted assertion syntax, Xceed Fluent Assertions enables developers to chain together methods that clearly articulate the expected outcomes of their tests. This promotes a more declarative style of testing, making it easier to understand the intent and logic behind each test case.

The Fluent Assertions 8.7 update introduces JSON-native assertions with first-class JSON support, enabling developers to validate JSON payloads directly within their tests. This enhancement allows precise verification of structure, data types, and values on JsonNode and JsonArray objects without the need for manual parsing or custom helper methods. By treating JSON as a native element in the assertion framework, the update improves API and integration testing, improves test clarity, and reduces maintenance overhead associated with complex JSON comparisons.

To see a full list of what's new in v8.7, see our release notes.

Xceed Fluent Assertions is licensed per developer and is available as a perpetual license with 1 year of updates and support. See our Xceed Fluent Assertions licensing page for full details.

Xceed Fluent Assertions is available individually or as part of Xceed Ultimate Suite.

カスタムUIを使用してセキュアOTPエントリを追加

9月 29, 2025
Telerik UI for ASP.NET AJAX 2025 Q3は、ワンタイムパスワード(OTP)入力コントロールを追加し、検証による多要素認証を簡素化

Telerik UI for ASP.NET AJAX is a library of over 120 user interface components designed for developers building Web Forms applications on the ASP.NET AJAX framework. It provides a variety of pre-built and high-performant controls which are fully customizable, ranging from data management to layout, navigation and data visualization. This feature-rich suite allows for the creation of responsive and visually appealing web applications, whilst enabling developers to enhance the user experience and expedite the development process.

The Telerik UI for ASP.NET AJAX 2025 Q3 update introduces a new One-Time Password (OTP) Input control that enhances application security by improving the integration of multi-factor authentication. This control provides a dedicated interface for handling one-time password entries, ensuring a consistent and reliable verification process across applications. It is fully customizable in terms of size, style, and format, allowing alignment with existing application designs while maintaining strong protection against unauthorized access. This addition simplifies implementation for developers and supports secure workflows such as logins, password resets, and sensitive transactions.

To see a full list of what's new in 2025 Q3 (2025.3.812), see our release notes.

Telerik UI for ASP.NET AJAX is licensed per developer and has two licensing models: an annual Subscription License and a Perpetual License. The Subscription license provides access to the latest product updates, technical support, and exclusive benefits for a flat annual fee, and must be renewed to continue using the software. The Perpetual license is a one-time purchase granting access to the current released version and includes a one-year subscription for product updates and technical support. After this initial period, users can choose to renew the subscription element to continue receiving updates and support; otherwise, they may continue using the installed version available during their active subscription term but will forgo future updates and support. See our Telerik UI for ASP.NET AJAX licensing page for full details.

Telerik UI for ASP.NET AJAX is available individually or as part of the following products:

入力可能なPDF AcroFormsを使用してレポートをエクスポート

9月 29, 2025
レポートフィールドをインタラクティブなPDF AcroFormsとしてエクスポートすることで、簡単なデータ入力、一貫した書式設定、および幅広いPDFビューアの互換性を実現

Exporting reports to PDF with AcroForms enables reports to be saved as PDF files containing fully interactive form fields, rather than static text. Editable elements such as text boxes, checkboxes, radio buttons, and drop-down lists remain fillable after export, allowing users to complete forms directly in standard PDF viewers like Adobe Acrobat Reader - without the need for specialized software. The benefits are considerable: organizations can reduce manual data entry, maintain consistent formatting across distributed documents, and improve accessibility for end users. For instance, a company might export an invoice report with editable billing details, create a survey that recipients can fill out digitally, or generate compliance forms that clients can complete and return electronically. By embedding interactive fields directly into exported reports, AcroForms help make document workflows more efficient, accurate, and user-friendly.

Several .NET WPF reporting controls offer Export to PDF with AcroForms including:

  • DevExpress Reports (Multi-Platform) lets you export interactive PDFs with AcroForms, enabling editable fields across diverse devices and viewers.
  • ActiveReports.NET by MESCIUS allows you to create reports exported as AcroForm PDFs, supporting digital data entry, compliance, and improved form distribution.
  • List & Label Enterprise Reporting Edition by combit facilitates exporting fillable PDFs with AcroForms, preserving interactive fields for professional, user-friendly data collection.
  • FastReport .NET WPF enables generating reports as interactive AcroForm PDFs, combining dynamic layouts with editable fields for efficient digital workflows.

For an in-depth analysis of features and price, visit our comparison of .NET WPF reporting controls.

Compare .NET WPF Reporting Controls

Excel数式にカスタムロジックを追加

9月 26, 2025
EPPlus Software v8.2.0では、8つの新しいLAMBDAベースの関数のサポートが追加され、カスタム数式、動的配列、およびデータ変換が可能

EPPlus is a powerful and versatile .NET library for managing and manipulating Microsoft Excel files using the Office Open XML (OOXML) format. It is a lightweight and efficient library that is easy to use and can be integrated into a wide range of applications. It allows developers to create, read and modify spreadsheets without dependencies on any other library. Features include pivot tables, styling, VBA/Form controls, conditional formatting, charts, tables, formula calculation, data validation, pictures/shapes, and more.

The EPPlus v8.2.0 update introduces support for eight new LAMBDA-based functions, giving developers greater flexibility and control when working with Excel workbook calculations. With these additions, you can now define custom functions directly in the workbook, streamline array transformations, apply operations by row or column, and handle iterative or conditional logic more efficiently. This enhancement reduces the need for repetitive formulas or external code, enabling cleaner, more maintainable spreadsheets that better align with modern programming practices.

To see a full list of what's new in v8.2.0, see our release notes.

EPPlus is licensed per developer and is available as both perpetual licenses and subscription based licenses with periods of 1 year and 2 years, which include support and upgrades. See our EPPlus licensing page for full details.

For more information, see our EPPlus product page.