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  1. ASP.NET Core Runtime 3.1.32. The ASP.NET Core Runtime enables you to run existing web/server applications. On Windows, we recommend installing the Hosting Bundle, which includes the .NET Runtime and IIS support.

    • Overview
    • Partial class support for Razor components
    • Component Tag Helper and pass parameters to top-level components
    • Support for shared queues in HTTP.sys
    • Breaking changes for SameSite cookies
    • Prevent default actions for events in Blazor apps
    • Stop event propagation in Blazor apps
    • Detailed errors during Blazor app development

    This article highlights the most significant changes in ASP.NET Core 3.1 with links to relevant documentation.

    Razor components are now generated as partial classes. Code for a Razor component can be written using a code-behind file defined as a partial class rather than defining all the code for the component in a single file. For more information, see Partial class support.

    In Blazor with ASP.NET Core 3.0, components were rendered into pages and views using an HTML Helper (Html.RenderComponentAsync). In ASP.NET Core 3.1, render a component from a page or view with the new Component Tag Helper:

    The HTML Helper remains supported in ASP.NET Core 3.1, but the Component Tag Helper is recommended.

    Blazor Server apps can now pass parameters to top-level components during the initial render. Previously you could only pass parameters to a top-level component with RenderMode.Static. With this release, both RenderMode.Server and RenderMode.ServerPrerendered are supported. Any specified parameter values are serialized as JSON and included in the initial response.

    For example, prerender a Counter component with an increment amount (IncrementAmount):

    HTTP.sys supports creating anonymous request queues. In ASP.NET Core 3.1, we've added the ability to create or attach to an existing named HTTP.sys request queue. Creating or attaching to an existing named HTTP.sys request queue enables scenarios where the HTTP.sys controller process that owns the queue is independent of the listener process. This ...

    The behavior of SameSite cookies has changed to reflect upcoming browser changes. This may affect authentication scenarios like AzureAd, OpenIdConnect, or WsFederation. For more information, see Work with SameSite cookies in ASP.NET Core.

    Use the @on{EVENT}:preventDefault directive attribute to prevent the default action for an event. In the following example, the default action of displaying the key's character in the text box is prevented:

    For more information, see Prevent default actions.

    Use the @on{EVENT}:stopPropagation directive attribute to stop event propagation. In the following example, selecting the checkbox prevents click events from the child from propagating to the parent :

    For more information, see Stop event propagation.

    When a Blazor app isn't functioning properly during development, receiving detailed error information from the app assists in troubleshooting and fixing the issue. When an error occurs, Blazor apps display a gold bar at the bottom of the screen:

    •During development, the gold bar directs you to the browser console, where you can see the exception.

    •In production, the gold bar notifies the user that an error has occurred and recommends refreshing the browser.

    For more information, see Handle errors in ASP.NET Core Blazor apps.

  2. 12. Juli 2022 · This article describes what is new in .NET Core 3.1. This release contains minor improvements to .NET Core 3.0, focusing on small, but important, fixes. The most important feature about .NET Core 3.1 is that it's a long-term support (LTS) release.

  3. 3. Dez. 2019 · NET Core 3.1 is now ready to be used wherever your imagination or business need takes it. You can download .NET Core 3.1, for Windows, macOS, and Linux: .NET Core 3.1 SDK and Runtime. Docker container images. Snap installer. ASP.NET Core and EF Core are also being released today.

  4. 11. Aug. 2020 · .NET Core 3.1.7 release carries both security and non-security fixes. CVE-2020-1597 | NET Core Remote Code Execution Vulnerability. Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core. This advisory also provides guidance on what developers can do to update their applications to ...

  5. 1. März 2010 · Downloads. Includes the .NET Core and ASP.NET Core Runtimes. For hosting stand-alone apps on Windows Servers. Includes the ASP.NET Core Module for IIS and can be installed separately on servers without installing .NET Core runtime. The .NET SDK includes a matching updated .NET Runtime.

  6. 3. Dez. 2019 · NET Core 3.1 is a Long Term Support (LTS) release. Here’s what’s new in this release for ASP.NET Core: Partial class support for Razor components. Pass parameters to top-level components. New component tag helper. Prevent default actions for events in Blazor apps. Stop event propagation in Blazor apps. Detailed errors during Blazor app development.