This release updates only the .NET Core SDK to include work which was included in Visual Studio 15.4
Note: The 'Linux' binary archives are new for the 2.0 release. This package contains binaries which are compatible with Linux distros and versions supported by .NET Core.
Checksum files to verify downloads are available as follows:
Debug Symbols
Docker
Images for .NET Core 2.0.0 are available on Docker.
Installing .NET Core on LinuxUninstall any Preview versions
If you have .NET Core Previews installed, it will need to be removed before attempting to install .NET Core 2.0. This can be done by running a command such as the following.
sudo apt remove dotnet-dev-2.0.0-preview2-006497
Ubuntu and Debian based systems
Register the Microsoft key, the product repository for your distro and install required system dependencies with the following scripts.
Ubuntu 17.04Ubuntu 16.04 and Linux Mint 18Ubuntu 14.04 and Linux Mint 17Debian 9 (Stretch)Debian 8 (Jessie)
Then, update the package cache and install .NET Core
RHEL and Fedora based systems
Register the Microsoft key, the product repository for your distro and install required system dependencies with the following scripts.
Fedora, CentOS, Oracle LinuxSUSE Enterprise Linux and OpenSUSE
Then, update the package cache and install .NET Core
Fedora, CentOS and Oracle LinuxSUSE Enterprise Linux and OpenSUSE
Note: When installing the SDK, SUSE and OpenSUSE may report that nothing provides libcurl. libcurl should already be installed on supported versions of both distros. Run zypper search libcurl to confirm. The error will present 2 'solutions'. Choose 'Solution 2' to continue installing .NET Core.
Installation from a binary archive
Installing from the packages detailed above is recommended and you can also install from binary archive. When using binary archives to install, the contents must be extracted to a user location such as
$HOME/dotnet and a symbolic link created for dotnet . This is a change from previous versions of .NET Core. Additional details can be seen in .NET Core 2.0 Known Issues.
Server HostingWindows
If you are looking to host stand-alone apps on Windows Servers, the ASP.NET Core Module for IIS can be installed separately on servers without installing .NET Core runtime. You can download the Windows (Server Hosting) installer and run the following command from an Administrator command prompt:
Linux
On supported Linux systems, register the Microsoft Product feed as described above and install
dotnet-hosting-2.0.0 using your package manager.
ASP.NET Core Package Store
The Runtime Package Store is installed by the .NET Core SDK and the Windows Server Hosting installer. If you need to install the Runtime Package Store separately, the following can be used.
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By Scott Addie
This article explains how to update an existing ASP.NET Core 2.1 project to ASP.NET Core 2.2.
Prerequisites
Warning
If you use Visual Studio 2017, see dotnet/sdk issue #3124 for information about .NET Core SDK versions that don't work with Visual Studio.
Update Target Framework Moniker (TFM)
Projects targeting .NET Core should use the TFM of a version greater than or equal to .NET Core 2.2. In the project file, update the
<TargetFramework> node's inner text with netcoreapp2.2 :
Projects targeting .NET Framework may continue to use the TFM of a version greater than or equal to .NET Framework 4.6.1:
Adopt the IIS in-process hosting model
To adopt the in-process hosting model for IIS, add the
<AspNetCoreHostingModel> property with a value of InProcess to a <PropertyGroup> in the project file:
The in-process hosting model isn't supported for ASP.NET Core apps targeting .NET Framework.
For more information, see ASP.NET Core Module.
Update a custom web.config file
For projects that use a custom web.config file in the project root to generate their published web.config file:
For more information and example web.config files, see ASP.NET Core Module.
Update package references
If targeting .NET Core, remove the metapackage reference's
Version attribute in the project file. Inclusion of a Version attribute results in the following warning:
For more information, see Microsoft.AspNetCore.App metapackage for ASP.NET Core 2.1 or later.
The metapackage reference should resemble the following
<PackageReference /> node:
If targeting .NET Framework, update each package reference's
Version attribute to 2.2.0 or later. Here are the package references in a typical ASP.NET Core 2.2 project targeting .NET Framework:
If referencing the Microsoft.AspNetCore.Razor.Design package, update its
Version attribute to 2.2.0 or later. Failure to do so results in the following error:
Update .NET Core SDK version in global.json
If your solution relies upon a global.json file to target a specific .NET Core SDK version, update its
version property to the 2.2 version installed on your machine:
Update launch settings
If using Visual Studio Code, update the project's launch settings file (.vscode/launch.json). The
program path should reference the new TFM:
Update Kestrel configuration
If the app calls UseKestrel by calling
CreateDefaultBuilder in the CreateWebHostBuilder method of the Program class, call ConfigureKestrel to configure Kestrel server instead of UseKestrel in order to avoid conflicts with the IIS in-process hosting model:
If the app doesn't call
CreateDefaultBuilder and builds the host manually in the Program class, call UseKestrelbefore calling ConfigureKestrel :
For more information, see Kestrel web server implementation in ASP.NET Core.
Update compatibility version
Update the compatibility version in
Startup.ConfigureServices to Version_2_2 :
Update CORS policy
In ASP.NET Core 2.2, the CORS middleware responds with a wildcard origin (
* ) if a policy allows any origin and allows credentials. Credentials aren't supported when a wildcard origin (* ) is specified, and browsers will disallow the CORS request. For more information, including options for correcting the problem on the client, see the MDN web docs.
To correct this problem on the server, take one of the following actions:
Update Docker images
The following table shows the Docker image tag changes:
Change the
FROM lines in your Dockerfile to use the new image tags in the preceding table's 2.2 column.
Build manually in Visual Studio when using IIS in-process hosting
Visual Studio's Auto build on browser request experience doesn't function with the IIS in-process hosting model. You must manually rebuild the project when using in-process hosting. Improvements to this experience are planned for a future release of Visual Studio.
Update logging code
Recommended logging configuration code didn't change from 2.1 to 2.2, but some 1.x coding patterns that still worked in 2.1 no longer work in 2.2.
If your app does logging provider initialization, filtering, and configuration loading in the
Startup class, move that code to Program.Main :
For more information, see Logging in ASP.NET Core
Additional resources
.NET Core 2.2.5 comprises:
See the Release Notes for details about what is included in this update.
Note: If you are a Visual Studio user, there are MSBuild version requirements so use only the .NET Core SDK supported for each Visual Studio version. If you use other development environments, we recommend using the latest SDK release.
Master Asp.net Mvc Core 2.2 DownloadDownloads
DockerDownload Asp Net Core 2.2 Review
The .NET Core Docker images have been updated for this release. Details on our Docker versioning and how to work with the images can be seen in 'Staying up-to-date with .NET Container Images'.
Installing .NET Core on LinuxInstall using Snap
Snap is a system which installs applications in an isolated environment and provides for automatic updates. Many distributions which are not directly supported by .NET Core can use Snaps to install. See the list of distributions supported Snap for details.
After configuring Snap on your system, run the following command to install the latest .NET Core SDK.
sudo snap install dotnet-sdk --classic
When .NET Core in installed using the Snap package, the default .NET Core command is
dotnet-sdk.dotnet , as opposed to just dotnet . The benefit of the namespaced command is that it will not conflict with a globally installed .NET Core version you may have. This command can be aliased to dotnet with:
sudo snap alias dotnet-sdk.dotnet dotnet
Note: Some distros require an additional step to enable access to the SSL certificate. If you experience SSL errors when running
dotnet restore , see Linux Setup for a possible resolution.
Install using a Package Manager
Before installing .NET, you will need to register the Microsoft key, register the product repository, and install required dependencies. This only needs to be done once per machine. Refer to Setting up Linux for .NET Core for the requirements.
The commands listed below do not specifically incude package managers to help with readability. Here are the package managers typically used by the Distros on which .NET Core is supported.
Develop applications
To develop applications using the .NET Core SDK, run the following command. The .NET Core runtime and ASP.NET Core runtime are included.
Run applications
If you only need to run existing applications, run the following command. The .NET Core runtime and ASP.NET Core runtime are included.
Installation from a binary archive
Installing from the packages detailed above is recommended or you can install from binary archive, if that better suits your needs. When using binary archives to install, the contents must be extracted to a user location such as
$HOME/dotnet , a symbolic link created for dotnet and a few dependencies installed. Dependency requirements can be seen in the Linux System Prerequisites document.
.NET Core Runtime-only installation
If only the .NET Core Runtime is needed, install
dotnet-runtime-2.2 using your package manager. If you also need ASP.NET Core functionality, installing aspnetcore-runtime-2.2 will install both the ASP Runtime and .NET Core Runtime.
Windows Server Hosting
If you are looking to host stand-alone apps on Servers, the following installer can be used on Windows systems.
Windows
You can download the Windows Server Hosting installer and run the following command from an Administrator command prompt:
This will install the ASP.NET Core Module for IIS.
In MVC, we have used following code to download a file. In ASP.NET core, how to achieve this?
Pascalz
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Download Asp Net Core 2.2 For Windows 7BALA MURUGANBALA MURUGAN
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5 Answers
Your controller should return an
IActionResult , and use the File method, such as this:
MétouleMétoule
You can try below code to download the file. It should return the XamDevXamDev
FileResult
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Example for Asp.net Core 2.1+ (Best practice)
Startup.cs:
SomeService.cs:
Controller will return
IActionResult
Make MakeluvMake Makeluv
Create a Service say FileService.
Add a method to FileService MimeType of the file
Now add a method to download File,
Now add controller method and call GetFile method in FileService,
20B220B2
A relatively easy way to achieve this is to use the built-in PhysicalFile result, which is available to all controllers: MS Docs: PhysicalFile
A simple example:
Now of course you should never expose this kind of API, due to security concerns.
I typically shield the actual file paths behind a friendly identifier, which I then use to lookup the real file path (or return a 404 if an invalid ID was passed in), ie:
For those that are curious, the MimeTypes helper is a great little nuget package from the folks at MimeKit
RMDRMD
Not the answer you're looking for? Browse other questions tagged asp.net-core or ask your own question.
.NET Core 2.2.5 is available for download and usage in your environment. This release includes .NET Core 2.2.5, ASP.NET Core 2.2.5 and updates to the .NET Core SDK.
Note: If you are a Visual Studio user, there are MSBuild version requirements so use only the .NET Core SDK supported for each Visual Studio version. If you use other development environments, we recommend using the latest SDK release.
We've created an issue at dotnet/core #2727 for your questions and comments.
Downloads
Docker Images
The .NET Core Docker images have been updated for this release. Details on our Docker versioning and how to work with the images can be seen in 'Staying up-to-date with .NET Container Images'.
The following repos have been updated
Azure AppServices
.NET Core Lifecycle News
Ubuntu 14.04 reached the end of standard support April 2019. We will no longer produce and release packages for this OS version.
.NET Core 1.0 and 1.1, which entered 'Maintenance' support status when 2.1 was declared LTS, will be end-of-life June 27, 2019. Updates for the 1.0 and 1.1 channels will no longer be offered after that date. See .NET Core Support Policy to learn more about the .NET Core support lifecycle.
See .NET Core Supported OS Lifecycle Policy to learn about Windows, macOS and Linux versions that are supported for each .NET Core release.
Changes in 2.2.5
.NET Core 2.2.5 release carries both security and non-security fixes.
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET Core 1.0, 1.1, 2.1 and 2.2. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A denial of service vulnerability exists when .NET Core improperly process RegEx strings. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET application.
A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to a .NET Core application.
The update addresses the vulnerability by correcting how .NET Core applications handle RegEx string processing.
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET Core and ASP.NET Core 1.0, 1.1, 2.1 and 2.2. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A denial of service vulnerability exists when .NET Core and ASP.NET Core improperly handle web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET Core and ASP.NET Core application. The vulnerability can be exploited remotely, without authentication.
A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to a .NET Core application.
The update addresses the vulnerability by correcting how .NET Core and ASP.NET Core web applications handle web requests.
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET Core and ASP.NET Core 1.0, 1.1, 2.1 and 2.2. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A denial of service vulnerability exists when .NET Core and ASP.NET Core improperly handle web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET Core and ASP.NET Core application. The vulnerability can be exploited remotely, without authentication.
A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to a .NET Core application.
The update addresses the vulnerability by correcting how .NET Core and ASP.NET Core web applications handle web requests.
Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core 2.1 and 2.2. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
Microsoft is aware of a denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application. The vulnerability can be exploited remotely, without authentication.
A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core application.
The update addresses the vulnerability by correcting how the ASP.NET Core web application handles web requests.
Additional fixes in this releasePackages updated in this release:
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