ASP.NET Core and Blazor updates in .NET Core 3.0 Preview 9

for additional details and known issues.

Get started

To get started with ASP.NET Core in .NET Core 3.0 Preview 9 .

.NET Core 3.0 Preview 9 requires Visual Studio 2019 16.3 Preview 3 or later.

To install the latest Blazor WebAssembly template also run the following command:

dotnet new -i Microsoft.AspNetCore.Blazor.Templates::3.0.0-preview9.19424.4

Upgrade an existing project

To upgrade an existing ASP.NET Core app to .NET Core 3.0 Preview 9, follow the in ASP.NET Core 3.0.

To upgrade an existing ASP.NET Core 3.0 Preview 8 project to Preview 9:

• Update all Microsoft.AspNetCore.* package references to 3.0.0-preview9.19424.4


• In Blazor apps and libraries:
  
  
  
  • Add a using statement for Microsoft.AspNetCore.Components.Web in your top level _Imports.razor file (see below for details).
  
  
  • Update App.razor to use the updated Router component (see below for details).
  
  
  • Replace uses of IUriHelper with NavigationManager.
  
  
  • Remove any use of @ref:suppressField.
  
  
  • Replace the previous RevalidatingAuthenticationStateProvider code with the new RevalidatingIdentityAuthenticationStateProvider code from the project template.
  
  
  • Replace Microsoft.AspNetCore.Components.UIEventArgs with System.EventArgs and remove the “UI” prefix from all EventArgs derived types (UIChangeEventArgs -> ChangeEventArgs, etc.).
  
  
  • Replace DotNetObjectRef with DotNetObjectReference.
  
  
  
  


• In gRPC projects:
  
  
  
  • Update calls to GrpcClient.Create with a call GrpcChannel.ForAddress to create a new gRPC channel and new up your typed gRPC clients using this channel.
  
  
  • Rebuild any project or project dependency that uses gRPC code generation for an ABI change in which all clients inherit from ClientBase instead of LiteClientBase. There are no code changes required for this change.
  
  
  • Please also see the blog post. While this work won’t ship with .NET Core 3.0, we’d still love to get your feedback early in the design process. Take a look at the .
    
    

    Thanks for trying out ASP.NET Core and Blazor!

    
    

    The post .

    
    
    Vollständiger Original-Bericht

    Ausführliche Details, Code-Beispiele & Hersteller-Stellungnahme auf devblogs.microsoft.com.

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