.NET의 새로운 바인드 한정자를 이용해서 Blazor 애플리케이션 간소화 | Jon Hilton

dimohy · 1월 17, 2023, 4:28오후

.NET 7 부터 Blazor에서 @bind:after 및 @bind:get @bind:set을 이용해서 바인딩 후의 처리를 좀 더 쉽게 할 수 있습니다.

dimohy · 1월 17, 2023, 4:42오후

관련 기능은 최신 Visual Studio 2022 환경에서 오동작을 하는 것으로 보입니다. 2월에 예정된 VS 업데이트에서 수정될 예정이라고 합니다.

github.com/dotnet/aspnetcore

Blazor @bind:after not working on .NET 7 RTM release

opened 12:57AM - 09 Nov 22 UTC

closed 02:14PM - 15 Dec 22 UTC

iphdav

area-blazor known-issue

### Is there an existing issue for this? - [X] I have searched the existing iss…ues ### Describe the bug Cleanly installed VS 17.4, which installed .NET 7: dotnet --list-sdks 7.0.100 [C:\Program Files\dotnet\sdk] Attempting to run example component: ``` @page "/" <input @bind="searchText" @bind:after="PerformSearch" /> @code { string searchText; async Task PerformSearch() { // ... do something asynchronously with 'searchText' ... } } ``` Project file: ``` <Project Sdk="Microsoft.NET.Sdk.Web"> <PropertyGroup> <TargetFramework>net7.0</TargetFramework> <Nullable>enable</Nullable> <ImplicitUsings>enable</ImplicitUsings> </PropertyGroup> </Project> ``` dotnet build MSBuild version 17.4.0+18d5aef85 for .NET Get following error: C:\Users\dtaylor\source\repos\EmptyBlazorApp1\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGe nerators.RazorSourceGenerator\Pages_Index_razor.g.cs(56,132): error CS1503: Argument 3: cannot convert from 'Microsoft. AspNetCore.Components.EventCallback<string>' to 'System.Action<string?>' [C:\Users\dtaylor\source\repos\EmptyBlazorApp1 \EmptyBlazorApp1.csproj] ### Expected Behavior Expected behaviour is sample included at URL below should work as documented in the blog entry: https://devblogs.microsoft.com/dotnet/asp-net-core-updates-in-dotnet-7-preview-7/#:~:text=In.NET%207%20you%20can%20now%20easily%20run%20async,%2F%2F...%20do%20something%20asynchronously%20with%20%27searchText%27...%20%7D%20%7D ### Steps To Reproduce Just use: dotnet new blazorserver-empty Then paste this code into the Pages/Index.razor file: ``` @page "/" <input @bind="searchText" @bind:after="PerformSearch" /> @code { string searchText; async Task PerformSearch() { // ... do something asynchronously with 'searchText' ... } } ``` ### Exceptions (if any) _No response_ ### .NET Version 7.0.100 ### Anything else? .NET SDK: Version: 7.0.100 Commit: e12b7af219 Runtime Environment: OS Name: Windows OS Version: 10.0.19042 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\7.0.100\ Host: Version: 7.0.0 Architecture: x64 Commit: d099f075e4 .NET SDKs installed: 7.0.100 [C:\Program Files\dotnet\sdk] .NET runtimes installed: Microsoft.AspNetCore.App 6.0.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 7.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 6.0.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 7.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 6.0.11 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 7.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Other architectures found: x86 [C:\Program Files (x86)\dotnet] registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation] Environment variables: Not set global.json file: Not found Learn more: https://aka.ms/dotnet/info Download .NET: https://aka.ms/dotnet/download