ASP.NET Core Blazor WebAssembly의 어셈블리 지연 로드

어셈블리 파일은 파일 확장자를 사용하는 .NET 어셈블리 에 웹빌 패키징 형식을 .wasm 사용합니다.

아티클 전체에서 {FILE EXTENSION} 자리 표시자는 "wasm"를 나타냅니다.

어셈블리 파일은 파일 확장자를 사용하는 DLL(동적 연결 라이브러리)을 기반으로 합니다 .dll .

아티클 전체에서 {FILE EXTENSION} 자리 표시자는 "dll"를 나타냅니다.

@using Microsoft.AspNetCore.Components.Routing
@using Microsoft.AspNetCore.Components.WebAssembly.Services
@using Microsoft.Extensions.Logging
@inject LazyAssemblyLoader AssemblyLoader
@inject ILogger<App> Logger

<Router AppAssembly="typeof(App).Assembly" 
    OnNavigateAsync="OnNavigateAsync">
    ...
</Router>

@code {
    private async Task OnNavigateAsync(NavigationContext args)
    {
        try
           {
               if (args.Path == "{PATH}")
               {
                   var assemblies = await AssemblyLoader.LoadAssembliesAsync(
                       new[] { {LIST OF ASSEMBLIES} });
               }
           }
           catch (Exception ex)
           {
               Logger.LogError("Error: {Message}", ex.Message);
           }
    }
}

@using Microsoft.AspNetCore.Components.Routing
@using Microsoft.AspNetCore.Components.WebAssembly.Services
@using Microsoft.Extensions.Logging
@inject LazyAssemblyLoader AssemblyLoader
@inject ILogger<App> Logger

<Router AppAssembly="typeof(Program).Assembly" 
    OnNavigateAsync="OnNavigateAsync">
    ...
</Router>

@code {
    private async Task OnNavigateAsync(NavigationContext args)
    {
        try
           {
               if (args.Path == "{PATH}")
               {
                   var assemblies = await AssemblyLoader.LoadAssembliesAsync(
                       new[] { {LIST OF ASSEMBLIES} });
               }
           }
           catch (Exception ex)
           {
               Logger.LogError("Error: {Message}", ex.Message);
           }
    }
}

@using System.Reflection
@using Microsoft.AspNetCore.Components.Routing
@using Microsoft.AspNetCore.Components.WebAssembly.Services
@using Microsoft.Extensions.Logging
@inject ILogger<App> Logger
@inject LazyAssemblyLoader AssemblyLoader

<Router AppAssembly="typeof(App).Assembly" 
    AdditionalAssemblies="lazyLoadedAssemblies" 
    OnNavigateAsync="OnNavigateAsync">
    ...
</Router>

@code {
    private List<Assembly> lazyLoadedAssemblies = new();

    private async Task OnNavigateAsync(NavigationContext args)
    {
        try
           {
               if (args.Path == "{PATH}")
               {
                   var assemblies = await AssemblyLoader.LoadAssembliesAsync(
                       new[] { {LIST OF ASSEMBLIES} });
                   lazyLoadedAssemblies.AddRange(assemblies);
               }
           }
           catch (Exception ex)
           {
               Logger.LogError("Error: {Message}", ex.Message);
           }
    }
}

@using System.Reflection
@using Microsoft.AspNetCore.Components.Routing
@using Microsoft.AspNetCore.Components.WebAssembly.Services
@using Microsoft.Extensions.Logging
@inject ILogger<App> Logger
@inject LazyAssemblyLoader AssemblyLoader

<Router AppAssembly="typeof(Program).Assembly" 
    AdditionalAssemblies="lazyLoadedAssemblies" 
    OnNavigateAsync="OnNavigateAsync">
    ...
</Router>

@code {
    private List<Assembly> lazyLoadedAssemblies = new List<Assembly>();

    private async Task OnNavigateAsync(NavigationContext args)
    {
        try
           {
               if (args.Path == "{PATH}")
               {
                   var assemblies = await AssemblyLoader.LoadAssembliesAsync(
                       new[] { {LIST OF ASSEMBLIES} });
                   lazyLoadedAssemblies.AddRange(assemblies);
               }
           }
           catch (Exception ex)
           {
               Logger.LogError("Error: {Message}", ex.Message);
           }
    }
}

호스트된 Blazor WebAssembly 솔루션에서 어셈블리 지연 로드

프레임워크의 지연 로드 구현에서는 호스트된 Blazor WebAssembly솔루션에서 미리 렌더링으로 지연 로드를 지원합니다. 미리 렌더링 중에는 지연 로드로 표시된 어셈블리를 포함한 모든 어셈블리가 로드된다고 가정합니다. LazyAssemblyLoader 서비스를 Server 프로젝트에 수동으로 등록합니다.

Program.cs 프로젝트 Server 파일의 맨 위에 Microsoft.AspNetCore.Components.WebAssembly.Services의 네임스페이스를 추가합니다.

using Microsoft.AspNetCore.Components.WebAssembly.Services;

Program.cs 프로젝트의 Server에서 서비스를 등록합니다.

builder.Services.AddScoped<LazyAssemblyLoader>();

Startup.cs 프로젝트 Server 파일의 맨 위에 Microsoft.AspNetCore.Components.WebAssembly.Services의 네임스페이스를 추가합니다.

using Microsoft.AspNetCore.Components.WebAssembly.Services;

프로젝트의 (Startup.ConfigureServices)Startup.cs에서 Server 서비스를 등록합니다.

services.AddScoped<LazyAssemblyLoader>();

using Microsoft.Extensions.Logging;

namespace GrantImaharaRobotControls;

public static class HandGesture
{
    public static bool ThumbUp(Axis axis, ILogger logger)
    {
        logger.LogInformation("Thumb up gesture. Axis: {Axis}", axis);

        // Code to make robot perform gesture

        return true;
    }
}

public enum Axis { Left, Right }

using Microsoft.Extensions.Logging;

namespace GrantImaharaRobotControls
{
    public static class HandGesture
    {
        public static bool ThumbUp(Axis axis, ILogger logger)
        {
            logger.LogInformation("Thumb up gesture. Axis: {Axis}", axis);

            // Code to make robot perform gesture

            return true;
        }
    }

    public enum Axis { Left, Right }
}

@page "/robot"
@using Microsoft.AspNetCore.Components.Forms
@using Microsoft.Extensions.Logging
@inject ILogger<Robot> Logger

<h1>Robot</h1>

<EditForm FormName="RobotForm" Model="robotModel" OnValidSubmit="HandleValidSubmit">
    <InputRadioGroup @bind-Value="robotModel.AxisSelection">
        @foreach (var entry in Enum.GetValues<Axis>())
        {
            <InputRadio Value="entry" />
            <text>&nbsp;</text>@entry<br>
        }
    </InputRadioGroup>

    <button type="submit">Submit</button>
</EditForm>

<p>
    @message
</p>

@code {
    private RobotModel robotModel = new() { AxisSelection = Axis.Left };
    private string? message;

    private void HandleValidSubmit()
    {
        Logger.LogInformation("HandleValidSubmit called");

        var result = HandGesture.ThumbUp(robotModel.AxisSelection, Logger);

        message = $"ThumbUp returned {result} at {DateTime.Now}.";
    }

    public class RobotModel
    {
        public Axis AxisSelection { get; set; }
    }
}

@page "/robot"
@using Microsoft.AspNetCore.Components.Forms
@using Microsoft.Extensions.Logging
@inject ILogger<Robot> Logger

<h1>Robot</h1>

<EditForm Model="robotModel" OnValidSubmit="HandleValidSubmit">
    <InputRadioGroup @bind-Value="robotModel.AxisSelection">
        @foreach (var entry in Enum.GetValues<Axis>())
        {
            <InputRadio Value="entry" />
            <text>&nbsp;</text>@entry<br>
        }
    </InputRadioGroup>

    <button type="submit">Submit</button>
</EditForm>

<p>
    @message
</p>

@code {
    private RobotModel robotModel = new() { AxisSelection = Axis.Left };
    private string? message;

    private void HandleValidSubmit()
    {
        Logger.LogInformation("HandleValidSubmit called");

        var result = HandGesture.ThumbUp(robotModel.AxisSelection, Logger);

        message = $"ThumbUp returned {result} at {DateTime.Now}.";
    }

    public class RobotModel
    {
        public Axis AxisSelection { get; set; }
    }
}

@page "/robot"
@using Microsoft.AspNetCore.Components.Forms
@using Microsoft.Extensions.Logging
@inject ILogger<Robot> Logger

<h1>Robot</h1>

<EditForm Model="robotModel" OnValidSubmit="HandleValidSubmit">
    <InputRadioGroup @bind-Value="robotModel.AxisSelection">
        @foreach (var entry in (Axis[])Enum
            .GetValues(typeof(Axis)))
        {
            <InputRadio Value="entry" />
            <text>&nbsp;</text>@entry<br>
        }
    </InputRadioGroup>

    <button type="submit">Submit</button>
</EditForm>

<p>
    @message
</p>

@code {
    private RobotModel robotModel = new RobotModel() { AxisSelection = Axis.Left };
    private string message;

    private void HandleValidSubmit()
    {
        Logger.LogInformation("HandleValidSubmit called");

        var result = HandGesture.ThumbUp(robotModel.AxisSelection, Logger);

        message = $"ThumbUp returned {result} at {DateTime.Now}.";
    }

    public class RobotModel
    {
        public Axis AxisSelection { get; set; }
    }
}

@using System.Reflection
@using Microsoft.AspNetCore.Components.Routing
@using Microsoft.AspNetCore.Components.WebAssembly.Services
@using Microsoft.Extensions.Logging
@inject ILogger<App> Logger
@inject LazyAssemblyLoader AssemblyLoader

<Router AppAssembly="typeof(App).Assembly"
        AdditionalAssemblies="lazyLoadedAssemblies" 
        OnNavigateAsync="OnNavigateAsync">
    <Navigating>
        <div style="padding:20px;background-color:blue;color:white">
            <p>Loading the requested page&hellip;</p>
        </div>
    </Navigating>
    <Found Context="routeData">
        <RouteView RouteData="routeData" DefaultLayout="typeof(MainLayout)" />
    </Found>
    <NotFound>
        <LayoutView Layout="typeof(MainLayout)">
            <p>Sorry, there's nothing at this address.</p>
        </LayoutView>
    </NotFound>
</Router>

@code {
    private List<Assembly> lazyLoadedAssemblies = new();
    private bool grantImaharaRobotControlsAssemblyLoaded;

    private async Task OnNavigateAsync(NavigationContext args)
    {
        try
        {
            if ((args.Path == "robot") && !grantImaharaRobotControlsAssemblyLoaded)
            {
                var assemblies = await AssemblyLoader.LoadAssembliesAsync(
                    new[] { "GrantImaharaRobotControls.{FILE EXTENSION}" });
                lazyLoadedAssemblies.AddRange(assemblies);
                grantImaharaRobotControlsAssemblyLoaded = true;
            }
        }
        catch (Exception ex)
        {
            Logger.LogError("Error: {Message}", ex.Message);
        }
    }
}

@using System.Reflection
@using Microsoft.AspNetCore.Components.Routing
@using Microsoft.AspNetCore.Components.WebAssembly.Services
@using Microsoft.Extensions.Logging
@inject ILogger<App> Logger
@inject LazyAssemblyLoader AssemblyLoader

<Router AppAssembly="typeof(Program).Assembly"
        AdditionalAssemblies="lazyLoadedAssemblies" 
        OnNavigateAsync="OnNavigateAsync">
    <Navigating>
        <div style="padding:20px;background-color:blue;color:white">
            <p>Loading the requested page&hellip;</p>
        </div>
    </Navigating>
    <Found Context="routeData">
        <RouteView RouteData="routeData" DefaultLayout="typeof(MainLayout)" />
    </Found>
    <NotFound>
        <LayoutView Layout="typeof(MainLayout)">
            <p>Sorry, there's nothing at this address.</p>
        </LayoutView>
    </NotFound>
</Router>

@code {
    private List<Assembly> lazyLoadedAssemblies = new List<Assembly>();
    private bool grantImaharaRobotControlsAssemblyLoaded;

    private async Task OnNavigateAsync(NavigationContext args)
    {
        try
        {
            if ((args.Path == "robot") && !grantImaharaRobotControlsAssemblyLoaded)
            {
                var assemblies = await AssemblyLoader.LoadAssembliesAsync(
                    new[] { "GrantImaharaRobotControls.{FILE EXTENSION}" });
                lazyLoadedAssemblies.AddRange(assemblies);
                grantImaharaRobotControlsAssemblyLoaded = true;
            }
        }
        catch (Exception ex)
        {
            Logger.LogError("Error: {Message}", ex.Message);
        }
    }
}