简单注塑器-自定义WebViewPage

Question

我有一个小应用程序(目前)，它使用翻译。我的翻译服务叫翻译(ITranslator)。

我的问题是，我不想在每个控制器(返回一个视图)中检索这个类，所以我可以在我的视图中使用它。

ListService也有类似的问题(存储所有SelectListItem列表)。

CustomWebViewPage

public abstract class CustomViewPage<TModel> : WebViewPage<TModel>
{
    readonly IScriptFactory scriptFactory;
    readonly IMembership membership;
    readonly IListService listService;
    readonly ITranslator translator;

    IHtmlString path;

    public IMembership Membership { get { return this.membership; } }
    public override IPrincipal User { get { return this.membership.User; } }
    public IListService Lists { get { return this.listService; } }
    public ITranslator Translator { get { return this.translator; } }

    public CustomViewPage(IScriptFactory scriptFactory, IMembership membership,
        IListService listService, ITranslator translator)
    {
        this.scriptFactory = scriptFactory;
        this.membership = membership;
        this.listService = listService;
        this.translator = translator;
    }

    public IHtmlString OwnScriptsPath
    {
        get { return path ?? (path = scriptFactory.Create(this.Html).ToHtmlString()); }
    }

    private string languageHtml =
        "<meta name=\"language\" content=\"" + membership.CurrentLanguage + "\">";
    public IHtmlString MetaLanguage { get { return MvcHtmlString.Create(languageHtml); } }
}

以及使用情况：

<div>
   @Lists.GetNationalities(Model.NationalityId)
</div>

但是，在运行应用程序时，我有以下错误：

'NAMESPACE.CustomViewPage‘不包含接受0参数的构造函数

但是如果我创建第二个构造函数，Simple-Injector会抛出一个错误，因为它不支持多个构造函数。

我怎样才能实现我想要的，还是不可能？

编辑

全堆栈跟踪

c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\vs\520dfaa2\f5e4578c\App_Web_index.cshtml.a8d08dba.jtlk7fxz.0.cs(40)：CS1729：'SportsHub.SDK.Infrastructure.CustomViewPage‘不包含接受0参数的构造函数

at System.Web.Compilation.AssemblyBuilder.Compile()
at System.Web.Compilation.BuildProvidersCompiler.PerformBuild()
at System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath)
at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)
at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)
at System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound)    at System.Web.Compilation.BuildManager.GetCompiledType(VirtualPath virtualPath)
at System.Web.Compilation.BuildManager.GetCompiledType(String virtualPath)
at System.Web.Mvc.BuildManagerWrapper.System.Web.Mvc.IBuildManager.GetCompiledType(String virtualPath)
at System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer)
at System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass21.<>c__DisplayClass2b.<BeginInvokeAction>b__1c()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult)

编辑2

正如@StriplingWarrior和“Steven”建议的那样，我使用了属性注入，但是它似乎并不适用于WebViewPage

我在一个服务上测试了它，属性注入是成功的，但是在这个类中，属性来了null。

PS:我用get；set公布了这些房产；

新ViewPage：

public abstract class CustomViewPage<TModel> : WebViewPage<TModel>
{
    [Inject]
    public IScriptFactory scriptFactory { get; set; }
    [Inject]
    public IMembership membership { get; set; }
    [Inject]
    public IListService listService { get; set; }
    [Inject]
    public ITranslator translator { get; set; }

    IHtmlString scriptsPath;
    public IHtmlString OwnScriptsPath()
    {
        if (scriptsPath == null)
        {
            scriptsPath = scriptFactory.Create(this.Html).ToHtmlString();
        }
        return scriptsPath;
    }

    /// <summary>
    /// Renders the current user language with a meta tag
    /// </summary>
    public IHtmlString MetaLanguage()
    {
        return MvcHtmlString.Create("<meta name=\"language\" content=\"" + membership.CurrentLanguage + "\">");
    }

对于InjectAttribute，我遵循了下面的文档。

Answer 1

您必须使用像这这样的寄存器依赖容器。这样，您就可以指定所有接口，以及当ASP.NET调用SimpleInject来解决依赖关系时，匹配的实现是什么。

还可以创建如下所示的无参数构造函数：

public CustomViewPage() : base(new ScriptFactory(), new Membership()...) { }

但我不建议你..。最好的办法就是让这个依赖解析逻辑起作用。