未找到部分视图

我现在正忙于构建一个电子邮件引擎,它使用Razor模板系统来提供电子邮件模板。我贴了这个 question 昨天我解决了。

现在的问题似乎是,当我在视图中包含一个部分视图时,它就找不到了。我试图将部分视图包含在视图中,如下所示:

@await Html.PartialAsync("~/Views/Shared/EmailButton.cshtml", new EmailButtonViewModel("Confirm Account", "https://google.com"))

我试过把 ~ 在没有效果的情况下,我使用反射获取到部分视图的整个路径,并将其传递到 PartialAsync 那也不管用。我已尝试将整个路径添加到 startup.cs 具体如下:

services.Configure<RazorViewEngineOptions>(o =>
{
    var dir = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
    o.ViewLocationFormats.Add("~/Views/Shared/{0}" + RazorViewEngine.ViewExtension);
});

~ dir 指定文件夹中也不起作用的整个位置。我的电子邮件模板在.NET核心类库中,它们拥有 Build Action 设置为 Content 和 Copy to output directory 到 Copy always

我不确定还有什么要尝试。

文件夹结构

类库的文件夹结构如下:

代码

启动.cs 如下所示(为了简洁起见,去掉了不必要的部分):

services.AddScoped<IRazorViewToStringRenderer, RazorViewToStringRenderer>();
services.AddScoped<Email>();

services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
services.Configure<RazorViewEngineOptions>(o =>
{
    var dir = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
    o.ViewLocationFormats.Add("~/Views/Shared/{0}" + RazorViewEngine.ViewExtension);
});

呈现视图并将其转换为字符串的代码如下所示:

await _razorViewToStringRenderer.RenderViewToStringAsync("Views/Emails/NewOrder/NewOrder.cshtml", newOrderModel);

RenderViewToStringAsync 具体如下:

public async Task<string> RenderViewToStringAsync<TModel>(string viewName, TModel model)
{
    var actionContext = GetActionContext();
    var view = FindView(actionContext, viewName);

    using (var output = new StringWriter())
    {
        var viewContext = new ViewContext(
            actionContext,
            view,
            new ViewDataDictionary<TModel>(
                metadataProvider: new EmptyModelMetadataProvider(),
                modelState: new ModelStateDictionary())
            {
                Model = model
            },
            new TempDataDictionary(
                actionContext.HttpContext,
                _tempDataProvider),
            output,
            new HtmlHelperOptions());

        await view.RenderAsync(viewContext);

        return output.ToString();
    }
}

FindView 代码为

private IView FindView(ActionContext actionContext, string viewName)
{
    var dir = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
    var getViewResult = _viewEngine.GetView(executingFilePath: dir, viewPath: viewName, isMainPage: true);
    if (getViewResult.Success)
    {
        return getViewResult.View;
    }

    var findViewResult = _viewEngine.FindView(actionContext, viewName, isMainPage: true);
    if (findViewResult.Success)
    {
        return findViewResult.View;
    }

    var searchedLocations = getViewResult.SearchedLocations.Concat(findViewResult.SearchedLocations);
    var errorMessage = string.Join(
        Environment.NewLine,
        new[] {$"Unable to find view '{viewName}'. The following locations were searched:"}.Concat(
            searchedLocations));

    throw new InvalidOperationException(errorMessage);
}