凡在6 MVC的控制器和ControllerContext性能ViewEngines？ [英] Where are the ControllerContext and ViewEngines properties in MVC 6 Controller?

问题描述

我已经创建了一个新的项目MVC6，建设一个新的网站。我们的目标是获得一个视图的渲染结果。我发现下面的code，但我不能让它工作，因为我无法找到 ControllerContext 和 ViewEngines 。

下面是code我想重写：

 保护字符串RenderPartialViewToString（字符串的viewName，对象模型）
    {
        如果（string.IsNullOrEmpty（的viewName））
            的viewName = ControllerContext.RouteData.GetRequiredString（行动）;        ViewData.Model =模型;        使用（StringWriter的SW =新的StringWriter（））
        {
            ViewEngineResult的ViewResult = ViewEngines.Engines.FindPartialView（ControllerContext，的viewName）;
            ViewContext viewContext =新ViewContext（ControllerContext，viewResult.View，ViewData的，TempData的，SW）;
            viewResult.View.Render（viewContext，SW）;            返回sw.GetStringBuilder（）的ToString（）。
        }
    }
 

解决方案

ControllerContext

首先，我要指出一个控制器已不再是一个顶级的背景下，一个动作。所以，你可以替换大多 ControllerContext 与 ActionContext中

ViewEngines

这是事情变得有点尴尬！我不完全知道如何获得defaut视图引擎，但新的DI框架增加了一个参考 CompositeViewEngine 它可以为你做这项工作。例如：

  VAR引擎= Resolver.GetService（typeof运算（ICompositeViewEngine））作为ICompositeViewEngine;
 

所以把这个放在一起，这应该为你工作：

 保护字符串RenderPartialViewToString（字符串的viewName，对象模型）
{
    如果（string.IsNullOrEmpty（的viewName））
        的viewName = ActionContext.ActionDescriptor.Name;    ViewData.Model =模型;    使用（StringWriter的SW =新的StringWriter（））
    {
        VAR引擎= Resolver.GetService（typeof运算（ICompositeViewEngine））
            作为ICompositeViewEngine;
        ViewEngineResult的ViewResult = engine.FindPartialView（ActionContext中，的viewName）;        ViewContext viewContext =新ViewContext（
            ActionContext中，
            viewResult.View，
            ViewData的，
            TempData的，
            SW，
            新HtmlHelperOptions（）//添加在此参数
        ）;        //一切都是异步吧！
        VAR T = viewResult.View.RenderAsync（viewContext）;
        t.Wait（）;        返回sw.GetStringBuilder（）的ToString（）。
    }
}
 

I've created a new MVC6 project and building a new site. The goal is to get the rendered result of a view. I found the following code, but I can't get it to work because I can't find the ControllerContext and the ViewEngines.

Here is the code I want to rewrite:

    protected string RenderPartialViewToString(string viewName, object model)
    {
        if (string.IsNullOrEmpty(viewName))
            viewName = ControllerContext.RouteData.GetRequiredString("action");

        ViewData.Model = model;

        using (StringWriter sw = new StringWriter())
        {
            ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(ControllerContext, viewName);
            ViewContext viewContext = new ViewContext(ControllerContext, viewResult.View, ViewData, TempData, sw);
            viewResult.View.Render(viewContext, sw);

            return sw.GetStringBuilder().ToString();
        }
    }

解决方案

ControllerContext

First I should mention that a controller is no longer a top level context, an action is. So you can mostly replace ControllerContext with ActionContext

ViewEngines

This is where things get a bit awkward! I'm not entirely sure how to get the defaut view engine but the new DI framework has added a reference to CompositeViewEngine which may do the job for you. For example:

var engine = Resolver.GetService(typeof(ICompositeViewEngine)) as ICompositeViewEngine;

So putting all this together, this should work for you:

protected string RenderPartialViewToString(string viewName, object model)
{
    if (string.IsNullOrEmpty(viewName))
        viewName = ActionContext.ActionDescriptor.Name;

    ViewData.Model = model;

    using (StringWriter sw = new StringWriter())
    {
        var engine = Resolver.GetService(typeof(ICompositeViewEngine))
            as ICompositeViewEngine;
        ViewEngineResult viewResult = engine.FindPartialView(ActionContext, viewName);

        ViewContext viewContext = new ViewContext(
            ActionContext, 
            viewResult.View, 
            ViewData, 
            TempData, 
            sw, 
            new HtmlHelperOptions() //Added this parameter in
        );

        //Everything is async now!
        var t = viewResult.View.RenderAsync(viewContext);
        t.Wait();

        return sw.GetStringBuilder().ToString();
    }
}

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