asp.net-mvc 在 MVC3 Razor 中，如何在操作中获取渲染视图的 html？

In MVC3 Razor, how do I get the html of a rendered view inside an action?

提问by Omu

Does anybody know how to get the generated html of a view inside an action?

有人知道如何在动作中获取视图的生成 html 吗？

Is it something like this:

是不是像这样：

public ActionResult Do()
{
    var html = RenderView("hello", model);
...
}

回答by Chev

I use a static method in a class I called Utilities.CommonI pass views back to the client as properties of JSON objects constantly so I had a need to render them to a string. Here ya go:

我在我调用的类中使用静态方法Utilities.Common我不断将视图作为 JSON 对象的属性传递回客户端，因此我需要将它们呈现为字符串。给你：

public static string RenderPartialViewToString(Controller controller, string viewName, object model)
{
    controller.ViewData.Model = model;
    using (StringWriter sw = new StringWriter())
    {
        ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(controller.ControllerContext, viewName);
        ViewContext viewContext = new ViewContext(controller.ControllerContext, viewResult.View, controller.ViewData, controller.TempData, sw);
        viewResult.View.Render(viewContext, sw);

        return sw.ToString();
    }
}

This will work for full views as well as partial views, just change ViewEngines.Engines.FindPartialViewto ViewEngines.Engines.FindView.

这适用于完整视图和部分视图，只需更改ViewEngines.Engines.FindPartialView为ViewEngines.Engines.FindView.

回答by Gary McGill

The accepted answer by @Chev above is good, but I wanted to render the result of a specific action, not just a particular view.

上面@Chev 接受的答案很好，但我想呈现特定操作的结果，而不仅仅是特定视图。

Also, I needed to be able to pass parameters to that action rather than rely on injecting a model.

此外，我需要能够将参数传递给该操作，而不是依赖于注入模型。

So I came up with my own method, that I put in the base class of my controllers (making it available to them all):

所以我想出了我自己的方法，我把它放在我的控制器的基类中（使其可供所有人使用）：

    protected string RenderViewResultAsString(ViewResult viewResult)
    {
        using (var stringWriter = new StringWriter())
        {
            this.RenderViewResult(viewResult, stringWriter);

            return stringWriter.ToString();
        }
    }

    protected void RenderViewResult(ViewResult viewResult, TextWriter textWriter)
    {
        var viewEngineResult = this.ViewEngineCollection.FindView(
            this.ControllerContext, 
            viewResult.ViewName, 
            viewResult.MasterName);
        var view = viewEngineResult.View;

        try
        {
            var viewContext = new ViewContext(
                this.ControllerContext, 
                view, 
                this.ViewData, 
                this.TempData, 
                textWriter);

            view.Render(viewContext, textWriter);
        }
        finally
        {
            viewEngineResult.ViewEngine.ReleaseView(this.ControllerContext, view);
        }
    }

Suppose I have an action called Foothat takes a model object and some other parameters, which together influence what view will be used:

假设我有一个名为的动作Foo，它接受一个模型对象和一些其他参数，它们共同影响将使用的视图：

    public ViewResult Foo(MyModel model, int bar)
    {
        if (bar == 1)
            return this.View("Bar1");
        else
            return this.View("Bar2", model);
    }

Now, if I want to get the result of calling action Foo, I can simply get the ViewResultby invoking the Foomethod, and then call RenderViewResultAsStringto get the HTML text:

现在，如果我想获取调用 action 的结果Foo，我可以简单地ViewResult通过调用Foo方法获取，然后调用RenderViewResultAsString获取 HTML 文本：

    var viewResult = this.Foo(model, bar);

    var html = this.RenderViewResultAsString(viewResult);