ASP.NET MVC Razor:如何在控制器操作中呈现 Razor Partial View 的 HTML [英] ASP.NET MVC Razor: How to render a Razor Partial View's HTML inside the controller action

问题描述

如何在 ASP.NET 视图引擎上生成给定局部视图的 HTML 已知.

How to generate a HTML of a given partial view on ASP.NET view engine is known.

但如果此功能用于 razor 分部视图，则它不起作用，因为异常表示分部视图不是从UserControl"派生的.

But if this functionality is used on razor partial view it does not work, as exception says the partial view does not derive from "UserControl".

如何修复渲染以支持razor局部视图?

How to fix the rendering to support razor partial view?

我需要这个，因为我从这个部分视图中生成电子邮件......

I need this because I generate emails form this partial views ...

更新:

失败的代码(@mcl):

Code that fails (@mcl):

public string RenderPartialToString(string controlName, object viewData)
    {
        ViewPage viewPage = new ViewPage() { ViewContext = new ViewContext() };
        viewPage.Url = this.GetUrlHelper();

        string fullControlName = "~/Views/Email/" + controlName + ".ascx";

        viewPage.ViewData = new ViewDataDictionary(viewData);
        viewPage.Controls.Add(viewPage.LoadControl(fullControlName));

        StringBuilder sb = new StringBuilder();
        using (StringWriter sw = new StringWriter(sb))
        {
            using (HtmlTextWriter tw = new HtmlTextWriter(sw))
            {
                viewPage.RenderControl(tw);
            }
        }
        return sb.ToString();
    }

推荐答案

@Html.Partial("nameOfPartial", Model)

更新

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();
    }
}

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