c# - ASP.NET MVC Razor : How to render a Razor Partial View's HTML inside the controller action

Question

如何在 ASP.NET View 引擎上生成给定局部 View 的 HTML is known .

但如果此功能用于 Razor 部分 View ，则它不起作用，因为异常(exception)情况表明部分 View 不是从“UserControl”派生的。

如何修复渲染以支持 Razor 局部 View ？

我需要这个，因为我从这个部分 View 生成电子邮件......

更新:

失败的代码(@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();
    }

Answer 1

@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();
    }
}