如何在 ASP.NET MVC4 Api 控制器中将视图呈现为字符串

Question

ASP.NET MVC4 Web API 控制器应在 json 结果属性中以 html 形式返回 Razor 视图。

我试过控制器

public class TestController : ApiController
{
    public HttpResponseMessage Get()
    {
        var body = RenderViewToString<object>("~/Views/Broneeri/Schedule.cshtml", new object() );
        return Request.CreateResponse(HttpStatusCode.OK, new { content = body } );
    }

    string RenderViewToString<T>(string viewName, T model)
    {
        ViewDataDictionary ViewData = new ViewDataDictionary(model);
        TempDataDictionary TempData = new TempDataDictionary();
        ControllerContext controllerContext = new System.Web.Mvc.ControllerContext();
        controllerContext.RouteData = new RouteData();

        controllerContext.RouteData.Values.Add("controller", "Schedule");
        using (var sw = new StringWriter())
        {
            var viewResult = ViewEngines.Engines.FindPartialView(controllerContext, viewName);
            var viewContext = new ViewContext(controllerContext, viewResult.View, ViewData,          
                       TempData, sw);
            viewResult.View.Render(viewContext, sw);
            viewResult.ViewEngine.ReleaseView(controllerContext, viewResult.View);
            return sw.GetStringBuilder().ToString();
        }
    }
 }

但我遇到了一个奇怪的异常

System.NotImplementedException was unhandled by user code
  HResult=-2147467263
  Message=The method or operation is not implemented.
  Source=System.Web
  StackTrace:
       at System.Web.HttpContextBase.get_Items()
       at System.Web.Mvc.VirtualPathProviderViewEngine.GetPath(ControllerContext controllerContext, String[] locations, String[] areaLocations, String locationsPropertyName, String name, String controllerName, String cacheKeyPrefix, Boolean useCache, String[]& searchedLocations)
       at System.Web.Mvc.VirtualPathProviderViewEngine.FindPartialView(ControllerContext controllerContext, String partialViewName, Boolean useCache)
       at System.Web.Mvc.ViewEngineCollection.Find(Func`2 lookup, Boolean trackSearchedPaths)
       at System.Web.Mvc.ViewEngineCollection.Find(Func`2 cacheLocator, Func`2 locator)
...

一行

var viewResult = ViewEngines.Engines.FindPartialView(controllerContext, viewName);

如何从 ASP.NET 4 Web API 控制器的视图中返回 HTML 内容？

Answer 1

您需要使用 NuGet 控制台Install-Package RazorEngine。这是对我有用的代码：

using RazorEngine;
using RazorEngine.Templating;

string razorTemplate = "Hello @Model!";
string html = Engine.Razor.RunCompile(
    razorTemplate, 
    "uniqueTemplateKey", // Guid.NewGuid().ToString() for example
    modelType: typeof(string), 
    model: "Lorem Ipsum");

希望对你有帮助！