A view component

Yavsc/Helpers/TeXHelpers.cs

@@ -1,4 +1,12 @@
+using System;
+using System.IO;
 using System.Linq;
+using Microsoft.AspNet.Http;
+using Microsoft.AspNet.Mvc;
+using Microsoft.AspNet.Mvc.ModelBinding;
+using Microsoft.AspNet.Mvc.Rendering;
+using Microsoft.AspNet.Mvc.ViewEngines;
+using Microsoft.AspNet.Mvc.ViewFeatures;
 
 namespace Yavsc.Helpers
 {
@@ -11,5 +19,32 @@ namespace Yavsc.Helpers
 
             return string.Join(separator, items);
         }
+        public static string RenderViewToString(
+            this Controller controller, IViewEngine engine,
+            IHttpContextAccessor httpContextAccessor, 
+         string viewName, object model)
+{
+   using (var sw = new StringWriter())
+  {
+      if (engine == null)
+       throw new InvalidOperationException("no engine");
+       
+    // try to find the specified view
+    controller.TryValidateModel(model);
+    ViewEngineResult viewResult = engine.FindPartialView(controller.ActionContext, viewName);
+    // create the associated context
+    ViewContext viewContext = new ViewContext();
+    viewContext.ActionDescriptor = controller.ActionContext.ActionDescriptor;
+    viewContext.HttpContext = controller.ActionContext.HttpContext;
+    viewContext.TempData = controller.TempData;
+    viewContext.View = viewResult.View;
+    viewContext.Writer = sw;
+    
+    // write the render view with the given context to the stringwriter
+    viewResult.View.RenderAsync(viewContext);
+    viewResult.EnsureSuccessful();
+    return sw.GetStringBuilder().ToString();
+  }
+}
     }
 }