asp.net-mvc – Mvc渲染动作/部分响应输出

// <summary>
// An extension methods for rendering a model/view into a stream
// </summary>
// <param name="myModel">The model you are trying render to a stream</param>
// <param name="controllerBase">This will come from your executing action</param>
// <returns></returns>
        public static Stream GetStream(CustomModel myModel,ControllerBase controllerBase)
        {
            //we will return this stream
            MemoryStream stream = new MemoryStream();

            //you can add variables to the view data
            controllerBase.ViewData["ViewDataVariable1"] = true;

            //set your model
            controllerBase.ViewData.Model = myModel;

            //The example uses the UTF-8 encoding,you should change that if you are using some other encoding.
            //write to a stream
            using (StreamWriter writer = new StreamWriter(stream,Encoding.UTF8))
            {
                using (var sw = new StringWriter())
                {
                    //render the view  ~/Views/Shared/_FeedbackMessage.cshtml (can be passed in as a parameter if you want to make it super generic)
                    var viewResult = ViewEngines.Engines.FindPartialView(controllerBase.ControllerContext,"_FeedbackMessage");

                    //create a new view context
                    var viewContext = new ViewContext(controllerBase.ControllerContext,viewResult.View,controllerBase.ViewData,controllerBase.TempData,sw);

                    //Render the viewengine and let razor do its magic
                    viewResult.View.Render(viewContext,sw);    
                    viewResult.ViewEngine.ReleaseView(controllerBase.ControllerContext,viewResult.View);

                    //get StringBuilder from StringWriter sw and write into the stream writer
                    //you could simply return the StringWriter here if that is what you were interested in doing
                    writer.Write(sw.GetStringBuilder().ToString());

                    writer.Flush();

                    stream.Position = 0;
                }

            }

            //return the stream from the above process
            return stream;
        }