以字符串形式获取MVCpartialView / View数据

Question

I have a requirement where I need HTML data from View to be saved in a string variable, something like this

string data = GetData(Id)

and GetData is a method which returns View like

public ActionResult GetData(int Id) { return PartialView("ViewName"); }

My requirement is to get whatever this View creates/return as an HTML to be assigned to string variable data

Is it actually possible?

Thanks for Help

Answer 1

Try this

 public static string GetTemplateContentInstance(ControllerContext controllerContext, string viewName, object model)
    {
        if (string.IsNullOrWhiteSpace(viewName))
            //Return name of view for current action
            viewName = controllerContext.RouteData.GetRequiredString("action");

        controllerContext.Controller.ViewData.Model = model;
        using (StringWriter stringWriter = new StringWriter())
        {
            ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(controllerContext, viewName);
            ViewContext viewContext = new ViewContext(controllerContext, viewResult.View, controllerContext.Controller.ViewData, controllerContext.Controller.TempData, stringWriter);
            viewResult.View.Render(viewContext, stringWriter);

            return stringWriter.GetStringBuilder().ToString();
        }
    }

Use as below

 string viewBody = GetTemplateContentInstance(this.ControllerContext, Url.Content("ViewName"), ModelName)

Answer 2

Try this:

private string GetHtmlFromUrl(string url)
{
    string html = "";
    HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);

    HttpWebResponse response = (HttpWebResponse)request.GetResponse();
    // get the response stream.
    //Stream responseStream = response.GetResponseStream();
    // use a stream reader that understands UTF8
    StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
    html = reader.ReadToEnd();
    // close the reader
    reader.Close();
    response.Close();
    return html;//return content html
}

Usage:

string data = GetHtmlFromURL("/YourController/GetData/{ID}") 
//or GetHtmlFromURL("/YourController/GetData?ID={ID}") if your route isn't set to accept ID

Answer 3

You try to create an instance of an HtmlHelper and use the RenderPartial extension methods within that helper

Note: you need to include a using to System.Web.Mvc.Html to access the RenderPartial

public static HtmlHelper GetHtmlHelper( this Controller controller )
        {
            var viewContext = new ViewContext( controller.ControllerContext, new FakeView(), controller.ViewData, controller.TempData, TextWriter.Null );
            new HtmlHelper( viewContext, new ViewPage() ).RenderPartial("/mypartial");
        }

        public class FakeView : IView
        {
            public void Render( ViewContext viewContext, TextWriter writer )
            {
                throw new InvalidOperationException();
            }
        }