ASP.NET MVC 에서 특정 VIEW 의 랜더링 값(HTML) 을 가져오는 방법

 

ASP.NET MVC 에서 특정 VIEW 의 랜더링 값(HTML) 을 가져오는 방법에 대해 알아보죠.

 

http://www.codemag.com/article/1312081

 

샘플1

설명 : view 를 랜더링 하기 위해선, ControllerContext 가 필요하다는 점이 있습니다. 하나의 컨트롤러 안에 문자열을 view 의 razor 로 랜더링이 가능합니다.

static string RenderViewToString(ControllerContext context,
                                    string viewPath,
                                    object model = null,
                                    bool partial = false)
{
    // first find the ViewEngine for this view
    ViewEngineResult viewEngineResult = null;
    if (partial)
        viewEngineResult = ViewEngines.Engines.FindPartialView( context, viewPath);
    else
        viewEngineResult = ViewEngines.Engines.FindView(context, viewPath, null);
     
    if (viewEngineResult == null)
        throw new FileNotFoundException("View cannot be found.");
     
    // get the view and attach the model to view data
    var view = viewEngineResult.View;
    context.Controller.ViewData.Model = model;
     
    string result = null;
     
    using (var sw = new StringWriter())
    {
        var ctx = new ViewContext(context, view,
                                    context.Controller.ViewData,
                                    context.Controller.TempData,
                                    sw);
        view.Render(ctx, sw);
        result = sw.ToString();
    }
     
    return result;
}

 

샘플2

설명 :  Context 와 Controller 의 인스턴스를 생성하는 구문입니다.

public static T CreateController<T>(RouteData routeData = null)
    where T : Controller, new()
{
    // create a disconnected controller instance
    T controller = new T();
     
    // get context wrapper from HttpContext if available
    HttpContextBase wrapper;
    if (System.Web.HttpContext.Current != null)
        wrapper = new HttpContextWrapper(System.Web.HttpContext.Current);
    else
        throw new InvalidOperationException(
            "Can't create Controller Context if no "+
            "active HttpContext instance is available.");
     
    if (routeData == null)
        routeData = new RouteData();
     
    // add the controller routing if not existing
    if (!routeData.Values.ContainsKey("controller") &&
        !routeData.Values.ContainsKey("Controller"))
        routeData.Values.Add("controller",
                             controller.GetType()
                                       .Name.ToLower() .Replace("controller", ""));
     
    controller.ControllerContext = new ControllerContext(wrapper, routeData, controller);
    return controller;
}

샘플3

설명 : Http Module 에서 MVC 를 랜더링 하는 방법

public class ErrorModule : ApplicationErrorModule
{
     
    protected override void OnDisplayError(
                               WebErrorHandler errorHandler,
                               ErrorViewModel model)
    {
        var response = HttpContext.Current.Response;
     
        // Create an arbitrary controller instance
        var controller =
            ViewRenderer.CreateController<GenericController>();
           
        string html = ViewRenderer.RenderPartialView(
                                    "~/views/shared/Error.cshtml",
                                    model,
                                    controller.ControllerContext);
     
        HttpContext.Current.Server.ClearError();
        response.TrySkipIisCustomErrors = true;
        response.ClearContent();
     
        response.StatusCode = 500;
        response.Write(html);
    }
}
     
// *any* controller class will do for the template
public class GenericController : Controller
{ }

샘플4

설명 : Web api 를 통해 view 의 Razor 의 결과값을 전달하는 방법입니다.

public class CustomerController : ApiController
{
    [HttpGet]
    public HttpResponseMessage Customer(int id = 0)
    {
        var customer = new Customer()
        {
            Id = id,
            Name = "Jimmy Roe",
            Address = "123 Nowhere Lane\r\nAnytown, USA",
            Email = "jroe@doeboy.com"
        };
     
        string accept = Request.Headers
                                .GetValues("Accept")
                                .FirstOrDefault();
     
        if (!string.IsNullOrEmpty(accept) &&
            accept.ToLower().Contains("text/html"))
        {
            var html = ViewRenderer
                        .RenderView(
                              "~/views/samples/customerapi.cshtml",
                              customer);
            var message=new HttpResponseMessage(HttpStatusCode.OK);
            message.Content =new StringContent(html, Encoding.UTF8,
                                                "text/html");
            return message;
        }
     
        return Request.CreateResponse<Customer>(HttpStatusCode.OK,
                                                customer);
    }
     
}