これを試して
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();
}
}
以下のように使用
string viewBody = GetTemplateContentInstance(this.ControllerContext, Url.Content("ViewName"), ModelName)