我有以下代码：
public ActionResult SomeAction()
{
return new JsonpResult
{
Data = new { Widget = "some partial html for the widget" }
};
}
我想修改它，以便我可以有
public ActionResult SomeAction()
{
// will render HTML that I can pass to the JSONP result to return.
var partial = RenderPartial(viewmodel);
return new JsonpResult
{
Data = new { Widget = partial }
};
}
这可能吗？有人能解释一下吗？
注意，我在发布解决方案之前编辑了问题。
解决方法
我选择了像ASP.NET MVC 4应用程序的扩展方法如下。我认为它比我看到的一些建议更简单：
public static class ViewExtensions
{
public static string RenderToString(this PartialViewResult partialView)
{
var httpContext = HttpContext.Current;
if (httpContext == null)
{
throw new NotSupportedException("An HTTP context is required to render the partial view to a string");
}
var controllerName = httpContext.Request.RequestContext.RouteData.Values["controller"].ToString();
var controller = (ControllerBase)ControllerBuilder.Current.GetControllerFactory().CreateController(httpContext.Request.RequestContext,controllerName);
var controllerContext = new ControllerContext(httpContext.Request.RequestContext,controller);
var view = ViewEngines.Engines.FindPartialView(controllerContext,partialView.ViewName).View;
var sb = new StringBuilder();
using (var sw = new StringWriter(sb))
{
using (var tw = new HtmlTextWriter(sw))
{
view.Render(new ViewContext(controllerContext,view,partialView.ViewData,partialView.TempData,tw),tw);
}
}
return sb.ToString();
}
}
它允许我执行以下操作：
var html = PartialView("SomeView").RenderToString();
此外，此方法仍然保留视图的任何Model，ViewBag和其他视图数据。
