我创建了一个新的MVC6项目,并建立了一个新的网站.目标是获得一个视图的渲染结果.我发现以下代码,但是我无法找到它,因为我找不到ControllerContext和ViewEngines.
这是我要重写的代码：
protected string RenderPartialViewToString(string viewName,object model)
{
if (string.IsNullOrEmpty(viewName))
viewName = ControllerContext.RouteData.GetrequiredString("action");
ViewData.Model = model;
using (StringWriter sw = new StringWriter())
{
ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(ControllerContext,viewName);
ViewContext viewContext = new ViewContext(ControllerContext,viewResult.View,ViewData,TempData,sw);
viewResult.View.Render(viewContext,sw);
return sw.GetStringBuilder().ToString();
}
}
解决方法
ControllerContext
首先我应该提到一个控制器不再是一个顶级的上下文,一个动作就是.所以你可以用ActionContext替代ControllerContext
ViewEngines
这是事情有点尴尬！我不完全确定如何获得视觉引擎,但新的DI框架已经添加了一个可以为您完成此工作的CompositeViewEngine的引用.例如：
var engine = Resolver.GetService(typeof(ICompositeViewEngine)) as ICompositeViewEngine;
所以把这一切放在一起,这应该适合你：
protected string RenderPartialViewToString(string viewName,object model)
{
if (string.IsNullOrEmpty(viewName))
viewName = ActionContext.ActionDescriptor.Name;
ViewData.Model = model;
using (StringWriter sw = new StringWriter())
{
var engine = Resolver.GetService(typeof(ICompositeViewEngine))
as ICompositeViewEngine;
ViewEngineResult viewResult = engine.FindPartialView(ActionContext,viewName);
ViewContext viewContext = new ViewContext(
ActionContext,sw,new HtmlHelperOptions() //Added this parameter in
);
//Everything is async Now!
var t = viewResult.View.RenderAsync(viewContext);
t.Wait();
return sw.GetStringBuilder().ToString();
}
}