c# - 即时更改视图的路径

Question

我有这堂课：

public abstract class MyController : Controller
{
  protected override void OnActionExecuting(ActionExecutingContext filterContext)
  {
      string viewPath = filterContext/*... .ViewPath*/;
      viewPath = "Some new View Path";
  }
}

我想检索并用另一个替换执行视图的路径。我试图在 Web 调用中调试查看过滤器上下文，但是我没有设法找到即将呈现的视图。

我怎么做？

Answer 1

来自MSDN：

Controller.OnActionExecuting Method：在调用操作方法之前调用。在这个阶段，由于还没有执行，所以不ActionResult存在。Action

你最好OnResultExecuting改用：

protected override void OnResultExecuting(ResultExecutingContext filterContext)
{
    var viewResult = filterContext.Result as ViewResult;

    if (viewResult != null)
    {
        var razorEngine = viewResult.ViewEngineCollection.OfType<RazorViewEngine>().Single();
        var viewName = !String.IsNullOrEmpty(viewResult.ViewName) ? viewResult.ViewName : filterContext.RouteData.Values["action"].ToString();
        var razorView = razorEngine.FindView(filterContext.Controller.ControllerContext, viewName, viewResult.MasterName, false).View as RazorView;
        var currentPath = razorView.ViewPath;
        var newPath = currentPath.Replace("..", "...");
        viewResult.View = new RazorView(filterContext.Controller.ControllerContext, newPath, razorView.LayoutPath, razorView.RunViewStartPages, razorView.ViewStartFileExtensions);
    }

    base.OnResultExecuting(filterContext);
}