Asp.Net MVC中不指定View Name時如何返回ActionResult的

通過ActionResult類尋找它的子類，下面是找到的代碼：

//ViewResultBase.cs

    public override void ExecuteResult(ControllerContext context)    {      if (context == null)        throw new ArgumentNullException("context");      if (string.IsNullOrEmpty(this.ViewName))        this.ViewName = context.RouteData.GetRequiredString("action");      ViewEngineResult viewEngineResult = (ViewEngineResult) null;      if (this.View == null)      {        viewEngineResult = this.FindView(context);        this.View = viewEngineResult.View;      }      TextWriter output = context.HttpContext.Response.Output;      this.View.Render(new ViewContext(context, this.View, this.ViewData, this.TempData, output), output);      if (viewEngineResult == null)        return;      viewEngineResult.ViewEngine.ReleaseView(context, this.View);    }

 這裡可以看到如果View不指定會返迴路由中action名相同的view