将ViewBag值从ActionLink传递到Controller

Question

我正在尝试将privApplicationId（从ViewBag检索）传递给我的控制器中的ActionResult

布局Cshtml页面：

 @Html.ActionLink("Comments", "ViewComments", "SubmittedApplications", new { @area = "Privileging" }, new { privApplicationId = @ViewBag.PrivApplicationId })

但是，每次进入ActionResult时，privApplicationId值都为null。

Controller ActionResult：

 public ActionResult ViewComments(long? privApplicationId)

你能帮帮我吗？

Answer 1

从@删除ViewBag并将null作为最后一个参数传递。 这应该工作

@Html.ActionLink("Comments", 
                 "ViewComments", 
                 "SubmittedApplications", 
                  new 
                  { 
                      area = "Privileging", 
                      privApplicationId = ViewBag.PrivApplicationId 
                  }, 
                  null)

Answer 2

你选择了ActionLink助手的错误重载。 new { privApplicationId = @ViewBag.PrivApplicationId }作为htmlAttribute参数传递，但应为routeValue。试试这个：

@Html.ActionLink("Comments", "ViewComments", "SubmittedApplications",
      new { area = "Privileging", privApplicationId = @ViewBag.PrivApplicationId }, null)