我有以下代码,但是错误causght没有显示.哪里不对 ？
public ActionResult DeleteRateGroup(int id)
{
try
{
RateGroup.Load(id).Delete();
RateGroupListModel list = new RateGroupListModel();
return GetIndexView(list);
}
catch (Exception e)
{
RateGroupListModel model = new RateGroupListModel();
if (e.InnerException != null)
{
if (e.InnerException.Message.Contains("REFERENCE constraint"))
ModelState.AddModelError("Error","The user has related information and cannot be deleted.");
}
else
{
ModelState.AddModelError("Error",e.Message);
}
return RedirectToAction("RateGroup",model);
}
}
@model MvcUI.Models.RateGroupListModel
@{
View.Title = "RateGroup";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>Rate Group</h2>
@Html.ValidationSummary()
@using (Html.BeginForm())
private ActionResult GetIndexView(RateGroupListModel model)
{
return View("RateGroup",model);
}
public ActionResult RateGroup(RateGroupListModel model)
{
return GetIndexView(model);
}
解决方法
看起来你正在设置ModelState错误,然后重定向到另一个操作.我确定当你这样做时,ModelState会丢失.
通常,您只需从DeleteRateGroup操作直接呈现RateGroup视图,而不需要重定向,如果需要,请传入模型,如下所示：
return View("RateGroup",model);
如果您希望ModelState与您进行第二个操作,请查看MvcContrib的ModelStateToTempDataAttribute.这是属性的描述,从MvcContrib源代码的意见：
When a RedirectToRouteResult is returned from an action,anything in the ViewData.ModelState dictionary will be copied into TempData. When a ViewResultBase is returned from an action,any ModelState entries that were prevIoUsly copied to TempData will be copied back to the ModelState dictionary.
