Question

我有以下PagedListModel：

public class PagedClientViewModel
{
    public int? Page { get; set; }
    public PagedList.IPagedList<ClientViewModel> Clients { get; set; }               
}

public class ClientViewModel
{        
    public string ClientNumber { get; set; }
    public bool UseThisClient{ get; set; }
}

我的观点如下：

@using (Html.BeginForm("Index", "Home", FormMethod.Get, new { id = "Form" }))
{
    @foreach (var item in Model.Clients)
    {
       @Html.DisplayFor(modelItem => item.ClientNumber)
       @Html.CheckBoxFor(modelItem => item.UseThisClient)
    }    

 @Html.HiddenFor(model => model.Clients)            
}

控制器操作：

 public ActionResult Index(PagedClientViewModel model)
 {
  //...process all clients in the list
 }

我想将模型发布回控制器，以便我可以处理已勾选的复选框，但是我收到以下错误：我有点明白错误是因为我回发了一个界面但我不能找到解决办法。我怎样才能完成这项工作？

无法创建接口的实例。在   System.RuntimeTypeHandle.CreateInstance（RuntimeType类型，布尔值   publicOnly，Boolean noCheck，Boolean＆amp; canBeCached，   RuntimeMethodHandleInternal＆安培; ctor，布尔＆amp; bNeedSecurityCheck）at   System.RuntimeType.CreateInstanceSlow（Boolean publicOnly，Boolean   skipCheckThis，Boolean fillCache，StackCrawlMark＆amp; stackMark）at   System.RuntimeType.CreateInstanceDefaultCtor（Boolean publicOnly，   Boolean skipCheckThis，Boolean fillCache，StackCrawlMark＆amp; stackMark）
  在System.Activator.CreateInstance（Type type，Boolean nonPublic）
  在System.Activator.CreateInstance（Type type）at   System.Web.Mvc.DefaultModelBinder.CreateModel（ControllerContext   controllerContext，ModelBindingContext bindingContext，Type modelType）   在System.Web.Mvc.DefaultModelBinder.BindSimpleModel（ControllerContext）   controllerContext，ModelBindingContext bindingContext，   ValueProviderResult valueProviderResult）at   System.Web.Mvc.DefaultModelBinder.BindModel（ControllerContext   controllerContext，ModelBindingContext bindingContext）at   System.Web.Mvc.DefaultModelBinder.GetPropertyValue（ControllerContext   controllerContext，ModelBindingContext bindingContext，   PropertyDescriptor propertyDescriptor，IModelBinder propertyBinder）
  在System.Web.Mvc.DefaultModelBinder.BindProperty（ControllerContext   controllerContext，ModelBindingContext bindingContext，   PropertyDescriptor propertyDescriptor）at   System.Web.Mvc.DefaultModelBinder.BindProperties（ControllerContext   controllerContext，ModelBindingContext bindingContext）at   System.Web.Mvc.DefaultModelBinder.BindComplexElementalModel（ControllerContext   controllerContext，ModelBindingContext bindingContext，Object model）
  在   System.Web.Mvc.DefaultModelBinder.BindComplexModel（ControllerContext   controllerContext，ModelBindingContext bindingContext）at   System.Web.Mvc.DefaultModelBinder.BindModel（ControllerContext   controllerContext，ModelBindingContext bindingContext）at   System.Web.Mvc.ControllerActionInvoker.GetParameterValue（ControllerContext   controllerContext，ParameterDescriptor parameterDescriptor）at   System.Web.Mvc.ControllerActionInvoker.GetParameterValues（ControllerContext   controllerContext，ActionDescriptor actionDescriptor）at   System.Web.Mvc.Async.AsyncControllerActionInvoker＆LT;＆GT; C_ DisplayClass25.b _1e（的AsyncCallback   asyncCallback，Object asyncState）at   System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult 1.Begin(AsyncCallback callback, Object state, Int32 timeout) at System.Web.Mvc.Async.AsyncControllerActionInvoker.BeginInvokeAction(ControllerContext controllerContext, String actionName, AsyncCallback callback, Object state) at System.Web.Mvc.Controller.<>c__DisplayClass1d.<BeginExecuteCore>b__17(AsyncCallback asyncCallback, Object asyncState) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult 1.Begin（的AsyncCallback   回调，对象状态，Int32超时）at   System.Web.Mvc.Controller.BeginExecuteCore（AsyncCallback回调，   对象状态）   System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult 1.Begin(AsyncCallback callback, Object state, Int32 timeout) at System.Web.Mvc.Controller.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) at System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) at System.Web.Mvc.MvcHandler.<>c__DisplayClass8.<BeginProcessRequest>b__2(AsyncCallback asyncCallback, Object asyncState) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult 1.Begin（的AsyncCallback   回调，对象状态，Int32超时）at   System.Web.Mvc.MvcHandler.BeginProcessRequest（HttpContextBase   httpContext，AsyncCallback回调，对象状态）at   System.Web.Mvc.MvcHandler.BeginProcessRequest（HttpContext httpContext，   AsyncCallback回调，对象状态）   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest（HttpContext的   context，AsyncCallback cb，Object extraData）at   System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）   在System.Web.HttpApplication.ExecuteStep（IExecutionStep步骤，   布尔和放大器; completedSynchronously）

Answer 1

解决此问题的方法是将分页元数据作为单独的属性传递，并在视图中重建IPagedList。如下所示

public class PagedClientViewModel
{
    public int? Page { get; set; }
    public List<ClientViewModel> Clients { get; set; }
    public IPagedList PagingMetaData { get; set; } 
}

创建元数据

pagedClientViewModel.PagingMetaData = new StaticPagedList<ClientViewModel>(pagedClientViewModel.Clients, pageIndex, pageSize, TotalClients).GetMetaData();

在视图中构建寻呼机

<div style="text-align: center">
    @Html.PagedListPager(new StaticPagedList<ClientViewModel>(Model.Clients, Model.PagingMetaData), page => Url.Action("<actionname>", new { page }), PagedListRenderOptions.Classic)
</div>

MVC发布IPagedList

1 个答案: