参见英文答案 “Child actions are not allowed to perform redirect actions”6个 我收到以下错误： Child actions are not allowed to perform redirect actions.Description: An unhandled exception occurred during the execution of t
我收到以下错误：
Child actions are not allowed to perform redirect actions.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidOperationException: Child actions are not allowed to perform redirect actions.
Source Error:
Line 1: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<RenderActionViewModel>" %>
Line 2: <%Html.RenderAction(Model.ActionName, Model.ControllerName, Model.RouteValues); %>
Line 3:
The Stack trace is:
[InvalidOperationException: Child actions are not allowed to perform redirect actions.]
System.Web.Mvc.RedirectResult.ExecuteResult(ControllerContext context) +700064
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +727764
System.Web.Mvc.Controller.ExecuteCore() +159
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +334
System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +62
System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +15
System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +52
System.Web.Mvc.<>c__DisplayClass4.<Wrap>b__3() +15
System.Web.Mvc.ServerExecuteHttpHandlerWrapper.Wrap(Func`1 func) +41
System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride) +1411
[HttpException (0x80004005): Error executing child request for handler 'System.Web.Mvc.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'.]
System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride) +2819
System.Web.HttpServerUtility.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage) +275
System.Web.HttpServerUtilityWrapper.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm) +94
System.Web.Mvc.Html.ChildActionExtensions.ActionHelper(HtmlHelper htmlHelper, String actionName, String controllerName, RouteValueDictionary routeValues, TextWriter textWriter) +828
System.Web.Mvc.Html.ChildActionExtensions.RenderAction(HtmlHelper htmlHelper, String actionName, String controllerName, RouteValueDictionary routeValues) +56
ASP.views_shared_renderaction_ascx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in c:\TFS\PEEP\Src\Main\Hosts\BCA.PEEP.WebSite\Views\Shared\RenderAction.ascx:2
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +131
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +150
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +12742749
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +249
System.Web.UI.Page.Render(HtmlTextWriter writer) +40
System.Web.Mvc.ViewPage.Render(HtmlTextWriter writer) +65
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +150
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +12742749
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5363
我在第2行得到错误的RenderAction.ascx代码是：
<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<RenderActionViewModel>" %>
<%Html.RenderAction(Model.ActionName, Model.ControllerName, Model.RouteValues); %>
控制器中的Action是：
public ViewResult DashboardQuicksearch(UserFilter userFilter, bool? showAdvancedSearchLink)
{
int resultCount;
List<KeyInfo<string>> makeList = quickSearchProvider.GetKeysForCriteriaKey(SearchType.Vehicle, "MakeName", userFilter, "null", false, null, out resultCount);
var selectListItems = new List<SelectListItem>();
foreach (KeyInfo<string> item in makeList)
{
selectListItems.Add(new SelectListItem() { Text = item.Key, Value = item.Key, Selected = false });
}
var viewModel = new DashboardQuicksearchViewModel() {
MakeList = (makeList.Count == 1)
? new SelectList(selectListItems, "Value", "Text", selectListItems[0].Value)
: new SelectList(selectListItems, "Value", "Text"),
VehicleCount = quickSearchProvider.GetLotItemCount("null", userFilter),
ShowAdvancedSearchLink = (showAdvancedSearchLink.HasValue ? showAdvancedSearchLink.Value : false)
};
return View(Constants.Views.Search.DashboardQuicksearch, viewModel);
}
我完全不知道如何解决它.
编辑：
这是DashboardQuickSearch.ascx
<%@ Control Language="C#" Inherits="BCA.PEEP.Web.UI.ViewUserControlBase<DashboardQuicksearchViewModel>" %>
<%@ Import Namespace="BCA.PEEP.Web.Mvc" %>
<div class="Makes">
<%:(Model.MakeList.Count() == 1
? Html.DropDownList("Makes", Model.MakeList, new {@class="search-select"})
: Html.DropDownList("Makes", Model.MakeList, Html.Text("Name of search results filter:SelectMake"), new {@class="search-select"})
) %>
</div>
<div class="Models"><%:Html.DropDownList("Models", new List<SelectListItem>(), Html.Text("Name of search results filter:SelectModel"), new { disabled = "disabled", @class="search-select"})%></div>
<div class="ResultAndAction">
<span id="VehicleCount" class="VehicleCount"><span class="count-number"><%:Model.VehicleCount.ToString("N0") %></span> <%: Html.Text(Model.VehicleCount, "SearchResultsLabels:Vehicles singular", "SearchResultsLabels:Vehicles plural")%></span>
<div id="QSButtonDiv" class="Button">
<input id="QSButton" type="button" value ="<%:Html.Text("Text on buttons:search")%>" onclick="ExecuteSearch()" disabled="disabled" />
</div>
<% if (Model.ShowAdvancedSearchLink) { %>
<div id="ASButtonDiv" class="Button Hidden">
<input id="ASButton" type="button" value ="<%:Html.Text("Text on links:AdvancedSearch")%>" onclick="AdvancedSearch()" />
</div>
<% } %>
</div>
<script type="text/javascript">
$(document).ready(function () {
var vehiclesSingular = '<%=Html.Text("SearchResultsLabels:Vehicles singular")%>';
var vehiclesPlural = '<%=Html.Text("SearchResultsLabels:Vehicles plural")%>';
var makeCount = '<%=Model.MakeList.Count().ToString("N0") %>';
$('#Makes').change(function () { PopulateModels(); });
$('#Models').change(function () { UpdateVehicleCount(); });
$('#Makes').trigger('change');
function PopulateModels() {
var make = $('#Makes').val();
var $models = $('#Models');
$models.append('<option value="" selected>' + '<%=Html.Text("Name of search results filter:SelectModel") %>' + '</option>');
//alert("Populate Models - Make = '" + make + "'");
if (make == '') {
$models.attr('disabled', 'disabled');
$models.find('option').remove();
$models.append('<option value="" selected>' + '<%=Html.Text("Name of search results filter:SelectModel") %>' + '</option>');
$models.val('');
UpdateVehicleCount();
$('#QSButton').attr('disabled', 'disabled');
$('#QSButtonDiv').removeClass('PrimaryButton').addClass('Button');
return;
}
$.ajax({
type: 'GET',
url: '/Search/GetModelsForMake/',
data: { MakeName: make },
dataType: "json",
success: function (results) {
$models.find('option').remove();
$models.append('<option value="" selected>' + '<%=Html.Text("Labels for vehicle characteristics:All Models") %>' + '</option>');
$(results.Models).each(function (index, model) {
$models.append('<option value="' + model + '">' + model + '</option>');
});
DisplayVehicleCount(results.VehicleCount);
}
});
$models.removeAttr('disabled');
$('#QSButton').removeAttr('disabled', 'disabled');
$('#QSButtonDiv').removeClass('Button').addClass('PrimaryButton');
}
function UpdateVehicleCount() {
var make = $('#Makes').val();
var model = $('#Models').val();
$.ajax({
type: 'GET',
url: '/Search/GetMakeModelCount/',
data: { MakeName: make, ModelName: model },
dataType: "json",
success: function (result) {
DisplayVehicleCount(result);
}
});
}
function DisplayVehicleCount(vehicleCount) {
var vehicles = (vehicleCount == '1') ? vehiclesSingular : vehiclesPlural;
$('#VehicleCount').html('<span class="count-number">' + vehicleCount + '</span>' + ' ' + vehicles);
}
});
function ExecuteSearch() {
var make = $('#Makes').val();
var model = $('#Models').val();
if (make == '')
return;
window.location = '/Quicksearch/Vehicles?make=' + make + '&model=' + model;
}
function AdvancedSearch() {
<% if(AmbientContextHelper.CurrentBrand.Name.ToLower().Contains("alphabet"))
{ %>
window.location = '/SearchVehicle';
<% } else
{ %>
window.location = '/Quicksearch/Vehicles';
<% } %>
}
</script>
这意味着：
>已处理与URL对应的操作,并返回了视图结果.
> ASP.NET MVC的视图引擎已经开始呈现视图,可能会将标题和部分HTML发送到浏览器.
>视图引擎遇到了RenderAction(…)调用,并已开始执行该操作.
>该操作已尝试将重定向HTTP状态代码返回给浏览器
在这一点上,ASP.NET不知所措：它已经开始向客户端发送标题和HTML,但现在突然被告知要回忆所有这些,而是发送重定向状态代码.它显然无法做到这一点,所以它抛出一个异常.
您将不得不弄清楚为什么会触发重定向并确保不会发生这种情况.最可能的原因(但绝不是唯一可能的原因)是一些自定义操作过滤器,其设计不考虑子操作. ASP.NET MVC操作筛选器通常会检查执行操作是否已作为子操作调用,并避免在此类方案中重定向.