嗨所以我在日志中出现错误，并且某些功能有时会损坏，但它是间歇性的。
完整的堆栈跟踪看起来是这样的：
System.Data.Entity.Core.EntityCommandExecutionException：执行命令定义时出错。有关详细信息，请参阅内部异常。---> System.InvalidOperationException: ExecuteReader 需要一个打开且可用的连接。连接的当前状态是打开的。在 System.Data.SqlClient.SqlConnection.GetOpenConnection(String method) 在 System.Data.SqlClient.SqlConnection.ValidateConnectionForExecute(String method, SqlCommand command) 在 System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async) 在 System .Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String 方法, TaskCompletionSource
1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) at System.Data.Entity.Infrastructure.Interception.InternalDispatcher1.Dispatch[TTarget,TInterceptionContext,TResult](TTarget 目标, Func3 operation, TInterceptionContext interceptionContext, Action3 执行, Action3 executed) at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader(DbCommand command, DbCommandInterceptionContext interceptionContext) at System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) --- End of inner exception stack trace --- at System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) at System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute[TResultType](ObjectContext context, ObjectParameterCollection parameterValues) at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) 在 System.Data.Entity.Core.Objects.ObjectQuery1.<>c__DisplayClass7.<GetResults>b__5() at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func1 操作) 在 System.Data.Entity.Core.Objects.ObjectQuery1.GetResults(Nullable1 forMergeOption) 在 System.Data.Entity.Core .Objects.DataClasses.EntityCollection1.Load(List1 集合，MergeOption mergeOption) 在 System.Data.Entity.Core.Objects.DataClasses.RelatedEnd.DeferredLoad() 在 System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.LoadProperty[TItem]( TItem propertyValue, String relationshipName, String targetRoleName, Boolean mustBeNull, Object wrapperObject) at System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.<>c__DisplayClass72.<GetInterceptorDelegate>b__1(TProxy proxy, TItem item) at System.Data.Entity.DynamicProxies.Product_49EFA7CB993633FA6F92A211A42F2C206E79CC0974B0D20D2E9E66248C8DC082.get_ProductSpecificationAttributes() at Nop.Plugin.Widgets.Enhancements.Controllers.ProductController.ProductDetail_SizesDropDownStockLevelsOverall(Int32 productId, String productColor) at lambda_method(Closure , ControllerBase , Object[] ) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary2个参数）在System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary2 parameters) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult2.CallEndDelegate(IAsyncResult asyncResult) 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.b__3d() 在 System.Web.Mvc.Async.AsyncControllerActionInvoker。 AsyncInvocationWithFilters.<>c__DisplayClass46.b__3f() 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass46.b__3f() 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass46.b__3f() 在System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass46.b__3f() 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass46.b__3f() 在 System.Web.Mvc.Async.AsyncControllerActionInvoker。AsyncInvocationWithFilters.<>c__DisplayClass46.b__3f() 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass46.b__3f() 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass46.b__3f() 在System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass21.<>c__DisplayClass2b.b__1c() 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.<> c__DisplayClass21.b__1e(IAsyncResult asyncResult) 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) 在 System.Web.Mvc.Controller.b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) 在 System.Web.Mvc.Async.AsyncResultWrapper .WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) at System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) 在 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) 在 System.Web.Mvc.MvcHandler.b__5(IAsyncResult asyncResult, ProcessRequestState innerState) 在 System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncVoid `1.CallEndDelegate(IAsyncResult asyncResult) 在 System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) 在 System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() 在 System.Web.HttpApplication.ExecuteStepImpl （IExecutionStep 步骤）在 System.Web.HttpApplication.ExecuteStep（IExecutionStep 步骤，Boolean& completedSynchronously）
我在连接字符串中看到了一些关于多个活动结果集的解决方案，但显然这是一种解决方法，而不是解决方案。
堆栈跟踪将我带到这部分代码，尽管我不能完全弄清楚它是什么。
[HttpPost]
public ActionResult ProductDetail_SizesDropDown(int productId, string productColor)
{
string dropdownOptions = "";
string dropdownOptionsSizes = "";
var allSizes = new List<Tuple<string, int>>();
var product = _productService.GetProductById(productId);
if (product == null)
{
return Json(new
{
success = false
});
}
var parentProductId = (product.ParentGroupedProductId > 0) ? product.ParentGroupedProductId : productId;
var childProducts = _cacheManager.Get("CHILD_PRODUCTS_" + parentProductId, () => _productService.GetAssociatedProducts(parentProductId));
if (childProducts.Count() == 0)
{
return Json(new
{
success = false
});
}
foreach (var childProduct in childProducts)
{
var sizeSpec =
childProduct.ProductSpecificationAttributes.FirstOrDefault(
x => x.SpecificationAttributeOption != null && x.SpecificationAttributeOption.SpecificationAttribute != null && x.SpecificationAttributeOption.SpecificationAttribute.Name == "Size");
if (sizeSpec != null)
{
var size = this.GetSpecValue(sizeSpec);
allSizes.Add(new Tuple<string, int>(size, sizeSpec.SpecificationAttributeOption.DisplayOrder));
}
}
allSizes = allSizes.Distinct().OrderBy(x => x.Item2).ToList();
var countSizes = 0;
foreach (var sizeTuple in allSizes)
{
var size = sizeTuple.Item1;
var disabled = "";
var selected = "";
var sizeProduct = _cacheManager.Get("SIZE_PRODUCT_" + parentProductId + "_" + sizeTuple.Item1 + "_" + productColor, 60, () =>
{
if (!String.IsNullOrEmpty(productColor))
{
return _productService.GetAssociatedProducts(parentProductId).FirstOrDefault(x =>
x.ProductSpecificationAttributes.Any(psa =>
psa.SpecificationAttributeOption != null && psa.SpecificationAttributeOption.SpecificationAttribute != null && psa.SpecificationAttributeOption.Name == sizeTuple.Item1 &&
psa.SpecificationAttributeOption.SpecificationAttribute.Name == "Size") &&
x.ProductSpecificationAttributes.Any(psa =>
psa.SpecificationAttributeOption != null && psa.SpecificationAttributeOption.SpecificationAttribute != null && psa.SpecificationAttributeOption.Name == productColor &&
psa.SpecificationAttributeOption.SpecificationAttribute.Name == "Colour"));
}
else
{
return _productService.GetAssociatedProducts(parentProductId).FirstOrDefault(x =>
x.ProductSpecificationAttributes.Any(psa =>
psa.SpecificationAttributeOption != null && psa.SpecificationAttributeOption.SpecificationAttribute != null && psa.SpecificationAttributeOption.Name == sizeTuple.Item1 &&
psa.SpecificationAttributeOption.SpecificationAttribute.Name == "Size"));
}
});
// No size child exists for this product so we don't add to the dropdown
if (sizeProduct == null)
continue;
var sizeLabel = size;
if (sizeProduct != null)
{
var stockLabel = RefreshProductStockLabel(sizeProduct.Id, false);
if (stockLabel.ToLower().Contains("out of stock"))
{
stockLabel = "Out of stock";
}
if (stockLabel.ToLower() == "out of stock" || stockLabel.ToLower() == "low stock")
{
sizeLabel += " <strong class=\"" + stockLabel.ToLower().Replace(" ", "-") + "\">" + stockLabel + "</strong>";
}
if (stockLabel.ToLower() == "out of stock" && !sizeProduct.PreorderAvailableNew)
{
disabled = " disabled='disabled'";
selected = "";
}
}
dropdownOptionsSizes += String.Format("<option value='{0}'{2}{3} data-text='{1}'>{0}</option>",
HttpUtility.HtmlEncode(size.Replace("\"", "")), HttpUtility.HtmlEncode(sizeLabel), disabled, selected);
countSizes++;
}
dropdownOptions = "<option value=''>Choose from " + countSizes + " sizes</option>" + dropdownOptionsSizes;
return Json(new
{
success = true,
dropdownOptions
});
}
我想我可能需要用来列出，当我拿孩子产品时，虽然我不确定。
var childProducts = _cacheManager.Get("CHILD_PRODUCTS_" + parentProductId, () => _productService.GetAssociatedProducts(parentProductId));
任何指导将不胜感激。谢谢