C# System.InvalidOperationException:ExecuteReader需要打开且可用的连接。连接'；它的当前状态是开放的
嗨，所以我在日志中出现了一个错误，有些功能有时会被破坏，尽管是间歇性的 完整堆栈跟踪如下所示： System.Data.Entity.Core.EntityCommandExecutionException:执行命令定义时出错。有关详细信息，请参见内部异常。-->System.InvalidOperationException:ExecuteReader需要打开且可用的连接。连接的当前状态为“打开”。在System.Data.SqlClient.SqlConnection.GetOpenConnection（字符串方法）在System.Data.SqlClient.SqlConnection.ValidateConnectionForExecute（字符串方法，SqlCommand）在System.Data.SqlClient.SqlCommand.ValidateCommand（字符串方法，布尔异步）在System.Data.SqlClient.SqlCommand.RunExecuteReader（CommandBehavior cmdBehavior、RunBehavior RunBehavior、Boolean returnStream、String方法、TaskCompletionSourceC# System.InvalidOperationException:ExecuteReader需要打开且可用的连接。连接'；它的当前状态是开放的,c#,asp.net,sql-server,asp.net-mvc,C#,Asp.net,Sql Server,Asp.net Mvc,嗨，所以我在日志中出现了一个错误，有些功能有时会被破坏，尽管是间歇性的 完整堆栈跟踪如下所示： System.Data.Entity.Core.EntityCommandExecutionException:执行命令定义时出错。有关详细信息，请参见内部异常。-->System.InvalidOperationException:ExecuteReader需要打开且可用的连接。连接的当前状态为“打开”。在System.Data.SqlClient.SqlConnection.GetOpenConn
1完成、Int32超时、任务和任务、Boolean和usedCache、Boolean asyncWrite、Boolean inRetry）位于System.Data.SqlClient.SqlCommand.RunExecuteReader（CommandBehavior cmdBehavior、RunBehavior RunBehavior、Boolean returnStream、String方法）在System.Data.SqlClient.SqlCommand.ExecuteReader（CommandBehavior行为、String方法）在System.Data.Entity.Infrastructure.InternalDispatcher3操作，TinterContext interceptionContext，Action3执行，Action3执行）在System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStorommands（EntityCommand EntityCommand，CommandBehavior）——内部异常堆栈跟踪的末尾——在System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStorommands（EntityCommand EntityCommand，CommandBehavior行为）在System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute[TResultType]（ObjectContext上下文，ObjectParameterCollection参数值）的System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T]（Func
1 Func，IDbExecutionStrategy executionStrategy，Boolean startLocalTransaction，Boolean releaseConnectionOnSuccess）位于System.Data.Entity.Core.Objects.ObjectQuery1.c_uDisplayClass7.b_u5（）位于System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult]（Func
1操作）在System.Data.Entity.Core.Objects.ObjectQuery中，在System.Data.Entity.Core.Objects.DataClasses.EntityCollection中，在System.Data.Entity.Core.Objects.DataClasses中，在System.Data.Entity.Core.Objects.DataClasses中，在System.Data.Data.Entity.Core.Objects.DataClasses中，在System.Data.Data.Core.Object中，在System.Data.Data.DataClasses中，在System.DataClasses中，在System.Data.Data在System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.LoadProperty[TItem]（TItem propertyValue，String relationshipName，String targetRoleName，Boolean mustBeNull，Object wrapperObject）的System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.c_u显示类72.b_uuu1（TProxy代理，TItem项）在System.Data.Entity.DynamicProxies.Product_49EFA7CB993633FA6F92A211A42F2C206E79CC0974B0D20D2E9E66248C8DC082.get_ProductSpecificationAttributes（）在Nop.Plugin.Widgets.Enhancements.Controllers.ProductController.ProductDetail_SizeDropDownstocklevelsOveral（Int32 productId，String productColor）在lambda_方法（闭包，ControllerBase，Object[]）在System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod（ControllerContext ControllerContext，IDictionary2参数）在System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod（ControllerContext ControllerContext，ActionDescriptor ActionDescriptor，IDictionary2参数）在System.Web.Mvc.Async.AsyncControllerActionInvoker.b_39（IAsyncResult asyncResult，ActionInvocation innerInvokeState）位于System.Web.Mvc.Async.AsyncResultRapper.WrappedAsyncResult
2.CallEndDelegate（IAsyncResult asyncResult asyncResult）位于System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod（IAsyncResult asyncResult asyncResult）System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.b_uu3D（）位于System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.c_uDisplayClass46.b_u3f（）位于System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.c_uDisplayClass46.b_u3f（）在System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvokwithFilters.c_uuDisplayClass46.b_u3f（）在System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvokwithFilters.c_uDisplayClass46.b_u3f（）在System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvokwithFilters.c_uDisplayClass46.b_u3f（）上在System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvokwithFilters.c_uuDisplayClass46.b_u3f（）在System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvokwithFilters.c_uDisplayClass46.b_u3f（）在System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvokwithFilters.c_uDisplayClass46.b_u3f（）上在System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters（IAsyncResult asyncResult）在System.Web.Mvc.Async.AsyncControllerActionInvoker.c_uuDisplayClass21.c_uuDisplayClass2B.b_u1;1c（）在System.Web.Mvc.Async.Async.AsyncControllerActionInvoker.c_uDisplayClass21.b_1e（IAsyncResult asyncResult asyncResult）在System.Web.Mvc.Controller.b_u1d（IAsyncResult asyncResult，ExecuteCorerate innerState）的System.Web.Mvc.Async.asyncResult Async.Async.AsyncControllerActionInvoker.EndInvokeAction（IAsyncResult asyncResult）中在System.Web.Mvc.Controller.EndExecuteCore中调用（IAsyncResult asyncResult asyncResult asyncResult）（IAsyncResult asyncResult）位于System.Web.Mvc.Async.asyncResult Rapper.WrappedAsyncVoid
1.CallEndDelegate（IAsyncResult asyncResult）位于System.Web.Mvc.Controller.EndExecute（IAsyncResult asyncResult）位于System
[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
});
}
var childProducts = _cacheManager.Get("CHILD_PRODUCTS_" + parentProductId, () => _productService.GetAssociatedProducts(parentProductId));
System.Data.Entity.Core.Objects.DataClasses.RelatedEnd.DeferredLoad()
at System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.LoadProperty[TItem]