多个 DataReader 错误，在本地工作但在发布版本上不工作
Multiple DataReader Error, works locally but not on published version
当 运行 这在本地工作正常，但在发布和 运行 之后我得到 "There is already an open DataReader associated with this Command which must be closed first."
有没有一种正确的方法可以使用相同的集合数据在不同的表上生成多个对象？
这可能本质上是处理这种情况的错误方法。
我基本上也使用一个对象形式的信息来创建另一个对象。
本地主机和发布版本使用相同的连接字符串。我试过将 MARS 设置为 true
[HttpPost]
[ValidateAntiForgeryToken]
[ActionFilters.AuditInventory]
public ActionResult Create([Bind(Include = "CheckoutID,Date,Provider,Injection,Patient,Chart,Location,Lot,Restocked,Authorized,Accountable,Quantity")] CheckOutInjectionViewModel checkOutInjectionViewModel)
{
foreach (var i in db.Inventories)
{
if (i.Location_Injection.Bottle == null)
{
if (i.Location_Injection.Location.Location == checkOutInjectionViewModel.Location && i.Location_Injection.Injection.Injection == checkOutInjectionViewModel.Injection)
{
i.Quantity -= checkOutInjectionViewModel.Quantity;
}
}
}
if (ModelState.IsValid)
{
db.CheckedOutInjections.Add(checkOutInjectionViewModel);
db.SaveChanges();
var injection = new Injections
{
Accountable = checkOutInjectionViewModel.Accountable,
Date = checkOutInjectionViewModel.Date,
Injection = checkOutInjectionViewModel.Injection,
Location = checkOutInjectionViewModel.Location,
MySignature = checkOutInjectionViewModel.MySignature,
Provider = checkOutInjectionViewModel.Provider,
Quantity = checkOutInjectionViewModel.Quantity,
};
db.InjectionsAggregate.Add(injection);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(checkOutInjectionViewModel);
}
堆栈跟踪
[InvalidOperationException: There is already an open DataReader associated with this Command which must be closed first.]
System.Data.SqlClient.SqlInternalConnectionTds.ValidateConnectionForExecute(SqlCommand command) +2076159
System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async) +328
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry) +161
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +121
System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +202
System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch(TTarget target, Func`3 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed) +104
System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader(DbCommand command, DbCommandInterceptionContext interceptionContext) +505
System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) +37
[EntityCommandExecutionException: An error occurred while executing the command definition. See the inner exception for details.]
System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) +126
System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute(ObjectContext context, ObjectParameterCollection parameterValues) +1047
System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction(Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) +469
System.Data.Entity.Core.Objects.<>c__DisplayClass7.<GetResults>b__5() +205
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func`1 operation) +238
System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) +349
System.Data.Entity.Core.Objects.DataClasses.EntityReference`1.Load(MergeOption mergeOption) +188
System.Data.Entity.Core.Objects.DataClasses.RelatedEnd.DeferredLoad() +449
System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.LoadProperty(TItem propertyValue, String relationshipName, String targetRoleName, Boolean mustBeNull, Object wrapperObject) +131
System.Data.Entity.Core.Objects.Internal.<>c__DisplayClass7`2.<GetInterceptorDelegate>b__2(TProxy proxy, TItem item) +151
System.Data.Entity.DynamicProxies.Inventory_AAF69D7ACE3EC0D7440AC81F5B4FEF9AA1625FB9547A97AF87B7EEE3DB9F6C07.get_Location_Injection() +39
Hughston_Injections.Controllers.CheckOutInjectionViewModelsController.Create(CheckOutInjectionViewModel checkOutInjectionViewModel) +123
lambda_method(Closure , ControllerBase , Object[] ) +139
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +209
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +35
System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +39
System.Web.Mvc.Async.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult) +67
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +42
System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +72
System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +386
System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +386
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +42
System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +30
System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +186
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38
System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +29
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +65
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +53
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +36
System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38
System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +44
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +65
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +399
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +157
这是我想出的解决方案，仅当 运行 从我发布到的服务器上时，我才继续收到打开的 DataReader 错误，在本地一切正常 运行。
将所有内容转换为 sql 命令后，我要做的最后一件事是移动引用数据库上下文（在控制器中声明）的 foreach 循环，并且必须在我将更改保存到新的上下文实例，例如在尝试之前仍然会导致失败。
[HttpPost]
[ValidateAntiForgeryToken]
[ActionFilters.AuditInventory]
public ActionResult Create([Bind(Include = "CheckoutID,Date,Provider,Injection,Patient,Chart,Location,Lot,Restocked,Authorized,Accountable,Quantity")] CheckOutInjectionViewModel checkOutInjectionViewModel)
{
if (ModelState.IsValid)
{
StringBuilder sb = null;
using (SqlConnection conn = new SqlConnection("CONNECTION_STRING"))
{
try
{
sb = new StringBuilder("INSERT INTO Injections VALUES (");
sb.Append("'" + (checkOutInjectionViewModel.Date.HasValue ? checkOutInjectionViewModel.Date.Value.ToString("yyyy-MM-dd") : "1999-01-01") + "',");
sb.Append("'" + checkOutInjectionViewModel.Provider + "', ");
sb.Append("'" + checkOutInjectionViewModel.Quantity.ToString() + "', ");
sb.Append("'" + checkOutInjectionViewModel.Accountable + "', ");
sb.Append("'" + checkOutInjectionViewModel.Location + "', ");
sb.Append("NULL,");
sb.Append("'" + checkOutInjectionViewModel.Injection + "');");
sb.Append("INSERT INTO CheckOutInjectionViewModels VALUES (");
sb.Append("'" + (checkOutInjectionViewModel.Date.HasValue ? checkOutInjectionViewModel.Date.Value.ToString("yyyy-MM-dd") : "1999-01-01") + "',");
sb.Append("'" + checkOutInjectionViewModel.Patient + "', ");
sb.Append("'" + checkOutInjectionViewModel.Chart + "', ");
sb.Append("'" + checkOutInjectionViewModel.Lot + "', ");
sb.Append("'FALSE',");
sb.Append("NULL,");
sb.Append("'FALSE',");
sb.Append("'" + checkOutInjectionViewModel.Provider + "', ");
sb.Append("'" + checkOutInjectionViewModel.Injection + "', ");
sb.Append("'" + checkOutInjectionViewModel.Location + "', ");
sb.Append("'" + checkOutInjectionViewModel.Accountable + "', ");
sb.Append("'" + checkOutInjectionViewModel.Quantity.ToString() + "', ");
sb.Append("NULL);");
conn.Open();
var context = new ApplicationDbContext();
context.Database.ExecuteSqlCommand(sb.ToString());
context.SaveChanges();
foreach (var i in db.Inventories)
{
if (i.Location_Injection.Bottle == null)
{
if (i.Location_Injection.Location.Location == checkOutInjectionViewModel.Location && i.Location_Injection.Injection.Injection == checkOutInjectionViewModel.Injection)
{
i.Quantity -= checkOutInjectionViewModel.Quantity;
}
}
}
}
catch (Exception ex)
{
ViewBag.Error = ex.Message + Environment.NewLine + sb.ToString();
ViewBag.Locations = new SelectList(db.Locations, "Location", "Location");
ViewBag.Providers = new SelectList(db.Providers, "Provider", "Provider");
ViewBag.Injections = new SelectList(db.Injections, "Injection", "Injection");
ViewBag.Accountables = new SelectList(db.Accountables, "Accountable", "Accountable");
}
finally
{
conn.Close();
}
return RedirectToAction("Index");
}
}
return View(checkOutInjectionViewModel);
}
当 运行 这在本地工作正常，但在发布和 运行 之后我得到 "There is already an open DataReader associated with this Command which must be closed first."
有没有一种正确的方法可以使用相同的集合数据在不同的表上生成多个对象？
这可能本质上是处理这种情况的错误方法。
我基本上也使用一个对象形式的信息来创建另一个对象。
本地主机和发布版本使用相同的连接字符串。我试过将 MARS 设置为 true
[HttpPost]
[ValidateAntiForgeryToken]
[ActionFilters.AuditInventory]
public ActionResult Create([Bind(Include = "CheckoutID,Date,Provider,Injection,Patient,Chart,Location,Lot,Restocked,Authorized,Accountable,Quantity")] CheckOutInjectionViewModel checkOutInjectionViewModel)
{
foreach (var i in db.Inventories)
{
if (i.Location_Injection.Bottle == null)
{
if (i.Location_Injection.Location.Location == checkOutInjectionViewModel.Location && i.Location_Injection.Injection.Injection == checkOutInjectionViewModel.Injection)
{
i.Quantity -= checkOutInjectionViewModel.Quantity;
}
}
}
if (ModelState.IsValid)
{
db.CheckedOutInjections.Add(checkOutInjectionViewModel);
db.SaveChanges();
var injection = new Injections
{
Accountable = checkOutInjectionViewModel.Accountable,
Date = checkOutInjectionViewModel.Date,
Injection = checkOutInjectionViewModel.Injection,
Location = checkOutInjectionViewModel.Location,
MySignature = checkOutInjectionViewModel.MySignature,
Provider = checkOutInjectionViewModel.Provider,
Quantity = checkOutInjectionViewModel.Quantity,
};
db.InjectionsAggregate.Add(injection);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(checkOutInjectionViewModel);
}
堆栈跟踪
[InvalidOperationException: There is already an open DataReader associated with this Command which must be closed first.]
System.Data.SqlClient.SqlInternalConnectionTds.ValidateConnectionForExecute(SqlCommand command) +2076159
System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async) +328
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry) +161
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +121
System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +202
System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch(TTarget target, Func`3 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed) +104
System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader(DbCommand command, DbCommandInterceptionContext interceptionContext) +505
System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) +37
[EntityCommandExecutionException: An error occurred while executing the command definition. See the inner exception for details.]
System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) +126
System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute(ObjectContext context, ObjectParameterCollection parameterValues) +1047
System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction(Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) +469
System.Data.Entity.Core.Objects.<>c__DisplayClass7.<GetResults>b__5() +205
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func`1 operation) +238
System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) +349
System.Data.Entity.Core.Objects.DataClasses.EntityReference`1.Load(MergeOption mergeOption) +188
System.Data.Entity.Core.Objects.DataClasses.RelatedEnd.DeferredLoad() +449
System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.LoadProperty(TItem propertyValue, String relationshipName, String targetRoleName, Boolean mustBeNull, Object wrapperObject) +131
System.Data.Entity.Core.Objects.Internal.<>c__DisplayClass7`2.<GetInterceptorDelegate>b__2(TProxy proxy, TItem item) +151
System.Data.Entity.DynamicProxies.Inventory_AAF69D7ACE3EC0D7440AC81F5B4FEF9AA1625FB9547A97AF87B7EEE3DB9F6C07.get_Location_Injection() +39
Hughston_Injections.Controllers.CheckOutInjectionViewModelsController.Create(CheckOutInjectionViewModel checkOutInjectionViewModel) +123
lambda_method(Closure , ControllerBase , Object[] ) +139
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +209
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +35
System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +39
System.Web.Mvc.Async.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult) +67
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +42
System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +72
System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +386
System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +386
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +42
System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +30
System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +186
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38
System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +29
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +65
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +53
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +36
System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38
System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +44
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +65
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +399
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +157
这是我想出的解决方案，仅当 运行 从我发布到的服务器上时，我才继续收到打开的 DataReader 错误，在本地一切正常 运行。
将所有内容转换为 sql 命令后，我要做的最后一件事是移动引用数据库上下文（在控制器中声明）的 foreach 循环，并且必须在我将更改保存到新的上下文实例，例如在尝试之前仍然会导致失败。
[HttpPost]
[ValidateAntiForgeryToken]
[ActionFilters.AuditInventory]
public ActionResult Create([Bind(Include = "CheckoutID,Date,Provider,Injection,Patient,Chart,Location,Lot,Restocked,Authorized,Accountable,Quantity")] CheckOutInjectionViewModel checkOutInjectionViewModel)
{
if (ModelState.IsValid)
{
StringBuilder sb = null;
using (SqlConnection conn = new SqlConnection("CONNECTION_STRING"))
{
try
{
sb = new StringBuilder("INSERT INTO Injections VALUES (");
sb.Append("'" + (checkOutInjectionViewModel.Date.HasValue ? checkOutInjectionViewModel.Date.Value.ToString("yyyy-MM-dd") : "1999-01-01") + "',");
sb.Append("'" + checkOutInjectionViewModel.Provider + "', ");
sb.Append("'" + checkOutInjectionViewModel.Quantity.ToString() + "', ");
sb.Append("'" + checkOutInjectionViewModel.Accountable + "', ");
sb.Append("'" + checkOutInjectionViewModel.Location + "', ");
sb.Append("NULL,");
sb.Append("'" + checkOutInjectionViewModel.Injection + "');");
sb.Append("INSERT INTO CheckOutInjectionViewModels VALUES (");
sb.Append("'" + (checkOutInjectionViewModel.Date.HasValue ? checkOutInjectionViewModel.Date.Value.ToString("yyyy-MM-dd") : "1999-01-01") + "',");
sb.Append("'" + checkOutInjectionViewModel.Patient + "', ");
sb.Append("'" + checkOutInjectionViewModel.Chart + "', ");
sb.Append("'" + checkOutInjectionViewModel.Lot + "', ");
sb.Append("'FALSE',");
sb.Append("NULL,");
sb.Append("'FALSE',");
sb.Append("'" + checkOutInjectionViewModel.Provider + "', ");
sb.Append("'" + checkOutInjectionViewModel.Injection + "', ");
sb.Append("'" + checkOutInjectionViewModel.Location + "', ");
sb.Append("'" + checkOutInjectionViewModel.Accountable + "', ");
sb.Append("'" + checkOutInjectionViewModel.Quantity.ToString() + "', ");
sb.Append("NULL);");
conn.Open();
var context = new ApplicationDbContext();
context.Database.ExecuteSqlCommand(sb.ToString());
context.SaveChanges();
foreach (var i in db.Inventories)
{
if (i.Location_Injection.Bottle == null)
{
if (i.Location_Injection.Location.Location == checkOutInjectionViewModel.Location && i.Location_Injection.Injection.Injection == checkOutInjectionViewModel.Injection)
{
i.Quantity -= checkOutInjectionViewModel.Quantity;
}
}
}
}
catch (Exception ex)
{
ViewBag.Error = ex.Message + Environment.NewLine + sb.ToString();
ViewBag.Locations = new SelectList(db.Locations, "Location", "Location");
ViewBag.Providers = new SelectList(db.Providers, "Provider", "Provider");
ViewBag.Injections = new SelectList(db.Injections, "Injection", "Injection");
ViewBag.Accountables = new SelectList(db.Accountables, "Accountable", "Accountable");
}
finally
{
conn.Close();
}
return RedirectToAction("Index");
}
}
return View(checkOutInjectionViewModel);
}