C# 已添加具有相同密钥的项-仅处于释放模式
专家们 在运行时第一次使用实体框架函数时,我就得到了这个系统.ArgumentException(已经添加了一个具有相同键的项)。 奇怪的是:如果我使用调试模式,它可以正常工作。在编译相同的代码而不在发布模式中进行任何更改后,它立即崩溃,本文顶部提到了一个例外 有人对这种奇怪的行为了解得更多吗?我怎样才能修好它?我无法向我的客户推出调试版本:( 此时将引发异常:C# 已添加具有相同密钥的项-仅处于释放模式,c#,.net,entity-framework,release,C#,.net,Entity Framework,Release,专家们 在运行时第一次使用实体框架函数时,我就得到了这个系统.ArgumentException(已经添加了一个具有相同键的项)。 奇怪的是:如果我使用调试模式,它可以正常工作。在编译相同的代码而不在发布模式中进行任何更改后,它立即崩溃,本文顶部提到了一个例外 有人对这种奇怪的行为了解得更多吗?我怎样才能修好它?我无法向我的客户推出调试版本:( 此时将引发异常: try { var blub = context.ExecuteStoreQuery<int>(QueryString
try
{
var blub = context.ExecuteStoreQuery<int>(QueryString);
}
catch (Exception ex)
{
// ...
}
首先,确保即使生成了干净的发布版本,也会出现错误(我的意思是在运行版本之前没有二进制文件,只有源代码)。如果没有,请修复项目设置(例如,隔离调试和发布版本目标文件夹) 如果错误只发生一次,并且在应用程序正常运行之后,您一定会遇到一些同步问题。虽然这很奇怪,因为元数据加载似乎是同步的。但在任何情况下,EF对象都不是线程安全的。不要在跨线程场景中使用它们 如果上面所说的没有帮助,那么我的研究结果可能会对您有所帮助。以下是与错误相关的EF源代码摘录:
//----------------------------------------------------------------------
// <copyright file="ObjectItemAttributeAssemblyLoader.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner [....]
// @backupOwner [....]
//---------------------------------------------------------------------
using System.Collections.Generic;
using System.Data.Entity;
using System.Data.Objects.DataClasses;
using System.Diagnostics;
using System.Reflection;
namespace System.Data.Metadata.Edm
{
/// <summary>
/// Class for representing a collection of items for the object layer.
/// Most of the implemetation for actual maintainance of the collection is
/// done by ItemCollection
/// </summary>
internal sealed class ObjectItemAttributeAssemblyLoader :
ObjectItemAssemblyLoader
{
// ...
/// <summary>
/// This method loads all the relationship type that this entity takes part in
/// </summary>
/// <param name="entityType"></param>
/// <param name="context"></param>
private void LoadRelationshipTypes()
{
foreach (EdmRelationshipAttribute roleAttribute in
SourceAssembly.GetCustomAttributes(typeof(EdmRelationshipAttribute), false /*inherit*/))
{
// Check if there is an entry already with this name
if (TryFindNullParametersInRelationshipAttribute(roleAttribute))
{
// don't give more errors for these same bad parameters
continue;
}
bool errorEncountered = false;
// return error if the role names are the same
if (roleAttribute.Role1Name == roleAttribute.Role2Name)
{
SessionData.EdmItemErrors.Add(new EdmItemError(
System.Data.Entity.Strings.SameRoleNameOnRelationshipAttribute(roleAttribute.RelationshipName, roleAttribute.Role2Name),
null));
errorEncountered = true;
}
if (!errorEncountered)
{
AssociationType associationType = new AssociationType(
roleAttribute.RelationshipName, roleAttribute.RelationshipNamespaceName,
roleAttribute.IsForeignKey, DataSpace.OSpace);
SessionData.TypesInLoading.Add(associationType.FullName, associationType);
TrackClosure(roleAttribute.Role1Type);
TrackClosure(roleAttribute.Role2Type);
// prevent lifting of loop vars
string r1Name = roleAttribute.Role1Name;
Type r1Type = roleAttribute.Role1Type;
RelationshipMultiplicity r1Multiplicity = roleAttribute.Role1Multiplicity;
AddTypeResolver(() =>
ResolveAssociationEnd(associationType, r1Name, r1Type, r1Multiplicity));
// prevent lifting of loop vars
string r2Name = roleAttribute.Role2Name;
Type r2Type = roleAttribute.Role2Type;
RelationshipMultiplicity r2Multiplicity = roleAttribute.Role2Multiplicity;
AddTypeResolver(() =>
ResolveAssociationEnd(associationType, r2Name, r2Type, r2Multiplicity));
// get assembly entry and add association type to the list of types in the assembly
Debug.Assert(!CacheEntry.ContainsType(associationType.FullName), "Relationship type must not be present in the list of types");
CacheEntry.TypesInAssembly.Add(associationType);
}
}
}
// ...
}
}
/--------------------------------------------------------------
//
//版权所有(c)微软公司。保留所有权利。
//
//
//@owner[…]
//@backupOwner[…]
//---------------------------------------------------------------------
使用System.Collections.Generic;
使用System.Data.Entity;
使用System.Data.Objects.DataClass;
使用系统诊断;
运用系统反思;
命名空间System.Data.Metadata.Edm
{
///
///类,用于表示对象层的项集合。
///对集合的实际维护的大部分实现是
///由ItemCollection完成
///
内部密封类ObjectItemAttributeAssemblyLoader:
ObjectItemAssemblyLoader
{
// ...
///
///此方法加载此实体参与的所有关系类型
///
///
///
私有void LoadRelationshipTypes()
{
中的foreach(EdmRelationshipAttribute角色属性
SourceAssembly.GetCustomAttributes(typeof(EdmRelationshipAttribute),false/*inherit*/)
{
//检查是否已有具有此名称的条目
if(tryFindNullParametersRelationshipAttribute(角色属性))
{
//不要为这些相同的错误参数提供更多错误
继续;
}
bool errormeeting=false;
//如果角色名称相同,则返回错误
if(roleAttribute.Role1Name==roleAttribute.Role2Name)
{
SessionData.EdmItemErrors.Add(新建EdmItemError(
System.Data.Entity.Strings.SameRoleNameOnRelationshipAttribute(roleAttribute.RelationshipName,roleAttribute.Role2Name),
空);
遇到的错误=真;
}
如果(!遇到错误)
{
AssociationType AssociationType=新AssociationType(
roleAttribute.RelationshipName,roleAttribute.RelationshipNamespaceName,
roleAttribute.IsForeignKey,DataSpace.OSpace);
SessionData.TypesInLoading.Add(associationType.FullName,associationType);
轨道闭合(roleAttribute.Role1Type);
轨道闭合(roleAttribute.Role2Type);
//防止吊起回路变压器
字符串r1Name=roleAttribute.RoleName;
类型r1Type=roleAttribute.Role1Type;
RelationshipMultiplicity r1Multiplicity=roleAttribute.Role1Multiplicity;
AddTypeResolver(()=>
ResolveAssociationEnd(associationType,r1Name,r1Type,r1Multiplicity));
//防止吊起回路变压器
字符串r2Name=roleAttribute.Role2Name;
类型r2Type=roleAttribute.Role2Type;
RelationshipMultiplicity r2 Multiplicity=roleAttribute.Role2Multiplicity;
AddTypeResolver(()=>
ResolveAssociationEnd(associationType,r2Name,r2Type,r2Multiplicity));
//获取程序集条目并将关联类型添加到程序集中的类型列表中
Assert(!CacheEntry.ContainsType(associationType.FullName),“关系类型不能出现在类型列表中”);
CacheEntry.TypesInAssembly.Add(associationType);
}
}
}
// ...
}
}
该方法中使用的唯一字典是SessionData.TypesInLoading
。该键是RelationshipName
和RelationshipNamespaceName
的组合。有趣的是,一条注释说它们检查重复的键,但该方法TryFindNullParametersInRelationshipAttribute
只检查该键属性的属性不是null
s。我想这是一个bug
但更重要的是,所描述的错误一定发生了,因为在程序集中的某个位置,您有多个EdmRelationshipAttribute
,并且RelationshipName
和RelationshipNamespaceName
属性的组合相等。可能有多种原因:
System.Data.Metadata.Edm.ObjectItemAttributeAsemblyLoader.LoadRelationshipTypes()处设置断点
并在反汇编中跟踪它。我认为这几乎是不可能的,因为Dictionary.Insert
方法即将
//----------------------------------------------------------------------
// <copyright file="ObjectItemAttributeAssemblyLoader.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner [....]
// @backupOwner [....]
//---------------------------------------------------------------------
using System.Collections.Generic;
using System.Data.Entity;
using System.Data.Objects.DataClasses;
using System.Diagnostics;
using System.Reflection;
namespace System.Data.Metadata.Edm
{
/// <summary>
/// Class for representing a collection of items for the object layer.
/// Most of the implemetation for actual maintainance of the collection is
/// done by ItemCollection
/// </summary>
internal sealed class ObjectItemAttributeAssemblyLoader :
ObjectItemAssemblyLoader
{
// ...
/// <summary>
/// This method loads all the relationship type that this entity takes part in
/// </summary>
/// <param name="entityType"></param>
/// <param name="context"></param>
private void LoadRelationshipTypes()
{
foreach (EdmRelationshipAttribute roleAttribute in
SourceAssembly.GetCustomAttributes(typeof(EdmRelationshipAttribute), false /*inherit*/))
{
// Check if there is an entry already with this name
if (TryFindNullParametersInRelationshipAttribute(roleAttribute))
{
// don't give more errors for these same bad parameters
continue;
}
bool errorEncountered = false;
// return error if the role names are the same
if (roleAttribute.Role1Name == roleAttribute.Role2Name)
{
SessionData.EdmItemErrors.Add(new EdmItemError(
System.Data.Entity.Strings.SameRoleNameOnRelationshipAttribute(roleAttribute.RelationshipName, roleAttribute.Role2Name),
null));
errorEncountered = true;
}
if (!errorEncountered)
{
AssociationType associationType = new AssociationType(
roleAttribute.RelationshipName, roleAttribute.RelationshipNamespaceName,
roleAttribute.IsForeignKey, DataSpace.OSpace);
SessionData.TypesInLoading.Add(associationType.FullName, associationType);
TrackClosure(roleAttribute.Role1Type);
TrackClosure(roleAttribute.Role2Type);
// prevent lifting of loop vars
string r1Name = roleAttribute.Role1Name;
Type r1Type = roleAttribute.Role1Type;
RelationshipMultiplicity r1Multiplicity = roleAttribute.Role1Multiplicity;
AddTypeResolver(() =>
ResolveAssociationEnd(associationType, r1Name, r1Type, r1Multiplicity));
// prevent lifting of loop vars
string r2Name = roleAttribute.Role2Name;
Type r2Type = roleAttribute.Role2Type;
RelationshipMultiplicity r2Multiplicity = roleAttribute.Role2Multiplicity;
AddTypeResolver(() =>
ResolveAssociationEnd(associationType, r2Name, r2Type, r2Multiplicity));
// get assembly entry and add association type to the list of types in the assembly
Debug.Assert(!CacheEntry.ContainsType(associationType.FullName), "Relationship type must not be present in the list of types");
CacheEntry.TypesInAssembly.Add(associationType);
}
}
}
// ...
}
}