System.InvalidOperationException：无法构造类型数据库

发布于 2024-12-07 09:30:25 字数 2019 浏览 0 评论 0原文

我一直在考虑将一些旧代码重构为基于 net 4.0 的新 WCF 服务，但在本应简单的练习中遇到了一些困难！

场景；

WCF 服务通过 HTTP 托管，实现我们的 ServiceContract，它连接到本地 Sql Server。

当尝试针对服务调用运行简单的 NUnit 测试时，我收到以下错误；

* HelpManager.Tests.GetPage.GetPageById 错误例外： System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail]：尝试获取类型实例时发生激活错误数据库，键“HelpManagement”（故障详细信息等于 An ExceptionDetail，可能由以下人员创建 IncludeExceptionDetailInFaults=true，其值为： Microsoft.Practices.ServiceLocation.ActivationException：激活尝试获取数据库键类型的实例时发生错误「帮助管理」----> Microsoft.Practices.Unity.ResolutionFailedException：解决依赖失败，类型= “Microsoft.Practices.EnterpriseLibrary.Data.Database”，名称= “帮助管理”。 while：解决时发生异常。例外是： InvalidOperationException - 数据库类型不能是建造的。您必须配置容器以提供该值。 - - - - - - - - - - - - - - - - - - - - - - - - 当时的例外，容器是：
正在解决 Microsoft.Practices.EnterpriseLibrary.Data.Database、帮助管理 ----> System.InvalidOperationException：数据库类型不能是建造的。您必须配置容器以提供此值。
在 Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.GuardTypeIsNonPrimiti...)。

我们的（非常标准的）WCF web.config 看起来像；

<configSections>
    <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="true"/>
</configSections>

<dataConfiguration defaultDatabase="HelpManagement"/>

<connectionStrings>
    <add name="HelpManagement" connectionString="server=(local);database=ieq;uid=;pwd=" providerName="System.Data.SqlClient"/>
</connectionStrings>

以及用于调用它的代码示例；

private const string DB_HelpManagement = "HelpManagement";
var db = DatabaseFactory.CreateDatabase(DB_HelpManagement);

谷歌等人的经历并不有趣。我检查了版本等，它们似乎都引用了来自 GAC 的相同 5.0.14，因此不确定问题是什么。

提前致谢

原文

I have been looking into refactoring some old code into a new WCF service, based on net 4.0 and have into a little difficulty with what should be a simple exercise!

The scenario;

WCF Service hosted over HTTP, implementing our ServiceContract, which connects to a local Sql Server.

When attempting to run a simple NUnit test against the Service Call, I get the following error;

* HelpManager.Tests.GetPage.GetPageById Fault
Exception:
System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail]:
Activation error occured while trying to get instance of type
Database, key "HelpManagement" (Fault Detail is equal to An
ExceptionDetail, likely created by
IncludeExceptionDetailInFaults=true, whose value is:
Microsoft.Practices.ServiceLocation.ActivationException: Activation
error occured while trying to get instance of type Database, key
"HelpManagement" ---->
Microsoft.Practices.Unity.ResolutionFailedException: Resolution of the
dependency failed, type =
"Microsoft.Practices.EnterpriseLibrary.Data.Database", name =
"HelpManagement". Exception occurred while: while resolving. Exception
is: InvalidOperationException - The type Database cannot be
constructed. You must configure the container to supply this value.
----------------------------------------------- At the time of the
exception, the container was:
Resolving
Microsoft.Practices.EnterpriseLibrary.Data.Database,HelpManagement
----> System.InvalidOperationException: The type Database cannot be
constructed. You must configure the container to supply this value.
at
Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.GuardTypeIsNonPrimiti...).

Our (pretty standard) WCF web.config for this, looks like;

<configSections>
    <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="true"/>
</configSections>

<dataConfiguration defaultDatabase="HelpManagement"/>

<connectionStrings>
    <add name="HelpManagement" connectionString="server=(local);database=ieq;uid=;pwd=" providerName="System.Data.SqlClient"/>
</connectionStrings>

and an example of the code used to call it;

private const string DB_HelpManagement = "HelpManagement";
var db = DatabaseFactory.CreateDatabase(DB_HelpManagement);

Google et al have been no fun. I have checked versions etc and they all appear to be referencing the same 5.0.14 from GAC, so unsure as to what the problem is.

Thanks in advance

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