Question

我正在使用this Microsoft.EnterpriseLibrary端口用于.Net Core。它需要一个配置文件app.config，并在其中指定了连接字符串。我尝试使用与另一个工作项目中使用的连接字符串相同的字符串，但在这里不起作用。

如何为ASP.NET Core 2.1指定DB2连接字符串？

我这是我尝试过的：

<connectionStrings>
    <add name="Development" connectionString="server=MY.SERVER.COM:446;database=DBXX;user id=USERXX;password=PASSWORDXX;" providerName="IBM.Data.DB2.Core"/>
</connectionStrings>

但是当我执行此操作时：

DatabaseFactory.SetDatabaseProviderFactory(
    new DatabaseProviderFactory(
        new SystemConfigurationSource(false).GetSection
    ), 
    false
);

var db = DatabaseFactory.CreateDatabase("Development");

它抛出了这个异常：

Exception has occurred: CLR/System.InvalidOperationException
An exception of type 'System.InvalidOperationException' occurred in Microsoft.Practices.EnterpriseLibrary.Data.dll but was not handled in user code: 'The connection string for the database 'Development' does not exist or does not have a valid provider.'
 Inner exceptions found, see $exception in variables window for more details.
 Innermost exception     System.Configuration.ConfigurationErrorsException : The requested database Development does not have a valid ADO.NET provider name set in the connection string.

我认为提供商名称不正确，但是我在网络上找不到任何有效的示例。

Answer 1

好，我解决了。原来，我找不到IBM.Data.DB2.Core的任何提供程序，因此我像这样配置了app.config文件：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

    <configSections>
        <section name="system.data" type="System.Data.Common.DbProviderFactoriesConfigurationHandler, Microsoft.Practices.EnterpriseLibrary.Data, Version=6.0.0.0, Culture=neutral, PublicKeyToken=null" requirePermission="true" />
        <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=6.0.0.0, Culture=neutral, PublicKeyToken=null" requirePermission="true" />
    </configSections>

    <dataConfiguration defaultDatabase="Development" />

    <connectionStrings>
        <add name="Development" connectionString="server=MY.SERVER.COM:446;database=DBXX;user id=USERXX;password=PASSWORDXX;" providerName="IBM.Data.DB2.Core"/>
    </connectionStrings>

    <system.data>
        <DbProviderFactories>
            <remove invariant="IBM.Data.DB2.Core" />
            <add name="DB2 Data Provider" invariant="IBM.Data.DB2.Core" description=".Net Framework Data Provider for DB2" type="IBM.Data.DB2.Core.DB2Factory, IBM.Data.DB2.Core" />
        </DbProviderFactories>
    </system.data>

</configuration>

在研究IBM程序集时，我发现有一个名为DbProviderFactory的{{1}}实现类。如果DB2Factory文件配置有app.config部分（如上所示），则可以使用该类代替提供者名称。

IBM DB2 Core：ASP.NET Core 2.1和Microsoft Enterprise Libraries的连接字符串

1 个答案: