NHibernate 的相对路径连接字符串

Question

我正在使用以下代码通过 NHibernate 创建Session Factory。我想用相对路径来指定这个路径，这样当我和我的队友合并我们的分支时，我们就不必继续修复连接字符串。我怎样才能做到这一点？

private static void InitializeSessionFactory(bool deleteSchemaOnClosing = false, bool regenerateSchemaOnOpening = false)
{
_sessionFactory = Fluently.Configure()
    .Database(MsSqlConfiguration.MsSql2008
                  .ConnectionString(
                      @"Data Source=.\SQLEXPRESS;AttachDbFilename=""C:\MyProject\MyProjectCore\Fluent NHibernate\CoreDatabase.mdf"";Integrated Security=True;User Instance=True")
                  .ShowSql()
    )
    .Mappings(m =>
              m.FluentMappings
                  .AddFromAssemblyOf<User>())
    .ExposeConfiguration(cfg => new SchemaExport(cfg)
                                    .Create(deleteSchemaOnClosing,regenerateSchemaOnOpening))
    .BuildSessionFactory();
}

我的app.config 文件如下所示：

<?xml version="1.0"?>
<configuration>
    <configSections>
    </configSections>
    <connectionStrings>
        <add name="CoreDatabase.Properties.Settings.CoreDatabaseConnectionString"
            connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\CoreDatabase.mdf;Integrated Security=True;User Instance=True"
            providerName="System.Data.SqlClient" />
        <add name="Fluent_NHibernate.Properties.Settings.CoreDatabaseConnectionString"
            connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\CoreDatabase.mdf;Integrated Security=True;User Instance=True"
            providerName="System.Data.SqlClient" />
    </connectionStrings>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0,Profile=Client"/></startup></configuration>

谢谢！

Answer 1

看看 SqlConnectionStringBuilder，你可以这样做：

var rawStr = Settings.CoreDatabaseConnectionString.ConnectionString;
// retrieve the original connection string from config file

var conBuilder = new SqlConnectionStringBuilder(rawStr);
conBuilder.AttachDBFilename = Path.GetFullPath(
    Path.Combine(Environment.CurrentDirectory, "CoreDatabase.mdf"));
// if you're doing this in a web environment, swap Environment.CurrentDirectory 
// for HttpRuntime.AppDomainAppPath

_sessionFactory = Fluently.Configure()
    .Database(MsSqlConfiguration.MsSql2008
                  .ConnectionString(conBuilder.ToString())
                  .ShowSql()
    )
// rest of your configuration...

Answer 2

作为一个例子，你可以遵循这样的.. 这将是一种将值保存到 .Config 文件的方法，但只是为了给您提供一个示例，说明如何在 .Config 文件中使用参数，看看这个。

如果您确实需要示例，我还将以更简单的方式附加到我的答案中

//Add config like this:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <connectionStrings>

  </connectionStrings>
</configuration>


 Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
            config.ConnectionStrings.ConnectionStrings.Add(new ConnectionStringSettings(
                                                          "MyConnectionString",
                                                          String.Format("DataSource={0};InitialCatalog={1};IntegratedSecurity={2}",
                                                                         "testing", "testing2", "Testing6")));
            config.Save(ConfigurationSaveMode.Modified, true);
            ConfigurationManager.RefreshSection("connectionStrings");
            MessageBox.Show(ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString)

看看如何从配置文件中读取并尝试链接上的示例代码并逐步执行代码，这将是一次很棒的学习体验... How to read Application Settings from .Config file