Question

I created my own CMS for my own use.
currently, I already launch 3 websites using my CMS. and will keep adding.

since all the websites always use the same version of my CMS, I just need to create one administration site to rule them all.

I use Subsonic 2.x for data access layer.
in administration website, I have to put all connectionStrings

<SubSonicService defaultProvider="firstSql">
    <providers>
        <clear/>
        <add name="firstSql" type="SubSonic.SqlDataProvider, SubSonic" connectionStringName="first" generatedNamespace="firstSql"/>
        <add name="secondSql" type="SubSonic.SqlDataProvider, SubSonic" connectionStringName="second" generatedNamespace="second"/>
        <add name="thirdSql" type="SubSonic.SqlDataProvider, SubSonic" connectionStringName="third" generatedNamespace="thirdSql"/>
    </providers>
</SubSonicService>

<connectionStrings>
    <clear/>
    <add name="first" connectionString="Data Source=123.123.12.3;Initial Catalog=first;User ID=first;Password=first" providerName="System.Data.SqlClient"/>
    <add name="second" connectionString="Data Source=123.123.12.3;Initial Catalog=second;User ID=second;Password=second" providerName="System.Data.SqlClient"/>
    <add name="third" connectionString="Data Source=123.123.12.3;Initial Catalog=third;User ID=third;Password=third" providerName="System.Data.SqlClient"/>
</connectionStrings>

here is the ugly code

switch(sitename){
    case "first":
        var comment1 = new firstSql.Comment(id);
        comment1.Accepted = true;
        comment1.Save();
        break;
    case "second":
        var comment2 = new secondSql.Comment(id);
        comment2.Accepted = true;
        comment2.Save();
        break;
    case "third":
        var comment3 = new thirdSql.Comment(id);
        comment3.Accepted = true;
        comment3.Save();
        break;
}

I’m looking for a way to make it like this

/* some magic to dynamically change the connection string */
cmsSql.ConnectionString( getConnectionString(sitename) ); 

var comment = new cmsSql.Comment(id);
comment.Accepted = true;
comment.Save();

Is there any ORM solution that support this?

Or,

do you know any workaround to do it with current ORM (Subsonic 2.x) ?

UPDATE: I add one more example

cmsSql.ConnectionString( DB_ConString_WebsiteABC ); 

var comment = new cmsSql.Comment(id);
comment.Accepted = true;
comment.Save();

/* some magic to dynamically change the connection string */
cmsSql.ConnectionString( DB_ConString_AnotherWebsiteThatSimilarToABC ); 

var comment = new cmsSql.Comment(id);
comment.Accepted = true;
comment.Save(); // saved to another database

Answer 1

If you only need to manage the CMS for one site at once, I would use a single SubSonic provider, and change the static DefaultConnectionString property, as per this example:

http://www.stevetrefethen.com/blog/SettingSubsonicsconnectionstringatruntime.aspx