你如何改變SubSonic 3的連接字符串？

Question

我想在SharedDbConnectionScope中包裝一些查詢，並在不同的連接字符串下執行它們。如何動態添加提供程序/連接字符串以執行此操作？

感謝

Answer 1

無論是ActiveRecord\Context.tt和LinqTemplates\Context.tt，你會用它來生成你的類包含構造：

public <#=DatabaseName#>DB(string connectionStringName) 
    { 
     DataProvider = ProviderFactory.GetProvider(connectionStringName); 
     Init(); 
    } 

    public <#=DatabaseName#>DB(string connectionString, string providerName) 
    { 
     DataProvider = ProviderFactory.GetProvider(connectionString,providerName); 
     Init(); 
    } 

所以，你可以在你的連接字符串傳遞給這些構造之一，如：

// point to a certain connection string in the app.config 
var db = new MySample("SomeConnectionStringName"); 

// Use a specific connection string, not the app.config 
var db = new MySampleDB(@"server=.\SQL2008;database=Sample;integrated security=true;", "System.Data.SqlClient");