[Asp.net 5] Configuration-新一代的配置文件（ConfigurationSource的多种实现）

关于配置文件的目录：[Asp.net 5] Configuration-新一代的配置文件

在前面我们介绍了，系统中用IConfigurationSource表示不同配置文件的来源，起到读取、设置、加载配置文件的作用。而虚拟类ConfigurationSource继承接口IConfigurationSource，其他类又由ConfigurationSource派生（当然我们也可以写继承自接口IConfigurationSource类，但是没什么必要）。下面是实现不同配置方式的工程：

public void SupportAndIgnoreXMLDeclaration()
{
var xml =
@"<?xml version='1.0' encoding='UTF-8'?>
<settings>
<Data>
<DefaultConnection>
<ConnectionString>TestConnectionString</ConnectionString>
<Provider>SqlClient</Provider>
</DefaultConnection>
<Inventory>
<ConnectionString>AnotherTestConnectionString</ConnectionString>
<Provider>MySql</Provider>
</Inventory>
</Data>
</settings>";
var xmlConfigSrc = new XmlConfigurationSource(ArbitraryFilePath);

xmlConfigSrc.Load(TestStreamHelpers.StringToStream(xml));

Assert.Equal("TestConnectionString", xmlConfigSrc.Get("Data:DefaultConnection:ConnectionString"));
Assert.Equal("SqlClient", xmlConfigSrc.Get("Data:DefaultConnection:Provider"));
Assert.Equal("AnotherTestConnectionString", xmlConfigSrc.Get("Data:Inventory:ConnectionString"));
Assert.Equal("MySql", xmlConfigSrc.Get("Data:Inventory:Provider"));
}

XMLConfigurationSource