[Asp.net 5] Configuration-新一代的配置文件（ConfigurationSource的多種實現），
關於配置文件的目錄：[Asp.net 5] Configuration-新一代的配置文件
在前面我們介紹了，系統中用IConfigurationSource表示不同配置文件的來源，起到讀取、設置、加載配置文件的作用。而虛擬類ConfigurationSource繼承接口IConfigurationSource，其他類又由ConfigurationSource派生（當然我們也可以寫繼承自接口IConfigurationSource類，但是沒什麼必要）。下面是實現不同配置方式的工程：
下面我們主要以測試用例的方式講解Json與XMl配置文件的源碼以及實用方式：
Microsoft.Framework.Configuration.Json
Json的配置文件：在實現的過程中使用Newtonsoft.Json的NuGet程序包，這是非常有名的json操作組件，如果單獨涉及到.net的Json操作，推薦使用該組件。
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public void ArrayOfObjects()
{
var json = @"{
'ip': [
{
'address': '1.2.3.4',
'hidden': false
},
{
'address': '5.6.7.8',
'hidden': true
}
]
}";
var jsonConfigSource = new JsonConfigurationSource(TestStreamHelpers.ArbitraryFilePath);
jsonConfigSource.Load(TestStreamHelpers.StringToStream(json));
Assert.Equal("1.2.3.4", jsonConfigSource.Get("ip:0:address"));
Assert.Equal("False", jsonConfigSource.Get("ip:0:hidden"));
Assert.Equal("5.6.7.8", jsonConfigSource.Get("ip:1:address"));
Assert.Equal("True", jsonConfigSource.Get("ip:1:hidden"));
}
ArrayOfObjects
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public void ExplicitArrayReplacement()
{
var json1 = @"{
'ip': [
'1.2.3.4',
'7.8.9.10',
'11.12.13.14'
]
}";
var json2 = @"{
'ip': {
'1': '15.16.17.18'
}
}";
var jsonConfigSource1 = new JsonConfigurationSource(TestStreamHelpers.ArbitraryFilePath);
jsonConfigSource1.Load(TestStreamHelpers.StringToStream(json1));
var jsonConfigSource2 = new JsonConfigurationSource(TestStreamHelpers.ArbitraryFilePath);
jsonConfigSource2.Load(TestStreamHelpers.StringToStream(json2));
var builder = new ConfigurationBuilder();
builder.Add(jsonConfigSource1, load: false);
builder.Add(jsonConfigSource2, load: false);
var config = builder.Build();
Assert.Equal(3, config.GetConfigurationSections("ip").Count());
Assert.Equal("1.2.3.4", config.Get("ip:0"));
Assert.Equal("15.16.17.18", config.Get("ip:1"));
Assert.Equal("11.12.13.14", config.Get("ip:2"));
}
ExplicitArrayReplacement
- 配置文件的排序後順序（獲取所有子key的時候會對key值進行排序）
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public void PropertiesAreSortedByNumberOnlyFirst()
{
var json = @"{
'setting': {
'hello': 'a',
'bob': 'b',
'42': 'c',
'4':'d',
'10': 'e',
'1text': 'f',
}
}";
var jsonConfigSource = new JsonConfigurationSource(TestStreamHelpers.ArbitraryFilePath);
jsonConfigSource.Load(TestStreamHelpers.StringToStream(json));
var builder = new ConfigurationBuilder();
builder.Add(jsonConfigSource, load: false);
var config = builder.Build();
var configurationSection = config.GetConfigurationSection("setting");
var indexConfigurationSections = configurationSection.GetConfigurationSections().ToArray();
Assert.Equal(6, indexConfigurationSections.Count());
Assert.Equal("4", indexConfigurationSections[0].Key);
Assert.Equal("10", indexConfigurationSections[1].Key);
Assert.Equal("42", indexConfigurationSections[2].Key);
Assert.Equal("1text", indexConfigurationSections[3].Key);
Assert.Equal("bob", indexConfigurationSections[4].Key);
Assert.Equal("hello", indexConfigurationSections[5].Key);
}
PropertiesAreSortedByNumberOnlyFirst
Microsoft.Framework.Configuration.Xml
xml配置文件，在日常中用的也是比較多的，傳統的配置文件就是xml的。[該處實現是支持內容加密的，具體不了解，略]
下面是xml文件的常規用法：
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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
