一、引子

你是否也遇到過這樣的問題：項目很多配置都寫到了App.Config或Web.Config的AppSettings內，每個人都加了幾條，到最后囤積了大量的配置，分不清哪個是有用的、哪個是沒用的了。（即便加了相關注釋，也是亂的可以）

?1???<appSettings>
?2?????<!--是否拋出異常-->
?3?????<add?key="HasException"?value="true"?/>
?4?????<add?key="Mess**********_Enable"?value="true"?/>
?5?????<add?key="Mess**********_CorpCode"?value=""?/>
?6?????<add?key="Mess**********_Url"?value=""?/>
?7?????<add?key="Mess**********_Account"?value=""?/>
?8?????<add?key="Mess**********_AuthKey"?value=""?/>
?9?????<add?key="Mess**********_CGID"?value=""?/>
10?????<add?key="Mess**********_MaxNumberPerHour"?value=""?/>
11?????<add?key="Mess**********_Signature"?value=""?/>
12?????<add?key="Mess**********__Enable"?value="true"?/>
13?????<add?key="JPush**********Key"?value="**********"?/>
14?????<add?key="JPush**********Secret"?value="**********"?/>
15?????<add?key="Aud**********Hosts"?value="127.0.0.1:1000"?/>
16?????<!--true開啟?false?關閉-->
17?????<add?key="Mess**********_Enable"?value="true"?/>
18?????<!--key-->
19?????<add?key="Baidu**********Key"?value="**********"?/>
20?????<add?key="Baidu**********Secret"?value="**********"?/>
21?????<!--微信開發者?AppId,Secret和Token-->
22?????<add?key="AppId"?value="**********"?/>
23?????<add?key="Secret"?value="**********"?/>
24?????<add?key="Token"?value="**********"?/>
25?????<!--證書文件路徑（退款用）-->
26?????<add?key="CertPath"?value="E:\cert\apiclient_cert.pem"?/>
27?????<!--App證書文件路徑（退款用）-->
28?????<add?key="AppCertPath"?value="E:\cert\**********.pfx"?/>
29???</appSettings>

那么問題來了，怎么解決呢？ ?

二、方案

?將同類、同項目、同模塊的配置放到自定義配置節下，統一管理、讀取，（可能并不是很好的解決方案，不喜勿噴）。如：

?1?<configuration>
?2???<configSections>
?3?????<!--自定義Section聲明-->
?4?????<!--name:自定義節點名稱-->
?5?????<!--type:讀取配置信息類的命名空間,所在程序集-->
?6?????<section?name="AssemblyInfo"?type="Hetring.ConfigReader.SectionReader,Hetring.ConfigReader"?requirePermission="false"></section>
?7???</configSections>
?8?
?9???<!--名稱同聲明的name-->
10???<AssemblyInfo>
11?????<add?key="Name"?value="Hetring.ConfigReader"?/>
12?????<add?key="Version"?value="1.0"?/>
13?????<add?key="Description"?value="This?is?description."?/>
14???</AssemblyInfo>
15?</configuration> 三、代碼

自定義配置節處理程序，需繼承System.Configuration.IConfigurationSectionHandler接口，并實現object Create(object parent, object configContext, XmlNode section)方法：

?1?????public?class?SectionReader?:?IConfigurationSectionHandler
?2?????{
?3?????????public?object?Create(object?parent,?object?configContext,?System.Xml.XmlNode?section)
?4?????????{
?5?????????????lock?(typeof(SectionReader))
?6?????????????{
?7?????????????????Hashtable?sectionSetting?=?new?Hashtable();//存放配置信息，也可用Dictionary<string,string>
?8?
?9?????????????????foreach?(XmlNode?node?in?section.ChildNodes)
10?????????????????{
11?????????????????????if?(node.NodeType?==?XmlNodeType.Element?&&?node.Name?==?"add")
12?????????????????????{
13?????????????????????????var?key?=?node.Attributes["key"].Value;
14?????????????????????????var?value?=?node.Attributes["value"].Value;
15?????????????????????????sectionSetting.Add(key,?value);//放入hashtable中
16?????????????????????}
17?????????????????}
18?
19?????????????????return?sectionSetting;
20?????????????}
21?????????} 22?????}?

?讀取配置節時，需要用到System.Configuration.ConfigurationManager.GetSection(SectionName)方法，獲取到的是object類型對象，而我們定義的處理程序返回的是Hashtable，直接轉換即可：

?1?????public?class?AssemblyInfoConfig
?2?????{
?3?????????///?<summary>
?4?????????///?Section名稱
?5?????????///?</summary>
?6?????????private?static?string?SectionName?=?"AssemblyInfo";
?7?
?8?????????private?static?Hashtable?_settings?{?get;?set;?}
?9?
10?????????protected?static?Hashtable?SectionSettings
11?????????{
12?????????????get
13?????????????{
14?????????????????//當無配置時，ConfigurationManager.GetSection()會返回null，這里強制創建一個hashtable，防止空引用
15?????????????????if?(_settings?==?null)
16?????????????????????_settings?=?(ConfigurationManager.GetSection(SectionName)?as?Hashtable)????new?Hashtable();
17?
18?????????????????return?_settings;
19?????????????}
20?????????}
21?
22?????????public?static?string?Name
23?????????{
24?????????????get
25?????????????{
26?????????????????return?ObjectToString(SectionSettings["Name"]);
27?????????????}
28?????????}
29?
30?????????public?static?string?Version
31?????????{
32?????????????get
33?????????????{
34?????????????????return?ObjectToString(SectionSettings["Version"]);
35?????????????}
36?????????}
37?
38?????????public?static?string?Description
39?????????{
40?????????????get
41?????????????{
42?????????????????return?ObjectToString(SectionSettings["Description"]);
43?????????????}
44?????????}
45?
46?????????#region?私有方法
47?
48?????????///?<summary>
49?????????///?將Object轉換為非null字符串
50?????????///?</summary>
51?????????///?<param?name="value">待轉換Object</param>
52?????????///?<returns>不為空的字符串（value為null，返回空字符串）</returns>
53?????????private?static?string?ObjectToString(object?value)
54?????????{
55?????????????if?(value?==?null)
56?????????????????return?string.Empty;
57?
58?????????????return?value.ToString();
59?????????}
60?
61?????????#endregion
62?????} 四、調用

?寫了個控制臺測試下：

?1?????class?Program
?2?????{
?3?????????static?void?Main(string[]?args)
?4?????????{
?5?????????????Console.WriteLine("Name:"?+?AssemblyInfoConfig.Name);
?6?????????????Console.WriteLine("Version:"?+?AssemblyInfoConfig.Version);
?7?????????????Console.WriteLine("Description:"?+?AssemblyInfoConfig.Description);
?8?
?9?????????????Console.ReadKey();
10?????????}
11?????}

?輸出結果：

Name:Hetring.ConfigReaderVersion:1.0Description:This is description.

?

轉載于:https://www.cnblogs.com/hetring/p/4182579.html

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