如何获得配置文件中，连接数据库的连接字符串

在ASP .net MVC的应用程序中，需要在web.config中配置连接字符串来连接数据库，在部署到具体的服务器上的时候，就需要查看指定服务器上SQL Server的连接字符串，下图是在windows server 2008中的SQL Server 2008的界面。

下面是web.config文件：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <!--
 3   For more information on how to configure your ASP.NET application, please visit
 4   http://go.microsoft.com/fwlink/?LinkId=152368
 5   -->
 6 <configuration>
 7   <connectionStrings>
 8     <add name="ApplicationServices" connectionString="data source=WIN-WZQI6CNOKTP\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient" />
 9     <add name="SaveenergyConnectionString" connectionString="Data Source=WIN-WZQI6CNOKTP\SQLEXPRESS;Initial Catalog=saveenergy;Persist Security Info=True;User ID=sa;Password=kiss_123*KISS_321" providerName="System.Data.SqlClient" />
10     <add name="SaveenergyEntities" connectionString="metadata=res://*/Models.Enerysaving.csdl|res://*/Models.Enerysaving.ssdl|res://*/Models.Enerysaving.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=WIN-WZQI6CNOKTP\SQLEXPRESS;Initial Catalog=saveenergy;Persist Security Info=True;User ID=sa;Password=kiss_123*KISS_321;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" />
11   </connectionStrings>
12   <system.web>
13     <compilation targetFramework="4.0">
14       <assemblies>
15         <add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
16         <add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
17         <add assembly="System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
18         <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
19       </assemblies>
20     </compilation>
21     <authentication mode="Forms">
22       <forms loginUrl="~/Account/LogOn" timeout="2880" />
23     </authentication>
24     <membership>
25       <providers>
26         <clear />
27         <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="SaveenergyConnectionString" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="2" applicationName="/" />
28       </providers>
29     </membership>
30     <profile>
31       <providers>
32         <clear />
33         <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="SaveenergyConnectionString" applicationName="/" />
34       </providers>
35     </profile>
36     <roleManager enabled="true">
37       <providers>
38         <clear />
39         <add connectionStringName="SaveenergyConnectionString" applicationName="/" name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" />
40       </providers>
41     </roleManager>
42     <pages>
43       <namespaces>
44         <add namespace="System.Web.Mvc" />
45         <add namespace="System.Web.Mvc.Ajax" />
46         <add namespace="System.Web.Mvc.Html" />
47         <add namespace="System.Web.Routing" />
48       </namespaces>
49     </pages>
50   </system.web>
51   <system.webServer>
52     <validation validateIntegratedModeConfiguration="false" />
53     <modules runAllManagedModulesForAllRequests="true" />
54         <directoryBrowse enabled="false" />
55   </system.webServer>
56   <runtime>
57     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
58       <dependentAssembly>
59         <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
60         <bindingRedirect oldVersion="1.0.0.0" newVersion="2.0.0.0" />
61       </dependentAssembly>
62     </assemblyBinding>
63   </runtime>
64 </configuration>