C # Several ways to read a configuration file

Configuration file

<?xml version="1.0"encoding="Utf-8"?><configuration> <configSections> <section name="sqlconfiguration"Type="Configurationdemo.sqlconfiguration,configurationdemo"/> <section name="accountconfiguration"Type="Configurationdemo.accountconfiguration,configurationdemo"/> </configSections> <sqlconfiguration type="MSSQL"connectionstring="server=.; Integrated Security=sspi;database=northwind"></SQLConfiguration> <AccountConfiguration> <users username="Liunian"password="123456"></users> </AccountConfiguration>
<system.net>
<mailSettings>
&LT;SMTP from= "[email protected]" >
<network/>
</smtp>
</mailSettings>
</system.net></configuration>

First Kind

    classsqlconfiguration:configurationsection {[ConfigurationProperty ("type", isrequired =true)]         Public stringType {Get{return  This["type"]. ToString (); }            Set{ This["type"] =value;} } [ConfigurationProperty ("connectionString", isrequired =true)]         Public stringConnectionString {Get{return  This["connectionString"]. ToString (); }            Set{ This["connectionString"] =value;} }    }

            Sqlconfiguration sqlconfig = (sqlconfiguration) configurationmanager.getsection ("sqlconfiguration ");            Console.WriteLine (sqlconfig.type);            Console.WriteLine (sqlconfig.connectionstring);

The second Kind

     Public classaccountconfiguration:configurationsection {[ConfigurationProperty ("Users", isrequired =true)]         Publicaccountsectionelement Users {Get{return(accountsectionelement) This["Users"]; }        }    }     Public classaccountsectionelement:configurationelement {[ConfigurationProperty ("username", isrequired =true)]         Public stringUserName {Get{return  This["username"]. ToString (); }            Set{ This["username"] =value;} } [ConfigurationProperty ("Password", isrequired =true)]         Public stringPassword {Get{return  This["Password"]. ToString (); }            Set{ This["Password"] =value;} }    }

          Accountconfiguration accountconfig = (accountconfiguration) configurationmanager.getsection ("  Accountconfiguration");            Console.WriteLine (accountConfig.Users.UserName);            Console.WriteLine (AccountConfig.Users.Password);

Third Kind

            Configuration config = configurationmanager.openexeconfiguration (configurationuserlevel.none);             = Config. GetSection ("system.net/mailsettings/smtp" as smtpsection;            Console.WriteLine (section. from);

Fourth type

Http://www.cnblogs.com/liunlls/p/config.html

Fifth type

Configurationmanager.appsettings

Sixth type

Configurationmanager.connectionstrings

Of course there are many ...

C # Several ways to read a configuration file