c# - Select entity connection string at runtime -


i have application connects mysql database. use entity framework job. when first installed, set entity, , resulted in connection string this: 

<connectionstrings> <add name="networkingentities" connectionstring="metadata=res://*/model1.csdl|res://*/model1.ssdl|res://*/model1.msl;provider=mysql.data.mysqlclient;provider connection string="server=localhost;user id=root;password=lucian;persist security info=true;database=networking"" providername="system.data.entityclient"/> </connectionstrings>

now, application has 2 users: admin , student.

form1 => updates information database , server

login form=> users authentificate

mainform => action takes part. if admin logged in can modify contents in database

the database: has 2 users: root , lucian.

"lucian" limited user...

now, problem is:

how can add second connection string existing one, , select 1 @ runtime? mean, when form1 running, put thread sleep, select second connections string , then, go login form, login admin , make cnahge sin database?

and how can tho login information connection string, external file?

so how have solved:
1. modified app.config like:

 <connectionstrings configsource="databaseconnectiondetails.config" />;

and databaseconnectiondetails.config:

<connectionstrings>     <add name="networkingentities" connectionstring="metadata=res://*/model1.csdl|res://*/model1.ssdl|res://*/model1.msl;provider=mysql.data.mysqlclient;provider connection string=&quot;server=localhost;user id=lucian;password=lucian;persist security info=true;database=networking&quot;" providername="system.data.entityclient" />     <add name="networkingentitiesadmin" connectionstring="metadata=res://*/model1.csdl|res://*/model1.ssdl|res://*/model1.msl;provider=mysql.data.mysqlclient;provider connection string=&quot;server=localhost;user id=root;password=lucian;persist security info=true;database=networking&quot;" providername="system.data.entityclient" />   </connectionstrings>

*2.*added contructor string parameter model1.context.tt template:

 public <#=code.escape(container)#>(string mystring)         : base(mystring)     { <# if (!loader.islazyloadingenabled(container)) { #>         this.configuration.lazyloadingenabled = false; <# } #>     }

*3.*get connection string this:

string  str = configurationmanager.connectionstrings["networkingentitiesadmin"].connectionstring;

*4.*and whenever want use context , use(for example):

networkingentities net=new networkingentities(str);   public list<utilizator> listautilizatori()         {              var query = u in net.utilizator                         select u;             list<utilizator> users = new list<utilizator>();             try             {                 users = query.tolist();             }             catch (exception e)             {                 console.writeline(e.message);             }             return users;         }

now, still have discover how encrypt config files.... thank help...


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