c# - Connect to a MSSQL DB using Web.config -


i have created asp.net c# mvc project. trying connect mssql db. in web.config file added following;

  <connectionstrings>      <add name="sdbconnection" providername="system.data.sqlclient"          connectionstring="data source=(localdb)\v11.0;attachdbfilename="c:\users\o\documents\visual studio 2012\projects\ppl\ppl\app_data\ppldb.mdf";integrated security=true" />   </connectionstrings>

but, above code incorrect ; want follows; 

  <connectionstrings>     <add name="sdbconnection" providername="system.data.sqlclient"          connectionstring="data source=(localdb)\v11.0;attachdbfilename=|datadirectory|ppldb.mdf;integrated security=true" />   </connectionstrings>

but datadirectory ? specify ?

what name="sdbconnection" ? can give name want ?

first question quoting msdn:

the |datadirectory| portion of connection string specifies mdf file located inthe app_data directory

moreover can change using following function:

appdomain.currentdomain.setdata("datadirectory", "d:\database");

second question name="sdbconnection" allows use specified conection string. in code can write:

string connectionstring = configurationmanager.connectionstrings["sdbconnection"].connectionstring;

to acces connection string


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