entity framework EntityConnectionStringBuilder in asp.net c#

Entity Framework Connection String

Pass connection string run time in entity framework

public string GetConnectionString()
{
       string connectionstring = "DATA SOURCE=lesson8;PASSWORD=lesson8;PERSIST SECURITY INFO=True;USER ID=lesson8";
       EntityConnectionStringBuilder newconnstring = new EntityConnectionStringBuilder();
       newconnstring.Metadata = @"res://*/lesson8Reports.csdl|res://*/lesson8Reports.ssdl|res://*/lesson8Reports.msl";//@"res://*/";
       newconnstring.Provider = "System.Data.SqlClient"; //  Oracle.DataAccess.Client
       newconnstring.ProviderConnectionString = connectionstring;

       return newconnstring.ToString();
}

use

myEntity _ent = new myEntity(GetConnectionString());

if your data provider in sql than add in provider
System.Data.SqlClient

or provider in oracle than add to
Oracle.DataAccess.Client