Asp.net mvc updating repository class.

  I want call connection string dynamically without mofifying connection string in web config.As i am creating project for SAAS.So i can handle multiple users request with multiple databases.

 

I have tried to update it by passing variable but it showing error.So please let me know the righ t way.Thanks in advance.

 

 

 

My code:

string name="";
db_hrEntities context = new db_hrEntities(name); Now this name variable i cant paas.