Previously I'm using visual studio express 2013, and now i moved to visual studio 2012 ultimate,
so when i open the websites that i build by visual studio express 2013 i got this:
The Data Source value in the connection sting specifies an instance of SQL Server that is not installed. To resolve this issue, you can either choose to install the matching instance of SQL Server or modify the Data Source value in the connection string.
this is my connection string for visual studio express 2013:
<add name="ConnectionString" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient"/>
this connection string for visual studio 2012 ultimate:
<add name="ConnectionString" connectionString="Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True"
so what i shall do to make the websites that i created by visual studio express 2013 run by visual studio 2012 ultimate
with out install SQL sever express 2013.