open connection string with data.mdf in appdata folder

this is my connection string
<connectionStrings>
    <add name="EnergyConnectionString3" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Documents and Settings\hhhhhhh\Desktop\energy\App_Data\databasename.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient"/>
  </connectionStrings>

and it works fine but how do i shorten the path can i say just app_data/databasename.mdf instead of that whole string so that when i bring it to other computer it works just fine? thanks.
StewSupportAsked:
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Carl TawnSystems and Integration DeveloperCommented:
You should be able to use:

   
<connectionStrings>
    <add name="EnergyConnectionString3" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\databasename.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient"/>
</connectionStrings>

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StewSupportAuthor Commented:
thanks a million
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