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Editorial Team
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Asked: 2026-06-13T04:08:48+00:00

I added database file to my built in sql server of Visual Studio and

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I added database file to my built in sql server of Visual Studio and i have also connection string of it but i am confuse how to add this connection string into web.config
here is my try to add connection string to code below :

<connectionStrings>
   <add name="myFirstConnectionString" connectionString="Data Source= .\SQLEXPRESS;AttachDbFilename="C:\Users\Ahdus\Desktop\First Task\First Task\MyFirstTask.mdf"; Integrated Security=True;Connect Timeout=30;User Instance=TrueproviderName="System.Data.SqlClient" />
  </connectionStrings>

I am much confused that how i can add connection string of my visual studio built in database file to web.config.
Please help me as i am new in asp.net and ignore my way of asking.

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1 Answer

  1. Editorial Team

    To make your connection string work with the path you’ve given, it should look somewhat like this:

    Visual Studio 2012 (SQL Server 2012):

    <connectionStrings>
  <add name="myFirstConnectionString" 
       connectionString="Data Source=(LocalDB)\v11.0;Integrated Security=True;AttachDBFilename=&quot;C:\Users\Ahdus\Desktop\First Task\First Task\MyFirstTask.mdf&quot;;Integrated Security=True" 
       providerName="System.Data.SqlClient"/>
</connectionStrings>

    Visual Studio 2010 (SQL Server 2010):

    <connectionStrings>
  <add name="myFirstConnectionString"
       connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=&quot;C:\Users\Ahdus\Desktop\First Task\First Task\MyFirstTask.mdf&quot;;User Instance=true"
       providerName="System.Data.SqlClient" />
</connectionStrings>

    But you should consider moving the database file to the App_Data folder in your project, and then use AttachDBFilename=|DataDirectory|MyFirstTask.mdf instead.

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