Question

I used to work only with asp.net websites before. I know that in ASP.NET website, the connection string is found in the web.config file.

My problem is now I have started working with VB.NET applications which needed to be interfaced to a database. How is a connection string created and where should I put it?

Thanks!

Here’s the whole app.config file:

<?xml version="1.0" encoding="utf-8" ?>
<configuration> 
  <connectionStrings>
    <add name="dbAsthmaConnectionString" connectionString="Data Source=9300-00\SQLEXPRESS;Initial Catalog=dbStore;Persist Security Info=True;User ID=johnsmith;Password=1234" providerName="System.Data.SqlClient"/>
  </connectionStrings>

  <system.diagnostics>
    <sources>
      <!-- This section defines the logging configuration for My.Application.Log -->
      <source name="DefaultSource" switchName="DefaultSwitch">
         <listeners>
           <add name="FileLog"/>
             <!-- Uncomment the below section to write to the Application Event Log -->
             <!--<add name="EventLog"/>-->
         </listeners>
      </source>
    </sources>
    <switches>
      <add name="DefaultSwitch" value="Information" />
    </switches>
    <sharedListeners>
      <add name="FileLog"
           type="Microsoft.VisualBasic.Logging.FileLogTraceListener, Microsoft.VisualBasic, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" 
           initializeData="FileLogWriter"/>
      <!-- Uncomment the below section and replace APPLICATION_NAME with the name of your application to write to the Application Event Log -->
      <!--<add name="EventLog" type="System.Diagnostics.EventLogTraceListener" initializeData="APPLICATION_NAME"/> -->
    </sharedListeners>
  </system.diagnostics>
</configuration>

Answer 1

Ok here is an axample :
1- Your app.config should look like this :

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <connectionStrings>
    <add name="Amlakconn" connectionString ="Data Source=KHASHAYAR-PC\SQLEXPRESS;Initial Catalog=Amlak;Integrated Security=True"/>
  </connectionStrings>
</configuration>

2- and in your code you can access the connectionsttring this way :

private string conn = ConfigurationManager.ConnectionStrings["Amlakconn"].ConnectionString;

go try It 😉