CODEWITHSUNDEEP
c#xml
user3714203
user3714203

Reputation: 111

Object reference not set to an instance of an object app.config

This is my app.config that I added at the root of my project(type:ClassLibrary) : 

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
   <connectionStrings>
     <add name="POS_DEV_GIL-001" connectionString="Server=FACOX\SQLEXPRESSPOS;Database=POS_DEV_GIL-001;Trusted_Connection=true" providerName="System.Data.SqlClient" />
   </connectionStrings>
</configuration>

I added as reference the System.Configuration.dll

In my code, I do that :

using System.configuration;
//rest of the code
String connec = ConfigurationManager.ConnectionStrings["POS_DEV_GIL-001"].ConnectionString;

And I get the following error :

object reference not set to an instance of an object

Do you have a solution?

Upvotes: 0

Views: 4231

Answers (1)

maccettura
maccettura

Reputation: 10818

You mentioned the project is a Class Library. Meaning on compile it is not an executable, but a DLL. Class libraries will, by default, look to the application that executes it for its config files. What application are you running that uses the class library? Make sure the application that uses this library has an app.config or a web.config with the connection string:

<add name="POS_DEV_GIL-001" connectionString="Server=FACOX\SQLEXPRESSPOS;Database=POS_DEV_GIL-001;Trusted_Connection=true" providerName="System.Data.SqlClient" />

Upvotes: 4

Related Questions