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Connectionstring  App.config / App.Settings

Posted on 2009-05-14
2
2,697 Views
Last Modified: 2012-05-07
I have a strage problem. When trying to read the connectionstring from App.config (System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString) I get Null Reference Exception even if the connection string is correct written in the App.config file. I have also set correct reference to the System.configuration.dll. When I put the connectionsting in a App.settings file it works without problems. I have tried everything and is going nuts. What can cause this problem?

Please see attached code :)
-----------------------------

App.config

-----------------------------
 

<?xml version="1.0" encoding="utf-8" ?>

<configuration>

	<configSections></configSections>

	<connectionStrings>

  <add name="ConnectionString" connectionString="Data Source=localhost;Initial Catalog=Rank;Persist Security Info=True;User ID=Rank;Password=Password;"

   providerName="System.Data.SqlClient" />

  <add name="Rank.App.ConnectionString" connectionString="Data Source=localhost;Initial Catalog=Rank;Persist Security Info=True;User ID=Rank;Password=Password;" />

 </connectionStrings>

</configuration>
 

namespace Rank

{

    public class Common

    {

        public class Data

        {

            public static string ConnectionString

            {

                get

                {

                    //THIS DONT WORK:

                    //return System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
 

                    //THIS WORK PERFECT:

                    return App.Default.ConnectionString.ToString();

                }

            }

        }

    }

}

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Question by:webressurs
2 Comments
 
LVL 6

Accepted Solution

by:
HarryNS earned 250 total points
ID: 24384756
MessageBox.Show(System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);

With the app.config you mentioned, when I tried here I am able to retrieve the following result,

Data Source=localhost;Initial Catalog=Rank;Persist Security Info=True;User ID=Rank;Password=Password;
0
 
LVL 7

Assisted Solution

by:csharpp
csharpp earned 250 total points
ID: 24558275
Use this:

return System.Configuration.ConfigurationManager.ConnectionStrings["Rank.App.ConnectionString"].ConnectionString;

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