ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString cannot return connection string

Question

Hi,

I want to use  ConfigurationManager to return my connection string, but I got an error "Object reference not set to an instance of an object."

The code is

  return (string)System.Configuration.ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString;

My MyConnectionString is in the app.config saved in the same folder of cs file that issues the command.

My application is WCF windows application. I am using vs2010.

Thanks

 

Answer 1

Hi,

I found the problem. the configurationManager look at the app.Config under the host project rathr than the current project.

Answer 2

Hi peter,

Thanks for your experience here.

Have a nice day.

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Alan Chen[MSFT]
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