Question

i have a config file like this:

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

configuration

  appSettings

    add key="PortName" value="COM4"

    add key="BaudRate" value="9600"

   add key="DataBits" value="8" 

  appSettings

configuration

… and then i want to access app.config values with this code:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO.Ports;

using System.Configuration;


namespace SystemToControler

{

    public class ConnectionProtocol : IConnectionProtocol
    {
        SerialPort serialPort = new SerialPort();

        public ConnectionProtocol()
        {
            serialPort.PortName = ConfigurationManager.AppSettings["PortName"];
            serialPort.BaudRate = Convert.ToInt32(ConfigurationManager.AppSettings["BaudRate"]);
            serialPort.DataBits = Convert.ToInt32(ConfigurationManager.AppSettings["DataBits"]);
        }
    }
}

… and it tells me i that those keys does not exist.

What am i doing wrong??? Please help!

Answer 1

Wild guess inferred from comments: be sure to put your config in the app.config of the running app. Configuration from other projects are never read.

example:
If you have a solution with 2 projects, ClassLibrary1 with an app.config and Winform1 with its own app.setting, and Winform1 depends on ClassLibrary1, building Winform1 will give a directory with those files:

ClassLibrary1.dll

ClassLibrary.dll.config

Winform1.exe

Winform1.exe.config

When Winform1.exe is running, the configuration is read from Winform1.exe.config, all other configuration files are useless.