app.config
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Configuration;
namespace SettingExample
{
public partial class Form1 : Form
{
string g_setting1, g_setting2, g_setting3 = "";
public Form1()
{
InitializeComponent();
Setting();
MessageBox.Show("Setting1: "+g_setting1+"\nSetting2: "+g_setting2+"\nSetting3: "+g_setting3);
}
void Setting()
{
System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
if (config.AppSettings.Settings["Setting1"] == null)
{
config.AppSettings.Settings.Add("Setting1", "default1");
}
if (config.AppSettings.Settings["Setting2"] == null)
{
config.AppSettings.Settings.Add("Setting2", "default2");
}
if (config.AppSettings.Settings["Setting3"] == null)
{
config.AppSettings.Settings.Add("Setting3", "default3");
}
config.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection("appSettings");
g_setting1 = config.AppSettings.Settings["Setting1"].Value;
g_setting2 = config.AppSettings.Settings["Setting2"].Value;
g_setting3 = config.AppSettings.Settings["Setting3"].Value;
}
}
}
App.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
<appSettings>
<add key="Setting1" value="default1" />
<add key="Setting2" value="default2" />
<add key="Setting3" value="default3" />
</appSettings>
</configuration>
