Sunday, 13 January 2013 15:54

how to access and update appSettings in config file of windows application

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you can put application specific settings in the
appSettings section of your app.config file in your
c# windows form application.you can access,edit,update
those settings.I show you how -

I added some settings in the app.config file -
<appSettings>
<add key="server" value="smtp.gmail.com" />
<add key="username" value="This email address is being protected from spambots. You need JavaScript enabled to view it." />
<add key="password" value="password" />
</appSettings>

then in the specific form's code,i added the following
lines to access those settings -

textBox1.Text = ConfigurationManager.AppSettings["server"];
textBox2.Text = ConfigurationManager.AppSettings["username"];
textBox3.Text = ConfigurationManager.AppSettings["password"];

then i added a button to update settings.when clicked
on the button the event method does that -

private void UpdateButton_Click_1(object sender, EventArgs e)
{
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

config.AppSettings.Settings["server"].Value = textBox1.Text;
config.AppSettings.Settings["username"].Value = textBox2.Text;
config.AppSettings.Settings["password"].Value = textBox3.Text;

config.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection("appSettings");

}

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