在C＃中以编程方式从app.config访问system.net设置

我试图以编程方式访问Windows应用程序app.config文件。 特别是，我试图访问“system.net/mailSettings”以下代码

Configuration config = ConfigurationManager.OpenExeConfiguration(configFileName); MailSettingsSectionGroup settings = (MailSettingsSectionGroup)config.GetSectionGroup(@"system.net/mailSettings"); Console.WriteLine(settings.Smtp.DeliveryMethod.ToString()); Console.WriteLine("host: " + settings.Smtp.Network.Host + ""); Console.WriteLine("port: " + settings.Smtp.Network.Port + ""); Console.WriteLine("Username: " + settings.Smtp.Network.UserName + ""); Console.WriteLine("Password: " + settings.Smtp.Network.Password + ""); Console.WriteLine("from: " + settings.Smtp.From + ""); 

未能给予主持人。 它只获取端口号。 其余的都是空的;

Answer 1

这对我来说似乎没问题：

 MailSettingsSectionGroup mailSettings = config.GetSectionGroup("system.net/mailSettings") as MailSettingsSectionGroup; if (mailSettings != null) { string smtpServer = mailSettings.Smtp.Network.Host; } 

这是我的app.config文件：

但是，如Nathan所述，您可以使用应用程序或计算机配置文件为所有SmtpClient对象指定默认主机，端口和凭据值。 有关更多信息，请参阅MDSN上的元素 。

Answer 2

不确定这是否有帮助，但是如果你想创建一个SmtpClient，那么如果使用默认构造函数，它将自动使用配置文件中的值。

Answer 3

我使用以下方法访问mailSettings：

 var config = ConfigurationManager.OpenExeConfiguration( ConfigurationUserLevel.None); var mailSettings = config.GetSectionGroup("system.net/mailSettings") as MailSettingsSectionGroup; 

Answer 4

 private void button1_Click(object sender, EventArgs e) { try { var config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); var mailSettings = config.GetSectionGroup("system.net/mailSettings") as MailSettingsSectionGroup; MailMessage msg = new MailMessage(); msg.Subject = "Hi Raju"; msg.To.Add("[e-mail]"); msg.From = new MailAddress("[e-mail]"); msg.Body = "Hello Raju here everything is fine."; //MailSettingsSectionGroup msetting = null; string mMailHost = mailSettings.Smtp.Network.Host; SmtpClient mailClient = new SmtpClient(mMailHost); mailClient.Send(msg); MessageBox.Show("Mail Sent Succesfully..."); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } }