C# 在C中以编程方式从app.config访问system.net设置#

我正在尝试以编程方式访问Windows应用程序app.config文件。特别是，我正在尝试访问“system.net/mailSettings” 下面的代码

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 + "");

---

未能从提供主机。它只获取端口号。其余为空

不确定这是否有帮助，但如果您尝试创建SmtpClient，如果您使用默认构造函数，它将自动使用配置文件中的值。

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：

<configuration>
  <system.net>
    <mailSettings>
      <smtp>
        <network host="mail.mydomain.com" />
      </smtp>
    </mailSettings>
  </system.net>
</configuration>

---

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

我使用以下方法访问邮件设置：

var config = ConfigurationManager.OpenExeConfiguration(
    ConfigurationUserLevel.None);

var mailSettings = config.GetSectionGroup("system.net/mailSettings") 
    as MailSettingsSectionGroup;

---

请发布配置文件中有问题的部分。smtp设置。。。我正在尝试访问system.net设置..+1使用SmtpClient上的默认构造函数，它将为您完成所有这些操作。它与我尝试读取的程序配置文件不同。。。另一个程序正在读取配置信息。。。

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("raju@hasten.in");
        msg.From = new MailAddress("hasten.c@hasten.in");
        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());
    }
}