Question

您好我们有一个业务逻辑层，它有一个电子邮件服务类。在这个类中，我们有一个方法可以创建一个电子邮件（这部分工作和编译很好）。但是，当我们尝试访问应用程序配置文件以便测试该方法时，我们会收到错误消息 - 无法检索应用程序配置邮件设置，并且如果不是，则表示所有值都为空。以下是我们代码的应用配置部分：

<mailSettings>
  <smtp deliveryMethod="Network" from="info@example.com">
    <network host="localhost" port="25" defaultCredentials="true"/>
  </smtp>
</mailSettings>

以下是我们用来连接app.config的代码：

private System.Net.Configuration.MailSettingsSectionGroup mailSettings;

SmtpClient client = new SmtpClient(mailSettings.Smtp.Network.Host, mailSettings.Smtp.Network.Port);

我们在这里做错了什么？

Answer 1

您的mailSettings变量未初始化为任何内容 - 它不会神奇地包含您的配置。

您需要使用ConfigurationManager类来访问它（如果尚未添加，请记住添加对System.Configuration的引用。）您还需要为以下内容添加using System.Net.Configuration代码。

SmtpSection smtpSection = ConfigurationManager.GetSection("system.net/mailSettings/smtp") as SmtpSection;

if (smtpSection != null)
{
    SmtpClient client = new SmtpClient(smtpSection.Network.Host, smtpSection.Network.Port);
}

Answer 2

SmtpSection smtpSection = ConfigurationManager.GetSection("system.net/mailSettings/smtp") as SmtpSection;
if (smtpSection != null) {
    SmtpClient client = new SmtpClient(smtpSection.Network.Host, smtpSection.Network.Port);
}

Answer 3

<mailSettings>

  <smtp>

    <network host="smtp.mailserver.com" password="password" userName="username"/>

  </smtp>

</mailSettings>

然后 public static bool SendEmail（string sender，string recipient，string subject，string body）

    {

        try

        {

            Configuration mConfigurationFile = ConfigurationManager.OpenExeConfiguration("D:\\Projects\\EmailSolution\\Email\\App.config");

            MailSettingsSectionGroup mMailSettings = mConfigurationFile.GetSectionGroup("system.net/mailSettings") as MailSettingsSectionGroup;



            string mHost = string.Empty;



            if (mMailSettings != null)

            {

                //int mPort = mMailSettings.Smtp.Network.Port;

                mHost = mMailSettings.Smtp.Network.Host;

                //string mPassword = mMailSettings.Smtp.Network.Password;

                //string mUsername = mMailSettings.Smtp.Network.UserName;

            }

            //Allows applications to send e-mail by using the Simple Mail Transfer Protocol (SMTP).

            SmtpClient mailClient = new SmtpClient(mHost);



            //Sends an e-mail message to an SMTP server for delivery.

            mailClient.Send(EmailMessage.CreateEmailMessage(sender, recipient, subject, body));



            return true;

        }

尝试访问App.config文件以获取邮件设置但无法正常工作

3 个答案: