如何动态使用不同的数据型填充值？ C＃

Question

我制作了一个SMTP控制台应用程序，现在我试图将所有检查放在一起，以避免使用过多的“几乎”重复if语句。

因此，我做了一个foreach循环，以尝试使用AppConfig文件填充我在开始实现的所有值。

            int port = 0;
            bool useCredentials = false;
            string username = "";
            string password = "";
            bool useSsl = false;
            string receiver = "";
            string sender = "";
            string subject = "";
            string body = "";

            bool error = false;

            string[] values = { "smtpServer", "port", "useCredentials", "username", "password", "useSsl", "receiver", "sender", "subject", "body" };

            foreach(var val in values)
            {
                if (ConfigurationManager.AppSettings[val] == null || ConfigurationManager.AppSettings[val].Length == 0)
                {
                    Console.WriteLine(val+" is null");
                    error = true;
                }
                else
                {
                    {
                        //i want the val to be filled, so first smtpServer then port then useCredentials and so on...
                        val = ConfigurationManager.AppSettings[val]?.ToString();
                    }
                    
                    Console.WriteLine(val);
                }
            }

如何填充我在顶部实现的每个字段的值？

Answer 1

好的，我认为您需要将主意转变为客观的编程。

创建类：

public class AppSettings
{
            public int port {get; set;}
            public bool useCredentials {get; set;}
            public string username {get; set;}
            public string password {get; set;}
            public bool useSsl {get; set;}
            public string receiver {get; set;}
            public string sender {get; set;}
            public string subject {get; set;}
            public string body = {get; set;}
            public bool error = {get; set;}
}

并且不使用foreach，您不需要。您想将您的配置对此对象进行验证，因此：

var appSettingsSection = Configuration.GetSection("AppSettings");
services.Configure<AppSettings>(appSettingsSection);
var appSettings = appSettingsSection.Get<AppSettings>();

然后可以将其用作appSettings.port