app.config 中的自定义配置部分无法读取 xml 数据作为 C# 应用程序中的集合

Question

我有如下 class 扩展的 ApplicationSettingsBase

public class SMTPServerConfig : ApplicationSettingsBase
{
    private static SMTPServerConfig instance = (SMTPServerConfig)Synchronized(new SMTPServerConfig());

    public static SMTPServerConfig Instance { get { return instance; } }

    [ApplicationScopedSetting]
    [DefaultSettingValue("")]
    [SettingsSerializeAs(System.Configuration.SettingsSerializeAs.Xml)]
    public List<SMTPServerConfigItem> SMTPServers
    {
        get
        {
            return ((List<SMTPServerConfigItem>)(this["SMTPServers"]));
        }
    }

    [ApplicationScopedSetting]
    [DefaultSettingValue("")]
    [SettingsSerializeAs(System.Configuration.SettingsSerializeAs.String)]
    public string TestProp
    {
        get
        {
            return ((string)(this["TestProp"]));
        }
    }
}

[Serializable]
public class SMTPServerConfigItem
{
    
    public string SMTPHost { get; set; }
    public string SMTPPort { get; set; }
    public string SMTPAccount { get; set; }
    public string SMTPPassword { get; set; }
}

这是我的 App.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>

    <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
      <section name="Example.Config.SMTPServerConfig" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    </sectionGroup>

  </configSections>


  <applicationSettings>
    <Example.Config.SMTPServerConfig>
      <setting name="TestProp" serializeAs="String">
        <value>123123</value>
      </setting>
      <setting name="SMTPServers" serializeAs="Xml">
        <value>
          <SMTPServerConfigItem>
            <SMTPHost>smtp.example.com</SMTPHost>
            <SMTPPort>123</SMTPPort>
            <SMTPAccount>admin@example.com</SMTPAccount>
            <SMTPPassword>123456</SMTPPassword>
          </SMTPServerConfigItem>

          <SMTPServerConfigItem>
            <SMTPHost>smtp.example.com</SMTPHost>
            <SMTPPort>123</SMTPPort>
            <SMTPAccount>admin@example.com</SMTPAccount>
            <SMTPPassword>123456</SMTPPassword>
          </SMTPServerConfigItem>

        </value>

      </setting>
    </Example.Config.SMTPServerConfig>
  </applicationSettings>

</configuration>

当我使用 SMTPServerConfig.Instance.TestProp 时，它会显示结果为“123123”（这是真实值，这意味着我有正确的配置架构），但 SMTPServerConfig.Instance.SMTPServers.Count 始终为零。我的代码或配置文件哪里错了？

Answer 1

经过一个小时的研究，我在 Whosebug 中发现了一个问题，然后我知道我错在哪里了。我在 app.config 文件中缺少一个 xml 标签。题： Trying to create a custom partial settings file

那么现在我将更正我的 App.config 文件

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>

    <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
      <section name="Example.Config.SMTPServerConfig" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    </sectionGroup>

  </configSections>


  <applicationSettings>
    <Example.Config.SMTPServerConfig>
      <setting name="TestProp" serializeAs="String">
        <value>123123</value>
      </setting>
      <setting name="SMTPServers" serializeAs="Xml">
        <value>
          <ArrayOfSMTPServerConfigItem>
            <SMTPServerConfigItem>              
              <SMTPHost>smtp.example.com</SMTPHost>
              <SMTPPort>123</SMTPPort>
              <SMTPAccount>admin@example.com</SMTPAccount>
              <SMTPPassword>123456</SMTPPassword>
            </SMTPServerConfigItem>

            <SMTPServerConfigItem>              
              <SMTPHost>smtp.example.com</SMTPHost>
              <SMTPPort>123</SMTPPort>
              <SMTPAccount>admin@example.com</SMTPAccount>
              <SMTPPassword>123456</SMTPPassword>
            </SMTPServerConfigItem>
          </ArrayOfSMTPServerConfigItem>

        </value>

      </setting>
    </Example.Config.SMTPServerConfig>
  </applicationSettings>

</configuration>

添加ArrayOfSMTPServerConfigItem标签后，即可解决此问题。

app.config 中的自定义配置部分无法读取 xml 数据作为 C# 应用程序中的集合

Custom configuration section in app.config cannot read xml data as collection in C# application

c#

app-config

configurationmanager

configurationsection