c# - 带有 sectionGroup 的自定义 ConfigurationSection 不起作用

Question

当尝试访问 ConnectionConfiguration 时，对于整数数据类型总是返回默认值或 0。不会抛出任何错误，它只是无法获取每个属性的值。请帮我解决这个问题。

我在控制台应用程序中有一个 app.config 文件，如下所示:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <sectionGroup name="templates" >
      <section name="connections" type="Test.ConnectionConfiguration, Test" allowLocation="true" allowDefinition="Everywhere"/>
    </sectionGroup>
  </configSections>
  <templates>
    <connections allowed="true" port="8080">
      <internal name="local" size="1344"/>
      <external name="internet" value="http" />
    </connections>
  </templates>
</configuration>

类

public class ConnectionConfiguration : ConfigurationSection
{
    [ConfigurationProperty("allowed", IsRequired = true)]
    public bool Allowed
    {
        get
        {
            return (bool)this["allowed"];
        }
        set
        {
            this["allowed"] = value;
        }
    }

    [ConfigurationProperty("port", IsRequired = true)]
    public int Port
    {
        get { return (int)this["port"]; }
        set { this["port"] = value; }
    }

    [ConfigurationProperty("internal")]
    public InternalElement Internal
    {
        get { return (InternalElement)this["internal"]; }
        set { this["internal"] = value; }
    }

    [ConfigurationProperty("external")]
    public ExternalElement External
    {
        get { return (ExternalElement)this["external"]; }
        set { this["external"] = value; }
    }
}
public class InternalElement : ConfigurationElement
{
    [ConfigurationProperty("name", DefaultValue = "local", IsRequired = true)]
    [StringValidator(InvalidCharacters = "~!@#$%^&*()[]{}/;'\"|\\", MinLength = 1, MaxLength = 60)]
    public string Name
    {
        get { return (string)this["name"]; }
        set { this["name"] = value; }
    }

    [ConfigurationProperty("size", DefaultValue = "1234", IsRequired = false)]
    [IntegerValidator(ExcludeRange = false, MaxValue = 6000, MinValue = 1)]
    public int Size
    {
        get { return (int)this["size"]; }
        set { this["size"] = value; }
    }
}
public class ExternalElement : ConfigurationElement
{
    [ConfigurationProperty("name", DefaultValue = "local", IsRequired = true)]
    [StringValidator(InvalidCharacters = "~!@#$%^&*()[]{}/;'\"|\\", MinLength = 1, MaxLength = 60)]
    public string Name
    {
        get { return (string)this["name"]; }
        set { this["name"] = value; }
    }

    [ConfigurationProperty("value", DefaultValue = "https", IsRequired = false)]
    public string Value
    {
        get { return (string)this["value"]; }
        set { this["value"] = value; }
    }
}

提前致谢!

ConnectionConfiguration config = new ConnectionConfiguration();
int test = config.Port; // it should be 8080 but it's 0

Answer 1

不幸的是，仅仅创建配置处理程序的新实例并不会自动用配置数据填充它。你必须手动阅读。为了实现这一点，您可以在 ConnectionConfiguration 类中添加一个静态属性，例如:

public class ConnectionConfiguration : ConfigurationSection
{
    private static ConnectionConfiguration connections = ConfigurationManager.GetSection("templates/connections") as ConnectionConfiguration;
    public static ConnectionConfiguration Connections
    {
        get
        {
            return connections;
        }
    }
 // the rest is the same
}

在您的应用程序中，您现在可以像这样访问自定义配置部分:

ConnectionConfiguration config = ConnectionConfiguration.Connections;
int test = config.Port; // it should now be 8080