单个配置键的多个值

尝试

<add key="mykey" value="A,B,C"/>

和

string[] mykey = ConfigurationManager.AppSettings["mykey"].Split(',');

配置文件将每一行视为一个分配,这就是为什么您只看到最后一行的原因。当它读取配置时,它会给你的键分配值“A”,然后是“B”,然后是“C”,因为“C”是最后一个值,所以它是坚持的值。

正如@kevin建议的那样,最好的方法可能是一个值,它的内容是一个csv,您可以对其进行解析。

我知道我迟到了,但我发现这个解决方案非常有效,所以我想和大家分享一下。

一切都是为了定义你自己 ConfigurationElement

namespace Configuration.Helpers
{
    public class ValueElement : ConfigurationElement
    {
        [ConfigurationProperty("name", IsKey = true, IsRequired = true)]
        public string Name
        {
            get { return (string) this["name"]; }
        }
    }

    public class ValueElementCollection : ConfigurationElementCollection
    {
        protected override ConfigurationElement CreateNewElement()
        {
            return new ValueElement();
        }


        protected override object GetElementKey(ConfigurationElement element)
        {
            return ((ValueElement)element).Name;
        }
    }

    public class MultipleValuesSection : ConfigurationSection
    {
        [ConfigurationProperty("Values")]
        public ValueElementCollection Values
        {
            get { return (ValueElementCollection)this["Values"]; }
        }
    }
}

在app.config中,只需使用新的部分:

<configSections>
    <section name="PreRequest" type="Configuration.Helpers.MultipleValuesSection,
    Configuration.Helpers" requirePermission="false" />
</configSections>

<PreRequest>
    <Values>
        <add name="C++"/>
        <add name="Some Application"/>
    </Values>
</PreRequest>

当检索这样的数据时:

var section = (MultipleValuesSection) ConfigurationManager.GetSection("PreRequest");
var applications = (from object value in section.Values
                    select ((ValueElement)value).Name)
                    .ToList();

最后感谢原著的作者 post

你想做的是不可能的。您要么对每个键进行不同的命名,要么执行value=“a,b,c”之类的操作,并在代码中分离出不同的值。 string values = value.split(',') .

它将始终获取上次定义的键的值(在示例C中)。

我认为,您可以使用自定义配置部分 http://www.4guysfromrolla.com/articles/032807-1.aspx

自从 ConfigurationManager.AppSettings.GetValues() 方法不起作用,我使用了下面的解决方法来获得类似的效果,但是需要在键后面加上唯一索引。

var name = "myKey";
var uniqueKeys = ConfigurationManager.AppSettings.Keys.OfType<string>().Where(
    key => key.StartsWith(name + '[', StringComparison.InvariantCultureIgnoreCase)
);
var values = uniqueKeys.Select(key => ConfigurationManager.AppSettings[key]);

这将匹配以下键 myKey[0] 和 myKey[1] .

以下是完整的解决方案: ASPX.CS中的代码

namespace HelloWorld
{
    public partial class _Default : Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            UrlRetrieverSection UrlAddresses = (UrlRetrieverSection)ConfigurationManager.GetSection("urlAddresses");
        }
    }

    public class UrlRetrieverSection : ConfigurationSection
    {
        [ConfigurationProperty("", IsDefaultCollection = true,IsRequired =true)]
        public UrlCollection UrlAddresses
        {
            get
            {
                return (UrlCollection)this[""];
            }
            set
            {
                this[""] = value;
            }
        }
    }


    public class UrlCollection : ConfigurationElementCollection
    {
        protected override ConfigurationElement CreateNewElement()
        {
            return new UrlElement();
        }
        protected override object GetElementKey(ConfigurationElement element)
        {
            return ((UrlElement)element).Name;
        }
    }

    public class UrlElement : ConfigurationElement
    {
        [ConfigurationProperty("name", IsRequired = true, IsKey = true)]
        public string Name
        {
            get
            {
                return (string)this["name"];
            }
            set
            {
                this["name"] = value;
            }
        }

        [ConfigurationProperty("url", IsRequired = true)]
        public string Url
        {
            get
            {
                return (string)this["url"];
            }
            set
            {
                this["url"] = value;
            }
        }

    }
}

在网络配置中

<configSections>
   <section name="urlAddresses" type="HelloWorld.UrlRetrieverSection" />
</configSections>
<urlAddresses>
    <add name="Google" url="http://www.google.com" />
   <add name="Yahoo"  url="http://www.yahoo.com" />
   <add name="Hotmail" url="http://www.hotmail.com/" />
</urlAddresses>

我接受JJS的回复: 配置文件:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="List1" type="System.Configuration.AppSettingsSection, System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
    <section name="List2" type="System.Configuration.AppSettingsSection, System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
  </configSections>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
    </startup>
  <List1>
    <add key="p-Teapot" />
    <add key="p-drongo" />
    <add key="p-heyho" />
    <add key="p-bob" />
    <add key="p-Black Adder" />
  </List1>
  <List2>
    <add key="s-Teapot" />
    <add key="s-drongo" />
    <add key="s-heyho" />
    <add key="s-bob"/>
    <add key="s-Black Adder" />
  </List2>

</configuration>

要检索到字符串[]中的代码

 private void button1_Click(object sender, EventArgs e)
    {

        string[] output = CollectFromConfig("List1");
        foreach (string key in output) label1.Text += key + Environment.NewLine;
        label1.Text += Environment.NewLine;
        output = CollectFromConfig("List2");
        foreach (string key in output) label1.Text += key + Environment.NewLine;
    }
    private string[] CollectFromConfig(string key)
    {
        NameValueCollection keyCollection = (NameValueCollection)ConfigurationManager.GetSection(key);
        return keyCollection.AllKeys;
    }

依我看,这很简单。请随意证明我错了:)

我使用钥匙的命名规则,它的工作方式很有魅力

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="section1" type="System.Configuration.NameValueSectionHandler"/>
  </configSections>
  <section1>
    <add key="keyname1" value="value1"/>
    <add key="keyname21" value="value21"/>
    <add key="keyname22" value="value22"/>
  </section1>
</configuration>

var section1 = ConfigurationManager.GetSection("section1") as NameValueCollection;
for (int i = 0; i < section1.AllKeys.Length; i++)
{
    //if you define the key is unique then use == operator
    if (section1.AllKeys[i] == "keyName1")
    {
        // process keyName1
    }

    // if you define the key as a list, starting with the same name, then use string StartWith function
    if (section1.AllKeys[i].Startwith("keyName2"))
    {
        // AllKeys start with keyName2 will be processed here
    }
}