我正在尝试使用ConfigurationManager.AppSettings.GetValues()
为单个密钥检索多个配置值,但我总是收到一个只包含最后一个值的数组。我的appsettings.config
看起来像
<add key="mykey" value="A"/>
<add key="mykey" value="B"/>
<add key="mykey" value="C"/>
我试图用
访问ConfigurationManager.AppSettings.GetValues("mykey");
但我只是{ "C" }
。
关于如何解决这个问题的任何想法?
答案 0 :(得分:41)
尝试
<add key="mykey" value="A,B,C"/>
并且
string[] mykey = ConfigurationManager.AppSettings["mykey"].Split(',');
答案 1 :(得分:11)
配置文件将每一行视为一个赋值,这就是为什么你只看到最后一行。当它读取配置时,它会为你的键分配“A”的值,然后是“B”,然后是“C”,并且由于“C”是最后一个值,它就是那个坚持的值。
正如@Kevin建议的那样,最好的方法可能是一个值,其内容是一个可以解析的CSV。
答案 2 :(得分:9)
我知道我迟到但我找到了这个解决方案并且它完美无缺,所以我只想分享。
这就是定义自己的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中使用您的新部分:
<configSections>
<section name="PreRequest" type="Configuration.Helpers.MultipleValuesSection,
Configuration.Helpers" requirePermission="false" />
</configSections>
<PreRequest>
<Values>
<add name="C++"/>
<add name="Some Application"/>
</Values>
</PreRequest>
并且在检索数据时如下:
var section = (MultipleValuesSection) ConfigurationManager.GetSection("PreRequest");
var applications = (from object value in section.Values
select ((ValueElement)value).Name)
.ToList();
最后感谢原作post
的作者答案 3 :(得分:6)
你想做什么是不可能的。您必须以不同方式命名每个键,或者执行value =“A,B,C”之类的操作,并将代码string values = value.split(',')
中的不同值分开。
它将始终获取最后定义的键的值(在示例C中)。
答案 4 :(得分:3)
我认为您可以使用自定义配置文件http://www.4guysfromrolla.com/articles/032807-1.aspx
答案 5 :(得分:2)
由于ConfigurationManager.AppSettings.GetValues()
方法不起作用,我使用了以下解决方法来获得类似的效果,但需要使用唯一索引对键进行后缀。
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]);
这会匹配myKey[0]
和myKey[1]
等键。
答案 6 :(得分:2)
我使用键的命名约定,它就像魅力
<?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
}
}
答案 7 :(得分:1)
这是完整的解决方案: 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;
}
}
}
}
并在网络配置
<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>
答案 8 :(得分:1)
我对JJS的答复: 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>
检索到字符串[]
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;
}
IMO,这很简单。随意证明我错了:)
答案 9 :(得分:0)
我发现解决方案非常简单。如果所有键都具有相同的值,只需将唯一值用作键并忽略该值即可。
<configSections>
<section name="appSettings" type="System.Configuration.AppSettingsSection, System.Configuration, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" restartOnExternalChanges="false" requirePermission="false"/>
<section name="filelist" type="System.Configuration.AppSettingsSection, System.Configuration, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" restartOnExternalChanges="false" requirePermission="false"/>
</configSections>
<filelist>
<add key="\\C$\Temp\File01.txt"></add>
<add key="\\C$\Temp\File02.txt"></add>
<add key="\\C$\Temp\File03.txt"></add>
<add key="\\C$\Temp\File04.txt"></add>
<add key="\\C$\Temp\File05.txt"></add>
<add key="\\C$\Temp\File06.txt"></add>
<add key="\\C$\Temp\File07.txt"></add>
<add key="\\C$\Temp\File08.txt"></add>
</filelist>
然后在代码中只需使用以下内容:
private static List<string> GetSection(string section)
{
NameValueCollection sectionValues = ConfigurationManager.GetSection(section) as NameValueCollection;
return sectionValues.AllKeys.ToList();
}
结果是: