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c# - ConfigurationErrorsException "Invalid Key Value",我做错了什么?

转载 作者:行者123 更新时间:2023-11-30 15:09:32 26 4
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我有一个简单的控制台应用程序,旨在在我运行它时读取自定义配置异常(下面的代码) 我在调用 ConfigurationManager.GetSection 时收到带有消息“无效键值”的 ConfigurationErrorsException。谁能看出我做错了什么?

配置文件

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="MySection" type="ConsoleApplication1.MySection, ConsoleApplication1" />
</configSections>
<MySection>
<add name="MyName" value="MyValue" />
</MySection>
</configuration>

代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Serialization;
using System.Configuration;

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
MySection section = (MySection)ConfigurationManager.GetSection("MySection");

Console.WriteLine("Done");
}
}

public class MySection : ConfigurationSection
{
[ConfigurationProperty("", IsDefaultCollection = true)]
public MyCollection Collection
{
get
{
return (MyCollection)this[""];
}
}
}

public class MyCollection : ConfigurationElementCollection
{
protected override ConfigurationElement CreateNewElement()
{
return new MyElement();
}

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

public class MyElement : ConfigurationElement
{
[ConfigurationProperty("name")]
public string Name { get; set; }

[ConfigurationProperty("value")]
public string Value { get; set; }


}
}

异常

System.Configuration.ConfigurationErrorsException was unhandled
Message=Invalid key value. (C:\Users\martin.brown\documents\visual studio 2010\Projects\ConsoleApplication1\bin\Debug\ConsoleApplication1.vshost.exe.config line 7)
Source=System.Configuration
BareMessage=Invalid key value.
Filename=C:\Users\martin.brown\documents\visual studio 2010\Projects\ConsoleApplication1\bin\Debug\ConsoleApplication1.vshost.exe.config
Line=7
StackTrace:
at System.Configuration.BaseConfigurationRecord.EvaluateOne(String[] keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult)
at System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSection(String configKey)
at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName)
at System.Configuration.ConfigurationManager.GetSection(String sectionName)
at ConsoleApplication1.Program.Main(String[] args) in C:\Users\martin.brown\documents\visual studio 2010\Projects\ConsoleApplication1\Program.cs:line 14
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException:

最佳答案

我还没有看到自定义部分以您尝试的方式定义。但是,您可以通过进行一些小的更改来使其正常工作

更改您的配置:

...
<MySection>
<add name="MyName" value="MyValue" />
</MySection>
...

到:

...
<MySection>
<MyElements>
<add name="MyName" value="MyValue" />
</MyElements>
</MySection>
...

然后稍微修改你的代码:

public class MySection : ConfigurationSection
{
[ConfigurationProperty("MyElements", IsDefaultCollection = true)]
public MyCollection Collection{get {return (MyCollection) this["MyElements"];}}
}

public class MyElement : ConfigurationElement
{
[ConfigurationProperty("name")]
public string Name
{
get {return (string) (base["name"]);}
set {base["name"] = value;}
}

[ConfigurationProperty("value")]
public string Value
{
get {return (string) (base["value"]);}
set {base["value"] = value;}
}
}

(MyCollection 类保持不变)

这将起作用,并且还可以让您在配置中添加多个值:

...
<MySection>
<MyElements>
<add name="MyName1" value="MyValu1e" />
<add name="MyName2" value="MyValue2" />
</MyElements>
</MySection>
...

关于c# - ConfigurationErrorsException "Invalid Key Value",我做错了什么?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/4376747/

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