实现自定义配置节处理程序
从各种来源(包括 stackOverlflow)收集信息,但是当我开始使用它时,我收到以下错误消息
“配置属性‘deviceconfig’可能不是从 ConfigurationSection 派生的。”
我现在已经在这个问题上挣扎了一整天了,而且还没有找到解决方案,所以在这件事上的任何帮助将不胜感激。我是实现自定义配置部分的新手,所以请温柔地对待我:-)
app.config 文件如下所示:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="deviceconfig" type="CNIMonitor.Core.CustomConfig.DeviceConfig,Core"/>
</configSections>
<system.diagnostics>
<sources>
<!-- This section defines the logging configuration for My.Application.Log -->
<source name="DefaultSource" switchName="DefaultSwitch">
<listeners>
<add name="FileLog"/>
<!-- Uncomment the below section to write to the Application Event Log -->
<!--<add name="EventLog"/>-->
</listeners>
</source>
</sources>
<switches>
<add name="DefaultSwitch" value="Information" />
</switches>
<sharedListeners>
<add name="FileLog"
type="Microsoft.VisualBasic.Logging.FileLogTraceListener, Microsoft.VisualBasic, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL"
initializeData="FileLogWriter"/>
<!-- Uncomment the below section and replace APPLICATION_NAME with the name of your application to write to the Application Event Log -->
<!--<add name="EventLog" type="System.Diagnostics.EventLogTraceListener" initializeData="APPLICATION_NAME"/> -->
</sharedListeners>
</system.diagnostics>
<deviceconfig>
<devices>
<device deviceid = "1"
name = "localhost"
ipaddress="127.0.0.1"
port="10000"
status="not listening"
message="no message"
/>
<device deviceid ="2"
name ="2nd localhost"
ipaddress="127.0.0.1"
port="20000"
status="not listening"
message="no message"
/>
</devices>
</deviceconfig>
自定义部分处理程序代码如下:
Imports System.Configuration
命名空间 CNIMonitor.Core.CustomConfig
Public Class DeviceConfig
Inherits ConfigurationSection
<ConfigurationProperty("deviceconfig")> _
Public ReadOnly Property DeviceConfig() As DeviceConfig
Get
Return CType(MyBase.Item("deviceconfig"), DeviceConfig)
End Get
End Property
End Class
<ConfigurationCollectionAttribute(GetType(Device))> _
Public Class Devices
Inherits ConfigurationElementCollection
Protected Overrides Function CreateNewElement() As ConfigurationElement
Return New Device
End Function
Protected Overrides Function GetElementKey _
(ByVal element As ConfigurationElement) As Object
Return CType(element, Device).DeviceID
End Function
Public Sub Add(ByVal element As Device)
Me.BaseAdd(element)
End Sub
End Class
Public Class Device
Inherits ConfigurationElement
<ConfigurationProperty("deviceid", DefaultValue:="", IsKey:=True, IsRequired:=True)> _
Public Property DeviceID() As String
Get
Return CType(MyBase.Item("deviceid"), String)
End Get
Set(ByVal value As String)
MyBase.Item("deviceid") = value
End Set
End Property
<ConfigurationProperty("hostname", DefaultValue:="", IsKey:=True, IsRequired:=False)> _
Public Property HostName() As String
Get
Return CType(MyBase.Item("RegisteredDate"), String)
End Get
Set(ByVal value As String)
MyBase.Item("RegisteredDate") = value
End Set
End Property
<ConfigurationProperty("ipaddress", DefaultValue:="", IsKey:=True, IsRequired:=False)> _
Public Property IpAddress() As String
Get
Return CType(MyBase.Item("ipaddress"), String)
End Get
Set(ByVal value As String)
MyBase.Item("ipaddress") = value
End Set
End Property
<ConfigurationProperty("port", DefaultValue:="", IsKey:=True, IsRequired:=False)> _
Public Property Port() As String
Get
Return CType(MyBase.Item("port"), String)
End Get
Set(ByVal value As String)
MyBase.Item("port") = value
End Set
End Property
<ConfigurationProperty("status", DefaultValue:="", IsKey:=False, IsRequired:=False)> _
Public Property Status() As String
Get
Return CType(MyBase.Item("status"), String)
End Get
Set(ByVal value As String)
MyBase.Item("status") = value
End Set
End Property
<ConfigurationProperty("message", DefaultValue:="", IsKey:=False, IsRequired:=False)> _
Public Property Message() As String
Get
Return CType(MyBase.Item("message"), String)
End Get
Set(ByVal value As String)
MyBase.Item("message") = value
End Set
End Property
End Class
End Namespace
gleanings from a variety of sources (including stackOverlflow), however when I come to use it, I get the following error message
"The Configuration property 'deviceconfig' may not be derived from ConfigurationSection."
I have been struggling with this for the better part of a day now, and am no nearer a solution, so any help in the matter would be greatly appreciated. I am a newbie in implementing custom config sections so please treat me gently :-)
The app.config file looks like this:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="deviceconfig" type="CNIMonitor.Core.CustomConfig.DeviceConfig,Core"/>
</configSections>
<system.diagnostics>
<sources>
<!-- This section defines the logging configuration for My.Application.Log -->
<source name="DefaultSource" switchName="DefaultSwitch">
<listeners>
<add name="FileLog"/>
<!-- Uncomment the below section to write to the Application Event Log -->
<!--<add name="EventLog"/>-->
</listeners>
</source>
</sources>
<switches>
<add name="DefaultSwitch" value="Information" />
</switches>
<sharedListeners>
<add name="FileLog"
type="Microsoft.VisualBasic.Logging.FileLogTraceListener, Microsoft.VisualBasic, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL"
initializeData="FileLogWriter"/>
<!-- Uncomment the below section and replace APPLICATION_NAME with the name of your application to write to the Application Event Log -->
<!--<add name="EventLog" type="System.Diagnostics.EventLogTraceListener" initializeData="APPLICATION_NAME"/> -->
</sharedListeners>
</system.diagnostics>
<deviceconfig>
<devices>
<device deviceid = "1"
name = "localhost"
ipaddress="127.0.0.1"
port="10000"
status="not listening"
message="no message"
/>
<device deviceid ="2"
name ="2nd localhost"
ipaddress="127.0.0.1"
port="20000"
status="not listening"
message="no message"
/>
</devices>
</deviceconfig>
The Custom Section Handler code as follows:
Imports System.Configuration
Namespace CNIMonitor.Core.CustomConfig
Public Class DeviceConfig
Inherits ConfigurationSection
<ConfigurationProperty("deviceconfig")> _
Public ReadOnly Property DeviceConfig() As DeviceConfig
Get
Return CType(MyBase.Item("deviceconfig"), DeviceConfig)
End Get
End Property
End Class
<ConfigurationCollectionAttribute(GetType(Device))> _
Public Class Devices
Inherits ConfigurationElementCollection
Protected Overrides Function CreateNewElement() As ConfigurationElement
Return New Device
End Function
Protected Overrides Function GetElementKey _
(ByVal element As ConfigurationElement) As Object
Return CType(element, Device).DeviceID
End Function
Public Sub Add(ByVal element As Device)
Me.BaseAdd(element)
End Sub
End Class
Public Class Device
Inherits ConfigurationElement
<ConfigurationProperty("deviceid", DefaultValue:="", IsKey:=True, IsRequired:=True)> _
Public Property DeviceID() As String
Get
Return CType(MyBase.Item("deviceid"), String)
End Get
Set(ByVal value As String)
MyBase.Item("deviceid") = value
End Set
End Property
<ConfigurationProperty("hostname", DefaultValue:="", IsKey:=True, IsRequired:=False)> _
Public Property HostName() As String
Get
Return CType(MyBase.Item("RegisteredDate"), String)
End Get
Set(ByVal value As String)
MyBase.Item("RegisteredDate") = value
End Set
End Property
<ConfigurationProperty("ipaddress", DefaultValue:="", IsKey:=True, IsRequired:=False)> _
Public Property IpAddress() As String
Get
Return CType(MyBase.Item("ipaddress"), String)
End Get
Set(ByVal value As String)
MyBase.Item("ipaddress") = value
End Set
End Property
<ConfigurationProperty("port", DefaultValue:="", IsKey:=True, IsRequired:=False)> _
Public Property Port() As String
Get
Return CType(MyBase.Item("port"), String)
End Get
Set(ByVal value As String)
MyBase.Item("port") = value
End Set
End Property
<ConfigurationProperty("status", DefaultValue:="", IsKey:=False, IsRequired:=False)> _
Public Property Status() As String
Get
Return CType(MyBase.Item("status"), String)
End Get
Set(ByVal value As String)
MyBase.Item("status") = value
End Set
End Property
<ConfigurationProperty("message", DefaultValue:="", IsKey:=False, IsRequired:=False)> _
Public Property Message() As String
Get
Return CType(MyBase.Item("message"), String)
End Get
Set(ByVal value As String)
MyBase.Item("message") = value
End Set
End Property
End Class
End Namespace
顶层不需要 DeviceConfig 属性。您要做需要做的是为您的
ConfigurationElementCollection
设备添加一个属性。我还将您的Devices
类重命名为稍微不那么模糊的名称,例如DeviceElementCollection
。试试这个:然后,在
DeviceElementCollection
的定义中,如果不添加以下内容,可能会遇到问题:我为类似问题写了一个很长的答案(抱歉,在 C# 中)此处。
更新 - 如何在代码中使用
The DeviceConfig property is not needed at the top level. What you do need to do is add a property for your
ConfigurationElementCollection
devices. I would also rename yourDevices
class something a little less ambiguous, say,DeviceElementCollection
. Try this:Then, in your definition for
DeviceElementCollection
, you may have problems if you don't add the following:I wrote up a pretty long answer to a similar question (sorry, in C#) here.
Update - how to use in code