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Adding a Section In Configuration File

 
 
Water Cooler v2
Guest
Posts: n/a
 
      25th Aug 2006
I know that we can add a single name value entry in app.config or
web.config in the configuration/configSettings/appSettings section like
so:

<add key="key" value="value" />

Question: I want to add a dictionary of name-value pairs. In other
words, instead of a single name-value, I want to add a name-value
collection in there. I could do this:

<add key="key1" value="value1" />
<add key="key2" value="value2" />
<add key="key3" value="value3" />

but that would mix it up with other members that I do not intend to
have as a part of this collection. Is there a way I can add a
collection itself? How? And how would I then access it?

 
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=?Utf-8?B?SmFyZWQ=?=
Guest
Posts: n/a
 
      25th Aug 2006
Water Cooler,
You can create your own configuration section and use one of the staic
methods in the System.Configuration namespace to retrieve the information.
Attached is a simple example. Also lookup configSection element and
IConfigurationSectionHandler interface for additional information.

// If you are using 2.0 make the compiler recommend change to the obsolete
GetConfig("MySection") method call.

/* USE */

private static void ConfigExample()
{
System.Collections.Specialized.StringDictionary dictionary =
(System.Collections.Specialized.StringDictionary)
System.Configuration.ConfigurationSettings.GetConfig("MySection");
IEnumerator iterator = dictionary.GetEnumerator();
DictionaryEntry entry;
while (iterator.MoveNext())
{
entry = (DictionaryEntry)iterator.Current;
Console.WriteLine("{0} = {1}", entry.Key, entry.Value);
}
}



/* APP.CONFIG OR WEB.CONFIG */

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

<configSections>
<section name="MySection" type="MyNamespace.MySectionHandler,
MyAssemblyName"/>
</configSections>

<MySection>
<add key="key1" value="value1" />
<add key="key2" value="value2" />
<add key="key3" value="value3" />
</MySection>

</configuration>

/* IConfigurationSectionHandler Implementation */

namespace MyNamespace
{
public class MySectionHandler :
System.Configuration.IConfigurationSectionHandler
{
#region IConfigurationSectionHandler Members

public object Create(object parent, object configContext, XmlNode
section)
{
System.Collections.Specialized.StringDictionary mySection =
new System.Collections.Specialized.StringDictionary();
if (section == null || section.ChildNodes.Count == 0)
{
return mySection;
}
foreach (XmlNode node in section.ChildNodes)
{
mySection.Add(node.Attributes[0].Value,
node.Attributes[1].Value);
}
return mySection;
}

#endregion
}
}

"Water Cooler v2" wrote:

> I know that we can add a single name value entry in app.config or
> web.config in the configuration/configSettings/appSettings section like
> so:
>
> <add key="key" value="value" />
>
> Question: I want to add a dictionary of name-value pairs. In other
> words, instead of a single name-value, I want to add a name-value
> collection in there. I could do this:
>
> <add key="key1" value="value1" />
> <add key="key2" value="value2" />
> <add key="key3" value="value3" />
>
> but that would mix it up with other members that I do not intend to
> have as a part of this collection. Is there a way I can add a
> collection itself? How? And how would I then access it?
>
>

 
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Sathyaish
Guest
Posts: n/a
 
      25th Aug 2006
Thanks, Jared. Implementing the IConfigurationSectionHandler.Create()
is the sad part. It is like Microsoft saying, "Look! It is very easy.
Just do everything yourself and we'll give you the chance of putting
your own sweet, custom, nice-looking sections in our App.Config. And
that way, you get total control over your configuration file. Just
remember to do all the legwork."

But again, how would the framework know what my object looks like.


Thanks.

 
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=?Utf-8?B?SmFyZWQ=?=
Guest
Posts: n/a
 
      26th Aug 2006
What do you mean by "how would the framework know what my object looks like"?

You are in total control; for instance, you can create a strongly typed
object that represents your configuration section. Make sure you provide
support for serialization and just deserialize it into your type. Return in
the Create method.
Then all you need to do is provide a property accessor (possibly through a
singleton instance) in your library/app and your job is done. Now you have a
strongly typed representation of your object for all to use.

I think the IConfigurationHandler is a wonderful way to provide the kind of
extensibility you are requiring. To provide the same results in you own code
you would expect to write more code, leaving the chance that more can go
wrong. I.E. You are not concerned with IO, creating the document, and/or
xpathing to the section. If you implement your object using the
xmlserializer then you have about 10 lines of code to write, all of which are
native framework functions. You can't really count the xml in the config
file, which would need to be done regardless of the option you choose.
Finally, the property accessor, this should be something you are already used
to, its very poor design to allow consumers to access your member data
directly.

The following example should illustrate my point. Also, one of the big
advantages of this is that it allows you to make your modifications in a
single place – the class that you are extending (I’m not referring to the
consumers of the class, that is inevitable).

I’m curious to see what your (and others) thoughts are on this subject.

Jared

private static void ConfigExample()
{
MyNamespace.MyCustomObject customObject =
MyNamespace.MyCustomObject.Instance;

foreach (MyNamespace.MyCustomObject.MyItem item in customObject.Items)
{
Console.WriteLine("{0} = {1}", item.Key, item.Value);
}
}


namespace MyNamespace
{
public class MySectionHandler :
System.Configuration.IConfigurationSectionHandler
{
#region IConfigurationSectionHandler Members

public object Create(object parent, object configContext, XmlNode
section)
{
System.IO.MemoryStream mem = new MemoryStream();
XmlTextWriter writer = new XmlTextWriter(mem, null);
XmlSerializer ser = new XmlSerializer(typeof(MyCustomObject));
section.WriteTo(writer);
writer.Flush();
mem.Seek(0, SeekOrigin.Begin);
MyCustomObject customObject = ser.Deserialize(mem) as
MyCustomObject;
writer.Close();
return customObject;
}

#endregion
}
}

namespace MyNamespace
{
[Serializable(), XmlRoot("MySection")]
public sealed class MyCustomObject
{
static MyCustomObject()
{
lockObject = new object();
}
private MyCustomObject()
{
_items = (MyItem[])Array.CreateInstance(typeof(MyItem), 0);
_items.Initialize();
}

private MyItem[] _items;
private static MyCustomObject _instance;
private static readonly object lockObject;

public static MyCustomObject Instance
{
get
{
lock (lockObject)
{
try
{
_instance =
System.Configuration.ConfigurationSettings.GetConfig("MySection") as
MyCustomObject;
}
catch (Exception){}
if (_instance == null)
{
_instance = new MyCustomObject();
}
return _instance;
}
}
}

[XmlElement("add")]
public MyItem[] Items
{
get { return _items; }
set { _items = value; }
}

[Serializable()]
public class MyItem
{
public MyItem()
{
Key = string.Empty;
Value = string.Empty;
}
private string _key;
private string _value;
[XmlAttribute("key")]
public string Key
{
get { return _key; }
set
{
if (value == null)
{
_key = string.Empty;
return;
}
_key = value;
}
}
[XmlAttribute("value")]
public string Value
{
get { return _value; }
set
{
if (value == null)
{
_value = string.Empty;
return;
}
_value = value;
}
}
}

}
}

"Sathyaish" wrote:

> Thanks, Jared. Implementing the IConfigurationSectionHandler.Create()
> is the sad part. It is like Microsoft saying, "Look! It is very easy.
> Just do everything yourself and we'll give you the chance of putting
> your own sweet, custom, nice-looking sections in our App.Config. And
> that way, you get total control over your configuration file. Just
> remember to do all the legwork."
>
> But again, how would the framework know what my object looks like.
>
>
> Thanks.
>
>

 
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Jay B. Harlow [MVP - Outlook]
Guest
Posts: n/a
 
      26th Aug 2006
| I think the IConfigurationHandler is a wonderful way to provide the kind
of
| extensibility you are requiring.
Using IConfigurationHandler is a "wonderful" way of doing it, if you like
flexibility at the expense of writing lots & lots of code. (as compared to
the .NET 2.0 way of doing it).

You should check out what's new in .NET 2.0 System.Configuration namespace!

http://msdn2.microsoft.com/en-us/lib...iguration.aspx

You can have very rich & type safe configuration class simply by inheriting
from ConfigurationElement, ConfigurationSection or
ConfigurationSectionGroup. Adding some properties with attributes; the
attributes control the name of the element as well as validation...


Something like:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="widgets" type="Test.Configuration.WidgetsSection, Test"
/>
</configSections>
<widgets>
<add name="Widget1" type="Test.Widget, Test" />
<add name="Widget2" type="Test.Widget, Test" />
</widgets>
</configuration>


Option Strict On
Option Explicit On

' references the System.Configuration assembly

Imports System.Configuration
Imports System.ComponentModel

Namespace Configuration

Public Class WidgetsSection
Inherits ConfigurationSection

Private Const WidgetsElementName As String = ""

<ConfigurationProperty(WidgetsElementName,
IsDefaultCollection:=True)> _
<ConfigurationCollection(GetType(WidgetSettings))> _
Public ReadOnly Property Widgets() As WidgetSettingsCollection
Get
Return DirectCast(MyBase.Item(WidgetsElementName),
WidgetSettingsCollection)
End Get
End Property

End Class

Public NotInheritable Class WidgetSettings
Inherits ConfigurationElement

Private Const NameProperty As String = "name"
Private Const TypeProperty As String = "type"

Public Sub New()
End Sub

Public Sub New(ByVal elementName As String)
Name = elementName
End Sub

<ConfigurationProperty(NameProperty, IsKey:=True, IsRequired:=True,
DefaultValue:="Name")> _
<StringValidator(MinLength:=1)> _
Public Property Name() As String
Get
Return DirectCast(Me(NameProperty), String)
End Get
Set(ByVal value As String)
Me(NameProperty) = value
End Set
End Property

<ConfigurationProperty(TypeProperty, IsRequired:=True)> _
<TypeConverter(GetType(TypeNameConverter))> _
<SubclassTypeValidator(GetType(Widget))> _
Public Property Type() As Type
Get
Return DirectCast(Me(TypeProperty), Type)
End Get
Set(ByVal value As Type)
Me(TypeProperty) = value
End Set
End Property

End Class

Public NotInheritable Class WidgetSettingsCollection
Inherits ConfigurationElementCollection(Of WidgetSettings)

Public Sub New()
MyBase.New(StringComparer.CurrentCultureIgnoreCase)
End Sub

Protected Overloads Overrides Function CreateNewElement() As
ConfigurationElement
Return New WidgetSettings()
End Function

Protected Overrides Function CreateNewElement(ByVal elementName As
String) As ConfigurationElement
Return New WidgetSettings(elementName)
End Function

Protected Overrides Function GetElementKey(ByVal element As
ConfigurationElement) As Object
Return DirectCast(element, WidgetSettings).Name
End Function

End Class

Public MustInherit Class ConfigurationElementCollection(Of T As
ConfigurationElement)
Inherits ConfigurationElementCollection

Protected Sub New()

End Sub

Protected Sub New(ByVal comparer As IComparer)
MyBase.New(comparer)
End Sub

Default Public Overloads Property Item(ByVal index As Integer) As T
Get
Return DirectCast(Me(index), T)
End Get
Set(ByVal value As T)
Me(index) = value
End Set
End Property

Default Public Overloads Property Item(ByVal name As String) As T
Get
Return DirectCast(Me(name), T)
End Get
Set(ByVal value As T)
Me(name) = value
End Set
End Property

Public Sub Add(ByVal settings As T)
BaseAdd(settings)
End Sub

Public Sub Clear()
BaseClear()
End Sub

Public Sub Remove(ByVal name As String)
BaseRemove(name)
End Sub

Public Sub Remove(ByVal settings As T)
BaseRemove(GetElementKey(settings))
End Sub

Public Sub RemoveAt(ByVal index As Integer)
BaseRemoveAt(index)
End Sub

Public Function IndexOf(ByVal settings As T) As Integer
Return BaseIndexOf(settings)
End Function

Protected Overrides Sub BaseAdd(ByVal index As Integer, ByVal
element As ConfigurationElement)
MyBase.BaseAdd(index, element)
End Sub

End Class

End Namespace

FWIW: ConfigurationElementCollection(Of T) class encapsulates the common
ConfigurationElementCollection logic in a typesafe type.


To really see the .NET 2.0 configuration in action check out the source to
Enterprise Library 2.0.

http://www.gotdotnet.com/codegallery...2-91be63527327


--
Hope this helps
Jay B. Harlow [MVP - Outlook]
..NET Application Architect, Enthusiast, & Evangelist
T.S. Bradley - http://www.tsbradley.net


"Jared" <(E-Mail Removed)> wrote in message
news:F3CC197E-993A-4888-A594-(E-Mail Removed)...
| What do you mean by "how would the framework know what my object looks
like"?
|
| You are in total control; for instance, you can create a strongly typed
| object that represents your configuration section. Make sure you provide
| support for serialization and just deserialize it into your type. Return
in
| the Create method.
| Then all you need to do is provide a property accessor (possibly through a
| singleton instance) in your library/app and your job is done. Now you
have a
| strongly typed representation of your object for all to use.
|
| I think the IConfigurationHandler is a wonderful way to provide the kind
of
| extensibility you are requiring. To provide the same results in you own
code
| you would expect to write more code, leaving the chance that more can go
| wrong. I.E. You are not concerned with IO, creating the document, and/or
| xpathing to the section. If you implement your object using the
| xmlserializer then you have about 10 lines of code to write, all of which
are
| native framework functions. You can't really count the xml in the config
| file, which would need to be done regardless of the option you choose.
| Finally, the property accessor, this should be something you are already
used
| to, its very poor design to allow consumers to access your member data
| directly.
|
| The following example should illustrate my point. Also, one of the big
| advantages of this is that it allows you to make your modifications in a
| single place - the class that you are extending (I'm not referring to the
| consumers of the class, that is inevitable).
|
| I'm curious to see what your (and others) thoughts are on this subject.
|
| Jared
|
| private static void ConfigExample()
| {
| MyNamespace.MyCustomObject customObject =
| MyNamespace.MyCustomObject.Instance;
|
| foreach (MyNamespace.MyCustomObject.MyItem item in customObject.Items)
| {
| Console.WriteLine("{0} = {1}", item.Key, item.Value);
| }
| }
|
|
| namespace MyNamespace
| {
| public class MySectionHandler :
| System.Configuration.IConfigurationSectionHandler
| {
| #region IConfigurationSectionHandler Members
|
| public object Create(object parent, object configContext, XmlNode
| section)
| {
| System.IO.MemoryStream mem = new MemoryStream();
| XmlTextWriter writer = new XmlTextWriter(mem, null);
| XmlSerializer ser = new XmlSerializer(typeof(MyCustomObject));
| section.WriteTo(writer);
| writer.Flush();
| mem.Seek(0, SeekOrigin.Begin);
| MyCustomObject customObject = ser.Deserialize(mem) as
| MyCustomObject;
| writer.Close();
| return customObject;
| }
|
| #endregion
| }
| }
|
| namespace MyNamespace
| {
| [Serializable(), XmlRoot("MySection")]
| public sealed class MyCustomObject
| {
| static MyCustomObject()
| {
| lockObject = new object();
| }
| private MyCustomObject()
| {
| _items = (MyItem[])Array.CreateInstance(typeof(MyItem), 0);
| _items.Initialize();
| }
|
| private MyItem[] _items;
| private static MyCustomObject _instance;
| private static readonly object lockObject;
|
| public static MyCustomObject Instance
| {
| get
| {
| lock (lockObject)
| {
| try
| {
| _instance =
| System.Configuration.ConfigurationSettings.GetConfig("MySection") as
| MyCustomObject;
| }
| catch (Exception){}
| if (_instance == null)
| {
| _instance = new MyCustomObject();
| }
| return _instance;
| }
| }
| }
|
| [XmlElement("add")]
| public MyItem[] Items
| {
| get { return _items; }
| set { _items = value; }
| }
|
| [Serializable()]
| public class MyItem
| {
| public MyItem()
| {
| Key = string.Empty;
| Value = string.Empty;
| }
| private string _key;
| private string _value;
| [XmlAttribute("key")]
| public string Key
| {
| get { return _key; }
| set
| {
| if (value == null)
| {
| _key = string.Empty;
| return;
| }
| _key = value;
| }
| }
| [XmlAttribute("value")]
| public string Value
| {
| get { return _value; }
| set
| {
| if (value == null)
| {
| _value = string.Empty;
| return;
| }
| _value = value;
| }
| }
| }
|
| }
| }
|
| "Sathyaish" wrote:
|
| > Thanks, Jared. Implementing the IConfigurationSectionHandler.Create()
| > is the sad part. It is like Microsoft saying, "Look! It is very easy.
| > Just do everything yourself and we'll give you the chance of putting
| > your own sweet, custom, nice-looking sections in our App.Config. And
| > that way, you get total control over your configuration file. Just
| > remember to do all the legwork."
| >
| > But again, how would the framework know what my object looks like.
| >
| >
| > Thanks.
| >
| >


 
Reply With Quote
 
=?Utf-8?B?SmFyZWQ=?=
Guest
Posts: n/a
 
      27th Aug 2006
Jay,
Thanks! I wasn't aware of all the changes to the System.Configuration
namespace.
Also, I really appreciate the fact that you took the time to provide an
example, I wish more did this.

"Using IConfigurationHandler is a "wonderful" way of doing it, if you like
flexibility at the expense of writing lots & lots of code. (as compared to
the .NET 2.0 way of doing it)."

I used about 20 lines less in my example ;-) Seriously though, I can
definitely see the advantages. Thanks for your reply.

Jared


"Jay B. Harlow [MVP - Outlook]" wrote:

> | I think the IConfigurationHandler is a wonderful way to provide the kind
> of
> | extensibility you are requiring.
> Using IConfigurationHandler is a "wonderful" way of doing it, if you like
> flexibility at the expense of writing lots & lots of code. (as compared to
> the .NET 2.0 way of doing it).
>
> You should check out what's new in .NET 2.0 System.Configuration namespace!
>
> http://msdn2.microsoft.com/en-us/lib...iguration.aspx
>
> You can have very rich & type safe configuration class simply by inheriting
> from ConfigurationElement, ConfigurationSection or
> ConfigurationSectionGroup. Adding some properties with attributes; the
> attributes control the name of the element as well as validation...
>
>
> Something like:
>
> <?xml version="1.0" encoding="utf-8" ?>
> <configuration>
> <configSections>
> <section name="widgets" type="Test.Configuration.WidgetsSection, Test"
> />
> </configSections>
> <widgets>
> <add name="Widget1" type="Test.Widget, Test" />
> <add name="Widget2" type="Test.Widget, Test" />
> </widgets>
> </configuration>
>
>
> Option Strict On
> Option Explicit On
>
> ' references the System.Configuration assembly
>
> Imports System.Configuration
> Imports System.ComponentModel
>
> Namespace Configuration
>
> Public Class WidgetsSection
> Inherits ConfigurationSection
>
> Private Const WidgetsElementName As String = ""
>
> <ConfigurationProperty(WidgetsElementName,
> IsDefaultCollection:=True)> _
> <ConfigurationCollection(GetType(WidgetSettings))> _
> Public ReadOnly Property Widgets() As WidgetSettingsCollection
> Get
> Return DirectCast(MyBase.Item(WidgetsElementName),
> WidgetSettingsCollection)
> End Get
> End Property
>
> End Class
>
> Public NotInheritable Class WidgetSettings
> Inherits ConfigurationElement
>
> Private Const NameProperty As String = "name"
> Private Const TypeProperty As String = "type"
>
> Public Sub New()
> End Sub
>
> Public Sub New(ByVal elementName As String)
> Name = elementName
> End Sub
>
> <ConfigurationProperty(NameProperty, IsKey:=True, IsRequired:=True,
> DefaultValue:="Name")> _
> <StringValidator(MinLength:=1)> _
> Public Property Name() As String
> Get
> Return DirectCast(Me(NameProperty), String)
> End Get
> Set(ByVal value As String)
> Me(NameProperty) = value
> End Set
> End Property
>
> <ConfigurationProperty(TypeProperty, IsRequired:=True)> _
> <TypeConverter(GetType(TypeNameConverter))> _
> <SubclassTypeValidator(GetType(Widget))> _
> Public Property Type() As Type
> Get
> Return DirectCast(Me(TypeProperty), Type)
> End Get
> Set(ByVal value As Type)
> Me(TypeProperty) = value
> End Set
> End Property
>
> End Class
>
> Public NotInheritable Class WidgetSettingsCollection
> Inherits ConfigurationElementCollection(Of WidgetSettings)
>
> Public Sub New()
> MyBase.New(StringComparer.CurrentCultureIgnoreCase)
> End Sub
>
> Protected Overloads Overrides Function CreateNewElement() As
> ConfigurationElement
> Return New WidgetSettings()
> End Function
>
> Protected Overrides Function CreateNewElement(ByVal elementName As
> String) As ConfigurationElement
> Return New WidgetSettings(elementName)
> End Function
>
> Protected Overrides Function GetElementKey(ByVal element As
> ConfigurationElement) As Object
> Return DirectCast(element, WidgetSettings).Name
> End Function
>
> End Class
>
> Public MustInherit Class ConfigurationElementCollection(Of T As
> ConfigurationElement)
> Inherits ConfigurationElementCollection
>
> Protected Sub New()
>
> End Sub
>
> Protected Sub New(ByVal comparer As IComparer)
> MyBase.New(comparer)
> End Sub
>
> Default Public Overloads Property Item(ByVal index As Integer) As T
> Get
> Return DirectCast(Me(index), T)
> End Get
> Set(ByVal value As T)
> Me(index) = value
> End Set
> End Property
>
> Default Public Overloads Property Item(ByVal name As String) As T
> Get
> Return DirectCast(Me(name), T)
> End Get
> Set(ByVal value As T)
> Me(name) = value
> End Set
> End Property
>
> Public Sub Add(ByVal settings As T)
> BaseAdd(settings)
> End Sub
>
> Public Sub Clear()
> BaseClear()
> End Sub
>
> Public Sub Remove(ByVal name As String)
> BaseRemove(name)
> End Sub
>
> Public Sub Remove(ByVal settings As T)
> BaseRemove(GetElementKey(settings))
> End Sub
>
> Public Sub RemoveAt(ByVal index As Integer)
> BaseRemoveAt(index)
> End Sub
>
> Public Function IndexOf(ByVal settings As T) As Integer
> Return BaseIndexOf(settings)
> End Function
>
> Protected Overrides Sub BaseAdd(ByVal index As Integer, ByVal
> element As ConfigurationElement)
> MyBase.BaseAdd(index, element)
> End Sub
>
> End Class
>
> End Namespace
>
> FWIW: ConfigurationElementCollection(Of T) class encapsulates the common
> ConfigurationElementCollection logic in a typesafe type.
>
>
> To really see the .NET 2.0 configuration in action check out the source to
> Enterprise Library 2.0.
>
> http://www.gotdotnet.com/codegallery...2-91be63527327
>
>
> --
> Hope this helps
> Jay B. Harlow [MVP - Outlook]
> ..NET Application Architect, Enthusiast, & Evangelist
> T.S. Bradley - http://www.tsbradley.net
>
>
> "Jared" <(E-Mail Removed)> wrote in message
> news:F3CC197E-993A-4888-A594-(E-Mail Removed)...
> | What do you mean by "how would the framework know what my object looks
> like"?
> |
> | You are in total control; for instance, you can create a strongly typed
> | object that represents your configuration section. Make sure you provide
> | support for serialization and just deserialize it into your type. Return
> in
> | the Create method.
> | Then all you need to do is provide a property accessor (possibly through a
> | singleton instance) in your library/app and your job is done. Now you
> have a
> | strongly typed representation of your object for all to use.
> |
> | I think the IConfigurationHandler is a wonderful way to provide the kind
> of
> | extensibility you are requiring. To provide the same results in you own
> code
> | you would expect to write more code, leaving the chance that more can go
> | wrong. I.E. You are not concerned with IO, creating the document, and/or
> | xpathing to the section. If you implement your object using the
> | xmlserializer then you have about 10 lines of code to write, all of which
> are
> | native framework functions. You can't really count the xml in the config
> | file, which would need to be done regardless of the option you choose.
> | Finally, the property accessor, this should be something you are already
> used
> | to, its very poor design to allow consumers to access your member data
> | directly.
> |
> | The following example should illustrate my point. Also, one of the big
> | advantages of this is that it allows you to make your modifications in a
> | single place - the class that you are extending (I'm not referring to the
> | consumers of the class, that is inevitable).
> |
> | I'm curious to see what your (and others) thoughts are on this subject.
> |
> | Jared
> |
> | private static void ConfigExample()
> | {
> | MyNamespace.MyCustomObject customObject =
> | MyNamespace.MyCustomObject.Instance;
> |
> | foreach (MyNamespace.MyCustomObject.MyItem item in customObject.Items)
> | {
> | Console.WriteLine("{0} = {1}", item.Key, item.Value);
> | }
> | }
> |
> |
> | namespace MyNamespace
> | {
> | public class MySectionHandler :
> | System.Configuration.IConfigurationSectionHandler
> | {
> | #region IConfigurationSectionHandler Members
> |
> | public object Create(object parent, object configContext, XmlNode
> | section)
> | {
> | System.IO.MemoryStream mem = new MemoryStream();
> | XmlTextWriter writer = new XmlTextWriter(mem, null);
> | XmlSerializer ser = new XmlSerializer(typeof(MyCustomObject));
> | section.WriteTo(writer);
> | writer.Flush();
> | mem.Seek(0, SeekOrigin.Begin);
> | MyCustomObject customObject = ser.Deserialize(mem) as
> | MyCustomObject;
> | writer.Close();
> | return customObject;
> | }
> |
> | #endregion
> | }
> | }
> |
> | namespace MyNamespace
> | {
> | [Serializable(), XmlRoot("MySection")]
> | public sealed class MyCustomObject
> | {
> | static MyCustomObject()
> | {
> | lockObject = new object();
> | }
> | private MyCustomObject()
> | {
> | _items = (MyItem[])Array.CreateInstance(typeof(MyItem), 0);
> | _items.Initialize();
> | }
> |
> | private MyItem[] _items;
> | private static MyCustomObject _instance;
> | private static readonly object lockObject;
> |
> | public static MyCustomObject Instance

 
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