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ConfigurationSectionGroupCollection Class

Definition

Represents a collection of ConfigurationSectionGroup objects.

public ref class ConfigurationSectionGroupCollection sealed : System::Collections::Specialized::NameObjectCollectionBase
public sealed class ConfigurationSectionGroupCollection : System.Collections.Specialized.NameObjectCollectionBase
[System.Serializable]
public sealed class ConfigurationSectionGroupCollection : System.Collections.Specialized.NameObjectCollectionBase
type ConfigurationSectionGroupCollection = class
    inherit NameObjectCollectionBase
[<System.Serializable>]
type ConfigurationSectionGroupCollection = class
    inherit NameObjectCollectionBase
Public NotInheritable Class ConfigurationSectionGroupCollection
Inherits NameObjectCollectionBase
Inheritance
ConfigurationSectionGroupCollection
Attributes

Examples

The following code example shows how to use the ConfigurationSectionGroupCollection class.

using System;
using System.Configuration;
using System.Collections;

namespace Samples.Config
{

    // Define a custom section.
    public sealed class CustomSection :
        ConfigurationSection
    {

        public CustomSection()
        { }

        [ConfigurationProperty("fileName", DefaultValue = "default.txt",
            IsRequired = true, IsKey = false)]
        [StringValidator(InvalidCharacters = " ~!@#$%^&*()[]{}/;'\"|\\",
            MinLength = 1, MaxLength = 60)]
        public string FileName
        {
            get
            {
                return (string)this["fileName"];
            }
            set
            {
                this["fileName"] = value;
            }
        }
      
        [ConfigurationProperty("maxUsers", DefaultValue = (long)10000,
            IsRequired = false)]
        [LongValidator(MinValue = 1, MaxValue = 10000000,
            ExcludeRange = false)]
        public long MaxUsers
        {
            get
            {
                return (long)this["maxUsers"];
            }
            set
            {
                this["maxUsers"] = value;
            }
        }
       
        [ConfigurationProperty("maxIdleTime",
            DefaultValue = "0:10:0",
            IsRequired = false)]
        [TimeSpanValidator(MinValueString = "0:0:30",
            MaxValueString = "5:00:0",
            ExcludeRange = false)]
        public TimeSpan MaxIdleTime
        {
            get
            {
                return (TimeSpan)this["maxIdleTime"];
            }
            set
            {
                this["maxIdleTime"] = value;
            }
        }
    }

    // Define a custom section group.
    public sealed class CustomSectionGroup :
        ConfigurationSectionGroup
    {

        public CustomSectionGroup()
        {
        }

        public CustomSection Custom
        {
            get { return (CustomSection) 
                Sections.Get("CustomSection");}
        }
    }

    class UsingCustomSectionGroupCollection
    {

        // Create a custom section group.
        static void CreateSectionGroup()
        {
            try
            {

                CustomSectionGroup customSectionGroup;
     
                // Get the current configuration file.
                System.Configuration.Configuration config =
                        ConfigurationManager.OpenExeConfiguration(
                        ConfigurationUserLevel.None);

                // Create the section group entry  
                // in the <configSections> and the 
                // related target section in <configuration>.
                if (config.SectionGroups["CustomGroup"] == null)
                {
                    customSectionGroup = new CustomSectionGroup();
                    config.SectionGroups.Add("CustomGroup", 
                        customSectionGroup);
                    customSectionGroup.ForceDeclaration(true);
                    config.Save(ConfigurationSaveMode.Full);
                }
            }
            catch (ConfigurationErrorsException err)
            {
                Console.WriteLine(err.ToString());
            }
        }

        // Get the collection group keys i.e.,
        // the group names.
        //static void GetAllKeys()
        //{

        //    try
        //    {
        //        System.Configuration.Configuration config =
        //        ConfigurationManager.OpenExeConfiguration(
        //        ConfigurationUserLevel.None);

        //        ConfigurationSectionGroupCollection groups =
        //            config.SectionGroups;
        //        groups.
        //        foreach (string name in groups.AllKeys)
        //        {
        //            Console.WriteLine(
        //             "Key value: {0}", name);
        //        }

        //    }
        //    catch (ConfigurationErrorsException err)
        //    {
        //        Console.WriteLine(err.ToString());
        //    }
        //}

        static void Clear()
        {

            try
            {
                System.Configuration.Configuration config =
                ConfigurationManager.OpenExeConfiguration(
                ConfigurationUserLevel.None);

                config.SectionGroups.Clear();

                config.Save(ConfigurationSaveMode.Full);
            }
            catch (ConfigurationErrorsException err)
            {
                Console.WriteLine(err.ToString());
            }
        }

        static void GetGroup()
        {

            try
            {
                System.Configuration.Configuration config =
                ConfigurationManager.OpenExeConfiguration(
                ConfigurationUserLevel.None);

                ConfigurationSectionGroup customGroup =
                    config.SectionGroups.Get("CustomGroup");

                if (customGroup == null)
                    Console.WriteLine(
                        "Failed to load CustomSection.");
                else
                {
                    // Display section information
                    Console.WriteLine("Section group name:       {0}",
                        customGroup.SectionGroupName);
                    Console.WriteLine("Name:       {0}",
                        customGroup.Name);
                    Console.WriteLine("Type:   {0}",
                        customGroup.Type);
                }
            }
            catch (ConfigurationErrorsException err)
            {
                Console.WriteLine(err.ToString());
            }
        }

        static void GetEnumerator()
        {

            try
            {
                System.Configuration.Configuration config =
                ConfigurationManager.OpenExeConfiguration(
                ConfigurationUserLevel.None);

                ConfigurationSectionGroupCollection groups =
                    config.SectionGroups;

                IEnumerator groupEnum =
                    groups.GetEnumerator();

                int i = 0;
                while (groupEnum.MoveNext())
                {
                    string groupName = groups.GetKey(i);
                    Console.WriteLine(
                        "Group name: {0}", groupName);
                    i += 1;
                }
            }
            catch (ConfigurationErrorsException err)
            {
                Console.WriteLine(err.ToString());
            }
        }

        // Get the collection keys i.e., the
        // group names.
        static void GetKeys()
        {

            try
            {
                System.Configuration.Configuration config =
                ConfigurationManager.OpenExeConfiguration(
                ConfigurationUserLevel.None);

                ConfigurationSectionGroupCollection groups =
                    config.SectionGroups;

                foreach (string key in groups.Keys)
                {

                    Console.WriteLine(
                     "Key value: {0}", key);
                }
            }
            catch (ConfigurationErrorsException err)
            {
                Console.WriteLine(err.ToString());
            }
        }


        static void GetItems()
        {

            try
            {
                System.Configuration.Configuration config =
                 ConfigurationManager.OpenExeConfiguration(
                 ConfigurationUserLevel.None);

                ConfigurationSectionGroupCollection groups =
                    config.SectionGroups;

                ConfigurationSectionGroup group1 =
                    groups.Get("system.net");

                ConfigurationSectionGroup group2 =
                groups.Get("system.web");

                Console.WriteLine(
                     "Group1: {0}", group1.Name);

                Console.WriteLine(
                    "Group2: {0}", group2.Name);
            }
            catch (ConfigurationErrorsException err)
            {
                Console.WriteLine(err.ToString());
            }
        }


        static void Remove()
        {

            try
            {
 
                System.Configuration.Configuration config =
                    ConfigurationManager.OpenExeConfiguration(
                   ConfigurationUserLevel.None);

                ConfigurationSectionGroup customGroup =
                    config.SectionGroups.Get("CustomGroup");

                if (customGroup != null)
                {
                    config.SectionGroups.Remove("CustomGroup");
                    config.Save(ConfigurationSaveMode.Full);
                }
                else
                    Console.WriteLine(
                        "CustomGroup does not exists.");
            }
            catch (ConfigurationErrorsException err)
            {
                Console.WriteLine(err.ToString());
            }
        }

        // Add custom section to the group.
        static void AddSection()
        {
            try
            {

                CustomSection customSection;

                // Get the current configuration file.
                System.Configuration.Configuration config =
                        ConfigurationManager.OpenExeConfiguration(
                        ConfigurationUserLevel.None);

                // Create the section entry  
                // in the <configSections> and the 
                // related target section in <configuration>.
                ConfigurationSectionGroup customGroup;
                customGroup = config.SectionGroups.Get("CustomGroup");

                if (customGroup.Sections.Get("CustomSection") == null)
                {
                    customSection = new CustomSection();
                    customGroup.Sections.Add("CustomSection",
                        customSection);
                    customSection.SectionInformation.ForceSave = true;
                    config.Save(ConfigurationSaveMode.Full);
                }
            }
            catch (ConfigurationErrorsException err)
            {
                Console.WriteLine(err.ToString());
            }
        }

        // Exercise the collection.
        // Uncomment the function you want to exercise.
        // Start with CreateSectionGroup().
        static void Main(string[] args)
        {
            CreateSectionGroup();
            AddSection();
            // GetAllKeys();
            // GetGroup();
            
            // GetEnumerator();
            
            // GetKeys();
            
            // GetItems();

            // Remove();
            // Clear();
        }
    }
}
Imports System.Configuration
Imports System.Collections


' Define a custom section.
NotInheritable Public Class CustomSection
   Inherits ConfigurationSection
   
   
   Public Sub New()
   End Sub
   
    <ConfigurationProperty("fileName", _
    DefaultValue:="default.txt", _
    IsRequired:=True, _
    IsKey:=False), _
    StringValidator( _
    InvalidCharacters:=" ~!@#$%^&*()[]{}/;'""|\", _
    MinLength:=1, _
    MaxLength:=60)> _
    Public Property FileName() As String
        Get
            Return CStr(Me("fileName"))
        End Get
        Set(ByVal value As String)
            Me("fileName") = value
        End Set
    End Property

    <ConfigurationProperty("maxUsers", _
    DefaultValue:=10000, _
    IsRequired:=False), _
    LongValidator(MinValue:=1, _
    MaxValue:=10000000, _
    ExcludeRange:=False)> _
   Public Property MaxUsers() As Long
        Get
            Return Fix(Me("maxUsers"))
        End Get
        Set(ByVal value As Long)
            Me("maxUsers") = value
        End Set
    End Property

    <ConfigurationProperty("maxIdleTime", _
    DefaultValue:="0:10:0", _
    IsRequired:=False), _
    TimeSpanValidator(MinValueString:="0:0:30", _
    MaxValueString:="5:00:0", _
    ExcludeRange:=False)> _
    Public Property MaxIdleTime() As TimeSpan
        Get
            Return CType(Me("maxIdleTime"), TimeSpan)
        End Get
        Set(ByVal value As TimeSpan)
            Me("maxIdleTime") = value
        End Set
    End Property

End Class

' Define a custom section group.

NotInheritable Public Class CustomSectionGroup
   Inherits ConfigurationSectionGroup
   
   
   Public Sub New()
   End Sub

   
   Public ReadOnly Property Custom() As CustomSection
      Get
            Return CType(Sections.Get("CustomSection"), _
            CustomSection)
      End Get
    End Property

End Class


Class UsingCustomSectionGroupCollection

   
   ' Create a custom section group.
   Shared Sub CreateSectionGroup()
      Try
         
         Dim customSectionGroup As CustomSectionGroup
         
         ' Get the current configuration file.
            Dim config As System.Configuration.Configuration = _
            ConfigurationManager.OpenExeConfiguration( _
            ConfigurationUserLevel.None)
         
         ' Create the section group entry  
         ' in the <configSections> and the 
         ' related target section in <configuration>.
         If config.SectionGroups("CustomGroup") Is Nothing Then
            customSectionGroup = New CustomSectionGroup()
            config.SectionGroups.Add("CustomGroup", customSectionGroup)
            customSectionGroup.ForceDeclaration(True)
            config.Save(ConfigurationSaveMode.Full)
         End If
      
      Catch err As ConfigurationErrorsException
         Console.WriteLine(err.ToString())
      End Try
   End Sub
    
   
   ' Get the collection group keys i.e.,
   ' the group names.
    'Shared Sub GetAllKeys()

    '   Try
    '         Dim config _
    '         As System.Configuration.Configuration = _
    '         ConfigurationManager.OpenExeConfiguration( _
    '         ConfigurationUserLevel.None)

    '         Dim groups _
    '         As ConfigurationSectionGroupCollection = _
    '         config.SectionGroups

    '      Dim name As String
    '      For Each name In  groups.AllKeys
    '         Console.WriteLine("Key value: {0}", name)
    '      Next name


    '   Catch err As ConfigurationErrorsException
    '      Console.WriteLine(err.ToString())
    '   End Try
    'End Sub
   
   Shared Sub Clear()
      
      Try
            Dim config _
            As System.Configuration.Configuration = _
            ConfigurationManager.OpenExeConfiguration( _
            ConfigurationUserLevel.None)


         config.SectionGroups.Clear()
         
         config.Save(ConfigurationSaveMode.Full)
      Catch err As ConfigurationErrorsException
         Console.WriteLine(err.ToString())
      End Try
   End Sub
   

   Shared Sub GetGroup()
      
      Try
            Dim config _
            As System.Configuration.Configuration = _
            ConfigurationManager.OpenExeConfiguration( _
            ConfigurationUserLevel.None)

            Dim groups _
            As ConfigurationSectionGroupCollection = _
            config.SectionGroups

            Dim customGroup _
            As ConfigurationSectionGroup = _
            groups.Get("CustomGroup")
         
         
         If customGroup Is Nothing Then
                Console.WriteLine( _
                "Failed to load CustomGroup.")
         Else
            ' Display section information
                Console.WriteLine("Name:       {0}", _
                customGroup.Name)
                Console.WriteLine("Type:   {0}", _
                customGroup.Type)
         End If
      
      
      Catch err As ConfigurationErrorsException
         Console.WriteLine(err.ToString())
      End Try
   End Sub
   

   Shared Sub GetEnumerator()
      
      Try
            Dim config _
            As System.Configuration.Configuration = _
            ConfigurationManager.OpenExeConfiguration( _
            ConfigurationUserLevel.None)

            Dim groups _
            As ConfigurationSectionGroupCollection = _
            config.SectionGroups

            Dim groupEnum As IEnumerator = _
            groups.GetEnumerator()
         
         Dim i As Integer = 0
         While groupEnum.MoveNext()
            Dim groupName As String = groups.GetKey(i)
            Console.WriteLine("Group name: {0}", groupName)
            i += 1
         End While

      Catch err As ConfigurationErrorsException
         Console.WriteLine(err.ToString())
      End Try
   End Sub
   
   
   ' Get the collection keys i.e., the
   ' group names.
   Shared Sub GetKeys()
      
      Try
            Dim config _
          As System.Configuration.Configuration = _
          ConfigurationManager.OpenExeConfiguration( _
          ConfigurationUserLevel.None)

            Dim groups _
            As ConfigurationSectionGroupCollection = _
            config.SectionGroups

         Dim key As String
         For Each key In  groups.Keys
            
            Console.WriteLine("Key value: {0}", key)
         Next key
      
      
      Catch err As ConfigurationErrorsException
         Console.WriteLine(err.ToString())
      End Try
   End Sub
      

   Shared Sub GetItems()
      
      Try
            Dim config _
        As System.Configuration.Configuration = _
        ConfigurationManager.OpenExeConfiguration( _
        ConfigurationUserLevel.None)

            Dim groups _
            As ConfigurationSectionGroupCollection = _
            config.SectionGroups

            Dim group1 As ConfigurationSectionGroup = _
            groups.Get("system.net")
         
            Dim group2 As ConfigurationSectionGroup = _
            groups.Get("system.web")
         
         
         Console.WriteLine("Group1: {0}", group1.Name)
         
         Console.WriteLine("Group2: {0}", group2.Name)
      
      Catch err As ConfigurationErrorsException
         Console.WriteLine(err.ToString())
      End Try
   End Sub


   Shared Sub Remove()
      
      Try
         
            Dim config _
        As System.Configuration.Configuration = _
        ConfigurationManager.OpenExeConfiguration( _
        ConfigurationUserLevel.None)

            Dim groups _
            As ConfigurationSectionGroupCollection = _
            config.SectionGroups

            Dim customGroup _
            As ConfigurationSectionGroup = groups.Get("CustomGroup")
         
         If Not (customGroup Is Nothing) Then
            config.SectionGroups.Remove("CustomGroup")
            config.Save(ConfigurationSaveMode.Full)
         Else
                Console.WriteLine( _
                "CustomGroup does not exists.")
         End If
      
      Catch err As ConfigurationErrorsException
         Console.WriteLine(err.ToString())
      End Try
   End Sub
   
   
   
   ' Add custom section to the group.
   Shared Sub AddSection()
      Try
         
         Dim customSection As CustomSection
         
         ' Get the current configuration file.
            Dim config _
     As System.Configuration.Configuration = _
     ConfigurationManager.OpenExeConfiguration( _
     ConfigurationUserLevel.None)

            Dim groups _
            As ConfigurationSectionGroupCollection = _
            config.SectionGroups

         ' Create the section entry  
         ' in the <configSections> and the 
         ' related target section in <configuration>.
         Dim customGroup As ConfigurationSectionGroup
            customGroup = groups.Get("CustomGroup")
         
            If customGroup.Sections.Get( _
            "CustomSection") Is Nothing Then
                customSection = New CustomSection()
                customGroup.Sections.Add( _
                "CustomSection", customSection)
                customSection.SectionInformation.ForceSave = True
                config.Save(ConfigurationSaveMode.Full)
            End If
      Catch err As ConfigurationErrorsException
         Console.WriteLine(err.ToString())
      End Try
   End Sub
   
   
   ' Exercise the collection.
   ' Uncomment the function you want to exercise.
    ' Start with CreateSectionGroup().
    Public Overloads Shared Sub Main(ByVal args() As String)
        CreateSectionGroup()
        AddSection()
        ' GetEnumerator();
        ' GetKeys();
        ' GetItems();
        ' Remove();
        ' Clear();

    End Sub
End Class

The following example is an excerpt of the configuration file used by the previous example.

<?xml version="1.0" encoding="utf-8"?>  
<configuration>  
  <configSections>  
    <section name="CustomSection"   
      type="Samples.AspNet.Configuration.CustomSection, ConfigurationSectionCollection, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" allowDefinition="Everywhere" allowExeDefinition="MachineToApplication" restartOnExternalChanges="true" />  
  /configSections>  

<CustomSection fileName="default.txt" maxUsers="1000"   
  maxIdleTime="00:05:00" />  

</configuration>  

Remarks

Use the ConfigurationSectionGroupCollection class to iterate through a collection of ConfigurationSectionGroup objects. You can access this collection of objects using the SectionGroups property or the SectionGroups property.

The ConfigurationSectionGroupCollection class is also used in the creation of custom types that extend the ConfigurationSectionGroup class.

Properties

Count

Gets the number of section groups in the collection.

Count

Gets the number of key/value pairs contained in the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
IsReadOnly

Gets or sets a value indicating whether the NameObjectCollectionBase instance is read-only.

(Inherited from NameObjectCollectionBase)
Item[Int32]

Gets the ConfigurationSectionGroup object whose index is specified from the collection.

Item[String]

Gets the ConfigurationSectionGroup object whose name is specified from the collection.

Keys

Gets the keys to all ConfigurationSectionGroup objects contained in this ConfigurationSectionGroupCollection object.

Keys

Gets a NameObjectCollectionBase.KeysCollection instance that contains all the keys in the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)

Methods

Add(String, ConfigurationSectionGroup)

Adds a ConfigurationSectionGroup object to this ConfigurationSectionGroupCollection object.

BaseAdd(String, Object)

Adds an entry with the specified key and value into the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
BaseClear()

Removes all entries from the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
BaseGet(Int32)

Gets the value of the entry at the specified index of the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
BaseGet(String)

Gets the value of the first entry with the specified key from the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
BaseGetAllKeys()

Returns a String array that contains all the keys in the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
BaseGetAllValues()

Returns an Object array that contains all the values in the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
BaseGetAllValues(Type)

Returns an array of the specified type that contains all the values in the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
BaseGetKey(Int32)

Gets the key of the entry at the specified index of the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
BaseHasKeys()

Gets a value indicating whether the NameObjectCollectionBase instance contains entries whose keys are not null.

(Inherited from NameObjectCollectionBase)
BaseRemove(String)

Removes the entries with the specified key from the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
BaseRemoveAt(Int32)

Removes the entry at the specified index of the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
BaseSet(Int32, Object)

Sets the value of the entry at the specified index of the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
BaseSet(String, Object)

Sets the value of the first entry with the specified key in the NameObjectCollectionBase instance, if found; otherwise, adds an entry with the specified key and value into the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
Clear()

Clears the collection.

CopyTo(ConfigurationSectionGroup[], Int32)

Copies this ConfigurationSectionGroupCollection object to an array.

Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
Get(Int32)

Gets the specified ConfigurationSectionGroup object contained in the collection.

Get(String)

Gets the specified ConfigurationSectionGroup object from the collection.

GetEnumerator()

Gets an enumerator that can iterate through the ConfigurationSectionGroupCollection object.

GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetKey(Int32)

Gets the key of the specified ConfigurationSectionGroup object contained in this ConfigurationSectionGroupCollection object.

GetObjectData(SerializationInfo, StreamingContext)
Obsolete.

Used by the system during serialization.

GetObjectData(SerializationInfo, StreamingContext)
Obsolete.

Implements the ISerializable interface and returns the data needed to serialize the NameObjectCollectionBase instance.

(Inherited from NameObjectCollectionBase)
GetType()

Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
OnDeserialization(Object)

Implements the ISerializable interface and raises the deserialization event when the deserialization is complete.

(Inherited from NameObjectCollectionBase)
Remove(String)

Removes the ConfigurationSectionGroup object whose name is specified from this ConfigurationSectionGroupCollection object.

RemoveAt(Int32)

Removes the ConfigurationSectionGroup object whose index is specified from this ConfigurationSectionGroupCollection object.

ToString()

Returns a string that represents the current object.

(Inherited from Object)

Explicit Interface Implementations

ICollection.CopyTo(Array, Int32)

Copies the entire NameObjectCollectionBase to a compatible one-dimensional Array, starting at the specified index of the target array.

(Inherited from NameObjectCollectionBase)
ICollection.IsSynchronized

Gets a value indicating whether access to the NameObjectCollectionBase object is synchronized (thread safe).

(Inherited from NameObjectCollectionBase)
ICollection.SyncRoot

Gets an object that can be used to synchronize access to the NameObjectCollectionBase object.

(Inherited from NameObjectCollectionBase)

Extension Methods

Cast<TResult>(IEnumerable)

Casts the elements of an IEnumerable to the specified type.

OfType<TResult>(IEnumerable)

Filters the elements of an IEnumerable based on a specified type.

AsParallel(IEnumerable)

Enables parallelization of a query.

AsQueryable(IEnumerable)

Converts an IEnumerable to an IQueryable.

Applies to

See also