ConfigurationElementCollection ConfigurationElementCollection ConfigurationElementCollection ConfigurationElementCollection Class

Definizione

Rappresenta un elemento di configurazione contenente una raccolta di oggetti figlio.Represents a configuration element containing a collection of child elements.

public ref class ConfigurationElementCollection abstract : System::Configuration::ConfigurationElement, System::Collections::ICollection
public abstract class ConfigurationElementCollection : System.Configuration.ConfigurationElement, System.Collections.ICollection
type ConfigurationElementCollection = class
    inherit ConfigurationElement
    interface ICollection
    interface IEnumerable
Public MustInherit Class ConfigurationElementCollection
Inherits ConfigurationElement
Implements ICollection
Ereditarietà
ConfigurationElementCollectionConfigurationElementCollectionConfigurationElementCollectionConfigurationElementCollection
Derivato
Implementazioni

Esempi

Nell'esempio seguente viene illustrato come utilizzare l' ConfigurationElementCollectionoggetto.The following example shows how to use the ConfigurationElementCollection.

Il primo esempio è costituito da tre UrlsSectionclassi UrlsCollection : UrlConfigElement, e. La UrlsSection classeConfigurationCollectionAttribute USA per definire una sezione di configurazione personalizzata.The first example consists of three classes: UrlsSection, UrlsCollection and UrlConfigElement.The UrlsSection class uses the ConfigurationCollectionAttribute to define a custom configuration section. Questa sezione contiene una raccolta di URL (definita dalla UrlsCollection classe) degli elementi URL (definiti UrlConfigElement dalla classe).This section contains a URL collection (defined by the UrlsCollection class) of URL elements (defined by the UrlConfigElement class).

using System;
using System.Configuration;

// Define a UrlsSection custom section that contains a 
// UrlsCollection collection of UrlConfigElement elements.
public class UrlsSection : ConfigurationSection
{

    // Declare the UrlsCollection collection property.
    [ConfigurationProperty("urls", IsDefaultCollection = false)]
    [ConfigurationCollection(typeof(UrlsCollection),
        AddItemName = "add",
        ClearItemsName = "clear",
        RemoveItemName = "remove")]
    public UrlsCollection Urls
    {
        get
        {
            UrlsCollection urlsCollection =
                (UrlsCollection)base["urls"];

            return urlsCollection;
        }

        set
        {
            UrlsCollection urlsCollection = value;
        }
    
    }

    // Create a new instance of the UrlsSection.
    // This constructor creates a configuration element 
    // using the UrlConfigElement default values.
    // It assigns this element to the collection.
    public UrlsSection()
    {
        UrlConfigElement url = new UrlConfigElement();
        Urls.Add(url);

    }

}

// Define the UrlsCollection that contains the 
// UrlsConfigElement elements.
// This class shows how to use the ConfigurationElementCollection.
public class UrlsCollection : ConfigurationElementCollection
{
    
    
    public UrlsCollection()
    {
       
    }

    public override ConfigurationElementCollectionType CollectionType
    {
        get
        {
            return ConfigurationElementCollectionType.AddRemoveClearMap;
        }
    }

    protected override ConfigurationElement CreateNewElement()
    {
        return new UrlConfigElement();
    }

    protected override Object GetElementKey(ConfigurationElement element)
    {
        return ((UrlConfigElement)element).Name;
    }

    public UrlConfigElement this[int index]
    {
        get
        {
            return (UrlConfigElement)BaseGet(index);
        }
        set
        {
            if (BaseGet(index) != null)
            {
                BaseRemoveAt(index);
            }
            BaseAdd(index, value);
        }
    }

    new public UrlConfigElement this[string Name]
    {
        get
        {
            return (UrlConfigElement)BaseGet(Name);
        }
    }
    
    
    public int IndexOf(UrlConfigElement url)
    {
        return BaseIndexOf(url);
    }

    public void Add(UrlConfigElement url)
    {
        BaseAdd(url);

        // Your custom code goes here.
       
    }

    protected override void BaseAdd(ConfigurationElement element)
    {
        BaseAdd(element, false);

        // Your custom code goes here.
      
    }
    
    public void Remove(UrlConfigElement url)
    {
        if (BaseIndexOf(url) >= 0)
        {
            BaseRemove(url.Name);
            // Your custom code goes here.
            Console.WriteLine("UrlsCollection: {0}", "Removed collection element!");
        }
    }
    
    public void RemoveAt(int index)
    {
        BaseRemoveAt(index);

        // Your custom code goes here.
      
    }
    
    public void Remove(string name)
    {
        BaseRemove(name);

        // Your custom code goes here.
      
    }
    
    public void Clear()
    {
        BaseClear();

        // Your custom code goes here.
        Console.WriteLine("UrlsCollection: {0}", "Removed entire collection!");
    }

}

// Define the UrlsConfigElement elements that are contained 
// by the UrlsCollection.
public class UrlConfigElement : ConfigurationElement
{
    public UrlConfigElement(String name, String url, int port)
    {
        this.Name = name;
        this.Url = url;
        this.Port = port;
    }

    public UrlConfigElement()
    {

    }

    [ConfigurationProperty("name", DefaultValue = "Contoso",
        IsRequired = true, IsKey = true)]
    public string Name
    {
        get
        {
            return (string)this["name"];
        }
        set
        {
            this["name"] = value;
        }
    }

    [ConfigurationProperty("url", DefaultValue = "http://www.contoso.com",
        IsRequired = true)]
    [RegexStringValidator(@"\w+:\/\/[\w.]+\S*")]
    public string Url
    {
        get
        {
            return (string)this["url"];
        }
        set
        {
            this["url"] = value;
        }
    }
    
    [ConfigurationProperty("port", DefaultValue = (int)4040, IsRequired = false)]
    [IntegerValidator(MinValue = 0, MaxValue = 8080, ExcludeRange = false)]
    public int Port
    {
        get
        {
            return (int)this["port"];
        }
        set
        {
            this["port"] = value;
        }
    }
    
}
Imports System.Configuration

' Define a UrlsSection custom section that contains a 
' UrlsCollection collection of UrlConfigElement elements.
Public Class UrlsSection
    Inherits ConfigurationSection

    ' Declare the UrlsCollection collection property.
    <ConfigurationProperty("urls", IsDefaultCollection:=False), ConfigurationCollection(GetType(UrlsCollection), AddItemName:="add", ClearItemsName:="clear", RemoveItemName:="remove")>
    Public Property Urls() As UrlsCollection
        Get
            Dim urlsCollection As UrlsCollection = CType(MyBase.Item("urls"), UrlsCollection)

            Return urlsCollection
        End Get

        Set(ByVal value As UrlsCollection)
            Dim urlsCollection As UrlsCollection = value
        End Set

    End Property

    ' Create a new instance of the UrlsSection.
    ' This constructor creates a configuration element 
    ' using the UrlConfigElement default values.
    ' It assigns this element to the collection.
    Public Sub New()
        Dim url As New UrlConfigElement()
        Urls.Add(url)

    End Sub

End Class

' Define the UrlsCollection that contains the 
' UrlsConfigElement elements.
' This class shows how to use the ConfigurationElementCollection.
Public Class UrlsCollection
    Inherits System.Configuration.ConfigurationElementCollection


    Public Sub New()

    End Sub

    Public ReadOnly Property CollectionType() As ConfigurationElementCollectionType
        Get
            Return ConfigurationElementCollectionType.AddRemoveClearMap
        End Get
    End Property

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

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

    Default Public Shadows Property Item(ByVal index As Integer) As UrlConfigElement
        Get
            Return CType(BaseGet(index), UrlConfigElement)
        End Get
        Set(ByVal value As UrlConfigElement)
            If BaseGet(index) IsNot Nothing Then
                BaseRemoveAt(index)
            End If
            BaseAdd(value)
        End Set
    End Property

    Default Public Shadows ReadOnly Property Item(ByVal Name As String) As UrlConfigElement
        Get
            Return CType(BaseGet(Name), UrlConfigElement)
        End Get
    End Property

    Public Function IndexOf(ByVal url As UrlConfigElement) As Integer
        Return BaseIndexOf(url)
    End Function

    Public Sub Add(ByVal url As UrlConfigElement)
        BaseAdd(url)

        ' Your custom code goes here.

    End Sub

    Protected Overloads Sub BaseAdd(ByVal element As ConfigurationElement)
        BaseAdd(element, False)

        ' Your custom code goes here.

    End Sub

    Public Sub Remove(ByVal url As UrlConfigElement)
        If BaseIndexOf(url) >= 0 Then
            BaseRemove(url.Name)
            ' Your custom code goes here.
            Console.WriteLine("UrlsCollection: {0}", "Removed collection element!")
        End If
    End Sub

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

        ' Your custom code goes here.

    End Sub

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

        ' Your custom code goes here.

    End Sub

    Public Sub Clear()
        BaseClear()

        ' Your custom code goes here.
        Console.WriteLine("UrlsCollection: {0}", "Removed entire collection!")
    End Sub

End Class

' Define the UrlsConfigElement elements that are contained 
' by the UrlsCollection.
Public Class UrlConfigElement
    Inherits ConfigurationElement
    Public Sub New(ByVal name As String, ByVal url As String, ByVal port As Integer)
        Me.Name = name
        Me.Url = url
        Me.Port = port
    End Sub

    Public Sub New()

    End Sub

    <ConfigurationProperty("name", DefaultValue:="Contoso", IsRequired:=True, IsKey:=True)>
    Public Property Name() As String
        Get
            Return CStr(Me("name"))
        End Get
        Set(ByVal value As String)
            Me("name") = value
        End Set
    End Property

    <ConfigurationProperty("url", DefaultValue:="http://www.contoso.com", IsRequired:=True), RegexStringValidator("\w+:\/\/[\w.]+\S*")>
    Public Property Url() As String
        Get
            Return CStr(Me("url"))
        End Get
        Set(ByVal value As String)
            Me("url") = value
        End Set
    End Property

    <ConfigurationProperty("port", DefaultValue:=CInt(4040), IsRequired:=False), IntegerValidator(MinValue:=0, MaxValue:=8080, ExcludeRange:=False)>
    Public Property Port() As Integer
        Get
            Return CInt(Fix(Me("port")))
        End Get
        Set(ByVal value As Integer)
            Me("port") = value
        End Set
    End Property

End Class

Nel secondo esempio di codice vengono utilizzate le classi specificate in precedenza.This second code example uses the classes specified before. Questi due esempi vengono combinati in un progetto di applicazione console.You combine these two examples in a console application project.

using System;
using System.Configuration;
using System.Text;

class UsingConfigurationCollectionElement
{

    // Create a custom section and save it in the 
    // application configuration file.
    static void CreateCustomSection()
    {
        try
        {

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

            // Add the custom section to the application
            // configuration file.
            UrlsSection myUrlsSection = (UrlsSection)config.Sections["MyUrls"];

            if (myUrlsSection == null)
            {
                //  The configuration file does not contain the
                // custom section yet. Create it.
                myUrlsSection = new UrlsSection();

                config.Sections.Add("MyUrls", myUrlsSection);

                // Save the application configuration file.
                myUrlsSection.SectionInformation.ForceSave = true;
                config.Save(ConfigurationSaveMode.Modified); 
            }
            else
                if (myUrlsSection.Urls.Count == 0)
                {

                    // The configuration file contains the
                    // custom section but its element collection is empty.
                    // Initialize the collection. 
                    UrlConfigElement url = new UrlConfigElement();
                    myUrlsSection.Urls.Add(url);

                    // Save the application configuration file.
                    myUrlsSection.SectionInformation.ForceSave = true;
                    config.Save(ConfigurationSaveMode.Modified);
                }

       
            Console.WriteLine("Created custom section in the application configuration file: {0}",
                config.FilePath);
            Console.WriteLine();

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

    }

    static void ReadCustomSection()
    {
        try
        {
            // Get the application configuration file.
            System.Configuration.Configuration config =
                    ConfigurationManager.OpenExeConfiguration(
                    ConfigurationUserLevel.None) as Configuration;

            // Read and display the custom section.
            UrlsSection myUrlsSection =
               config.GetSection("MyUrls") as UrlsSection;

            if (myUrlsSection == null)
                Console.WriteLine("Failed to load UrlsSection.");
            else
            {
                Console.WriteLine("Collection elements contained in the custom section collection:");
                for (int i = 0; i < myUrlsSection.Urls.Count; i++)
                {
                    Console.WriteLine("   Name={0} URL={1} Port={2}",
                        myUrlsSection.Urls[i].Name,
                        myUrlsSection.Urls[i].Url,
                        myUrlsSection.Urls[i].Port);
                }
            }

        }
        catch (ConfigurationErrorsException err)
        {
            Console.WriteLine("ReadCustomSection(string): {0}", err.ToString());
        }

    }

    // Add an element to the custom section collection.
    // This function uses the ConfigurationCollectionElement Add method.
    static void AddCollectionElement()
    {
        try
        {

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


            // Get the custom configuration section.
            UrlsSection myUrlsSection = config.GetSection("MyUrls") as UrlsSection;


            // Add the element to the collection in the custom section.
            if (config.Sections["MyUrls"] != null)
            {
                UrlConfigElement urlElement = new UrlConfigElement();
                urlElement.Name = "Microsoft";
                urlElement.Url = "http://www.microsoft.com";
                urlElement.Port = 8080;
                
                // Use the ConfigurationCollectionElement Add method
                // to add the new element to the collection.
                myUrlsSection.Urls.Add(urlElement);
                
                
                // Save the application configuration file.
                myUrlsSection.SectionInformation.ForceSave = true;
                config.Save(ConfigurationSaveMode.Modified);
                

                Console.WriteLine("Added collection element to the custom section in the configuration file: {0}",
                    config.FilePath);
                Console.WriteLine();
            }
            else
                Console.WriteLine("You must create the custom section first.");

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

    }

    // Remove element from the custom section collection.
    // This function uses one of the ConfigurationCollectionElement 
    // overloaded Remove methods.
    static void RemoveCollectionElement()
    {
        try
        {

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


            // Get the custom configuration section.
            UrlsSection myUrlsSection = config.GetSection("MyUrls") as UrlsSection;


            // Remove the element from the custom section.
            if (config.Sections["MyUrls"] != null)
            {
                UrlConfigElement urlElement = new UrlConfigElement();
                urlElement.Name = "Microsoft";
                urlElement.Url = "http://www.microsoft.com";
                urlElement.Port = 8080;

                // Use one of the ConfigurationCollectionElement Remove 
                // overloaded methods to remove the element from the collection.
                myUrlsSection.Urls.Remove(urlElement);


                // Save the application configuration file.
                myUrlsSection.SectionInformation.ForceSave = true;
                config.Save(ConfigurationSaveMode.Full);


                Console.WriteLine("Removed collection element from he custom section in the configuration file: {0}",
                    config.FilePath);
                Console.WriteLine();
            }
            else
                Console.WriteLine("You must create the custom section first.");

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

    }

    // Remove the collection of elements from the custom section.
    // This function uses the ConfigurationCollectionElement Clear method.
    static void ClearCollectionElements()
    {
        try
        {

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


            // Get the custom configuration section.
            UrlsSection myUrlsSection = config.GetSection("MyUrls") as UrlsSection;


            // Remove the collection of elements from the section.
            if (config.Sections["MyUrls"] != null)
            {
                myUrlsSection.Urls.Clear();


                // Save the application configuration file.
                myUrlsSection.SectionInformation.ForceSave = true;
                config.Save(ConfigurationSaveMode.Full);


                Console.WriteLine("Removed collection of elements from he custom section in the configuration file: {0}",
                    config.FilePath);
                Console.WriteLine();
            }
            else
                Console.WriteLine("You must create the custom section first.");

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

    }

    public static void UserMenu()
    {
        string applicationName =
           Environment.GetCommandLineArgs()[0] + ".exe";
        StringBuilder buffer = new StringBuilder();

        buffer.AppendLine("Application: " + applicationName);
        buffer.AppendLine("Make your selection.");
        buffer.AppendLine("?    -- Display help.");
        buffer.AppendLine("Q,q  -- Exit the application.");
        buffer.Append("1    -- Create a custom section that");
        buffer.AppendLine(" contains a collection of elements.");
        buffer.Append("2    -- Read the custom section that");
        buffer.AppendLine(" contains a collection of custom elements.");
        buffer.Append("3    -- Add a collection element to");
        buffer.AppendLine(" the custom section.");
        buffer.Append("4    -- Remove a collection element from");
        buffer.AppendLine(" the custom section.");
        buffer.Append("5    -- Clear the collection of elements from");
        buffer.AppendLine(" the custom section.");
        
        Console.Write(buffer.ToString());
    }

    // Obtain user's input and provide
    // feedback.
    static void Main(string[] args)
    {
        // Define user selection string.
        string selection;

        // Get the name of the application.
        string appName =
          Environment.GetCommandLineArgs()[0];

        // Get user selection.
        while (true)
        {

            UserMenu();
            Console.Write("> ");
            selection = Console.ReadLine();
            if (!string.IsNullOrEmpty(selection))
                break;
        }

        while (selection.ToLower() != "q")
        {
            // Process user's input.
            switch (selection)
            {
                case "1":
                    // Create a custom section and save it in the 
                    // application configuration file.
                    CreateCustomSection();
                    break;

                case "2":
                    // Read the custom section from the
                    // application configuration file.
                    ReadCustomSection();
                    break;

                case "3":
                    // Add a collection element to the
                    // custom section.
                    AddCollectionElement();
                    break;

                case "4":
                    // Remove a collection element from the
                    // custom section.
                    RemoveCollectionElement();
                    break;

                case "5":
                    // Clear the collection of elements from the
                    // custom section.
                    ClearCollectionElements();
                    break;

                default:
                    UserMenu();
                    break;
            }
            Console.Write("> ");
            selection = Console.ReadLine();
        }
    }
}
Imports System.Configuration
Imports System.Text

Friend Class UsingConfigurationCollectionElement

    ' Create a custom section and save it in the 
    ' application configuration file.
    Private Shared Sub CreateCustomSection()
        Try

            ' Get the current configuration file.
            Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)

            ' Add the custom section to the application
            ' configuration file.
            Dim myUrlsSection As UrlsSection = CType(config.Sections("MyUrls"), UrlsSection)

            If myUrlsSection Is Nothing Then
                '  The configuration file does not contain the
                ' custom section yet. Create it.
                myUrlsSection = New UrlsSection()

                config.Sections.Add("MyUrls", myUrlsSection)

                ' Save the application configuration file.
                myUrlsSection.SectionInformation.ForceSave = True
                config.Save(ConfigurationSaveMode.Modified)
            Else
                If myUrlsSection.Urls.Count = 0 Then

                    ' The configuration file contains the
                    ' custom section but its element collection is empty.
                    ' Initialize the collection. 
                    Dim url As New UrlConfigElement()
                    myUrlsSection.Urls.Add(url)

                    ' Save the application configuration file.
                    myUrlsSection.SectionInformation.ForceSave = True
                    config.Save(ConfigurationSaveMode.Modified)
                End If
            End If


            Console.WriteLine("Created custom section in the application configuration file: {0}", config.FilePath)
            Console.WriteLine()

        Catch err As ConfigurationErrorsException
            Console.WriteLine("CreateCustomSection: {0}", err.ToString())
        End Try

    End Sub

    Private Shared Sub ReadCustomSection()
        Try
            ' Get the application configuration file.
            Dim config As System.Configuration.Configuration = TryCast(ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None), Configuration)

            ' Read and display the custom section.
            Dim myUrlsSection As UrlsSection = TryCast(config.GetSection("MyUrls"), UrlsSection)

            If myUrlsSection Is Nothing Then
                Console.WriteLine("Failed to load UrlsSection.")
            Else
                Console.WriteLine("Collection elements contained in the custom section collection:")
                For i As Integer = 0 To myUrlsSection.Urls.Count - 1
                    Console.WriteLine("   Name={0} URL={1} Port={2}", myUrlsSection.Urls(i).Name, myUrlsSection.Urls(i).Url, myUrlsSection.Urls(i).Port)
                Next i
            End If

        Catch err As ConfigurationErrorsException
            Console.WriteLine("ReadCustomSection(string): {0}", err.ToString())
        End Try

    End Sub

    ' Add an element to the custom section collection.
    ' This function uses the ConfigurationCollectionElement Add method.
    Private Shared Sub AddCollectionElement()
        Try

            ' Get the current configuration file.
            Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)


            ' Get the custom configuration section.
            Dim myUrlsSection As UrlsSection = TryCast(config.GetSection("MyUrls"), UrlsSection)


            ' Add the element to the collection in the custom section.
            If config.Sections("MyUrls") IsNot Nothing Then
                Dim urlElement As New UrlConfigElement()
                urlElement.Name = "Microsoft"
                urlElement.Url = "http://www.microsoft.com"
                urlElement.Port = 8080

                ' Use the ConfigurationCollectionElement Add method
                ' to add the new element to the collection.
                myUrlsSection.Urls.Add(urlElement)


                ' Save the application configuration file.
                myUrlsSection.SectionInformation.ForceSave = True
                config.Save(ConfigurationSaveMode.Modified)


                Console.WriteLine("Added collection element to the custom section in the configuration file: {0}", config.FilePath)
                Console.WriteLine()
            Else
                Console.WriteLine("You must create the custom section first.")
            End If

        Catch err As ConfigurationErrorsException
            Console.WriteLine("AddCollectionElement: {0}", err.ToString())
        End Try

    End Sub

    ' Remove element from the custom section collection.
    ' This function uses one of the ConfigurationCollectionElement 
    ' overloaded Remove methods.
    Private Shared Sub RemoveCollectionElement()
        Try

            ' Get the current configuration file.
            Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)


            ' Get the custom configuration section.
            Dim myUrlsSection As UrlsSection = TryCast(config.GetSection("MyUrls"), UrlsSection)


            ' Remove the element from the custom section.
            If config.Sections("MyUrls") IsNot Nothing Then
                Dim urlElement As New UrlConfigElement()
                urlElement.Name = "Microsoft"
                urlElement.Url = "http://www.microsoft.com"
                urlElement.Port = 8080

                ' Use one of the ConfigurationCollectionElement Remove 
                ' overloaded methods to remove the element from the collection.
                myUrlsSection.Urls.Remove(urlElement)


                ' Save the application configuration file.
                myUrlsSection.SectionInformation.ForceSave = True
                config.Save(ConfigurationSaveMode.Full)


                Console.WriteLine("Removed collection element from he custom section in the configuration file: {0}", config.FilePath)
                Console.WriteLine()
            Else
                Console.WriteLine("You must create the custom section first.")
            End If

        Catch err As ConfigurationErrorsException
            Console.WriteLine("RemoveCollectionElement: {0}", err.ToString())
        End Try

    End Sub

    ' Remove the collection of elements from the custom section.
    ' This function uses the ConfigurationCollectionElement Clear method.
    Private Shared Sub ClearCollectionElements()
        Try

            ' Get the current configuration file.
            Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)


            ' Get the custom configuration section.
            Dim myUrlsSection As UrlsSection = TryCast(config.GetSection("MyUrls"), UrlsSection)


            ' Remove the collection of elements from the section.
            If config.Sections("MyUrls") IsNot Nothing Then
                myUrlsSection.Urls.Clear()


                ' Save the application configuration file.
                myUrlsSection.SectionInformation.ForceSave = True
                config.Save(ConfigurationSaveMode.Full)


                Console.WriteLine("Removed collection of elements from he custom section in the configuration file: {0}", config.FilePath)
                Console.WriteLine()
            Else
                Console.WriteLine("You must create the custom section first.")
            End If

        Catch err As ConfigurationErrorsException
            Console.WriteLine("ClearCollectionElements: {0}", err.ToString())
        End Try

    End Sub

    Public Shared Sub UserMenu()
        Dim applicationName As String = Environment.GetCommandLineArgs()(0) & ".exe"
        Dim buffer As New StringBuilder()

        buffer.AppendLine("Application: " & applicationName)
        buffer.AppendLine("Make your selection.")
        buffer.AppendLine("?    -- Display help.")
        buffer.AppendLine("Q,q  -- Exit the application.")
        buffer.Append("1    -- Create a custom section that")
        buffer.AppendLine(" contains a collection of elements.")
        buffer.Append("2    -- Read the custom section that")
        buffer.AppendLine(" contains a collection of custom elements.")
        buffer.Append("3    -- Add a collection element to")
        buffer.AppendLine(" the custom section.")
        buffer.Append("4    -- Remove a collection element from")
        buffer.AppendLine(" the custom section.")
        buffer.Append("5    -- Clear the collection of elements from")
        buffer.AppendLine(" the custom section.")

        Console.Write(buffer.ToString())
    End Sub

    ' Obtain user's input and provide
    ' feedback.
    Shared Sub Main(ByVal args() As String)
        ' Define user selection string.
        Dim selection As String

        ' Get the name of the application.
        Dim appName As String = Environment.GetCommandLineArgs()(0)

        ' Get user selection.
        Do

            UserMenu()
            Console.Write("> ")
            selection = Console.ReadLine()
            If selection <> String.Empty Then
                Exit Do
            End If
        Loop

        Do While selection.ToLower() <> "q"
            ' Process user's input.
            Select Case selection
                Case "1"
                    ' Create a custom section and save it in the 
                    ' application configuration file.
                    CreateCustomSection()

                Case "2"
                    ' Read the custom section from the
                    ' application configuration file.
                    ReadCustomSection()

                Case "3"
                    ' Add a collection element to the
                    ' custom section.
                    AddCollectionElement()

                Case "4"
                    ' Remove a collection element from the
                    ' custom section.
                    RemoveCollectionElement()

                Case "5"
                    ' Clear the collection of elements from the
                    ' custom section.
                    ClearCollectionElements()

                Case Else
                    UserMenu()
            End Select
            Console.Write("> ")
            selection = Console.ReadLine()
        Loop
    End Sub
End Class

Quando si esegue l'applicazione console, viene creata un'istanza UrlsSection della classe e vengono generati gli elementi di configurazione seguenti nel file di configurazione dell'applicazione:When you run the console application, an instance of the UrlsSection class is created and the following configuration elements are generated in the application configuration file:

<configuration>  
    <configSections>  
        <section name="MyUrls" type="UrlsSection,   
          ConfigurationElementCollection, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />  
    </configSections>  
    <MyUrls>  
        <urls>  
           <add name="Contoso" url="http://www.contoso.com" port="4040 />  
        </urls>  
    </MyUrls>  
</configuration  

Commenti

ConfigurationElementCollection Rappresenta una raccolta di elementi all'interno di un file di configurazione.The ConfigurationElementCollection represents a collection of elements within a configuration file.

Nota

Un elemento all'interno di un file di configurazione fa riferimento a un elemento XML di base o a una sezione.An element within a configuration file refers to a basic XML element or a section. Un elemento semplice è un tag XML con attributi correlati, se presenti.A simple element is an XML tag with related attributes, if any. Un elemento semplice costituisce una sezione.A simple element constitutes a section. Le sezioni complesse possono contenere uno o più elementi semplici, una raccolta di elementi e altre sezioni.Complex sections can contain one or more simple elements, a collection of elements, and other sections.

Usare ConfigurationElementCollection per lavorare con una raccolta di ConfigurationElement oggetti.You use the ConfigurationElementCollection to work with a collection of ConfigurationElement objects. Implementare questa classe per aggiungere raccolte di elementi ConfigurationElement personalizzati a un ConfigurationSectionoggetto.Implement this class to add collections of custom ConfigurationElement elements to a ConfigurationSection.

Note per gli eredi

Per creare un elemento di configurazione personalizzato, è possibile usare un modello di codifica a livello di codice o dichiarativo (con attributi).You can use a programmatic or a declarative (attributed) coding model to create a custom configuration element.

Il modello a livello di codice richiede che per ogni attributo dell'elemento venga creata una proprietà per ottenere e impostare il relativo valore e che venga aggiunto al contenitore di proprietà interno ConfigurationElement della classe di base sottostante.The programmatic model requires that for each element attribute you create a property to get and set its value, and that you add it to the internal property bag of the underlying ConfigurationElement base class.

Il modello dichiarativo, noto anche come modello con attributi, consente di definire un attributo dell'elemento utilizzando una proprietà e configurarla con gli attributi.The declarative model, also referred to as the attributed model, allows you to define an element attribute by using a property and configuring it with attributes. Questi attributi indicano al sistema di configurazione ASP.NET i tipi di proprietà e i relativi valori predefiniti.These attributes instruct the ASP.NET configuration system about the property types and their default values. ASP.NET può utilizzare la reflection per ottenere queste informazioni, quindi creare gli oggetti proprietà degli elementi ed eseguire l'inizializzazione richiesta.ASP.NET can use reflection to obtain this information and then create the element property objects and perform the required initialization.

Costruttori

ConfigurationElementCollection() ConfigurationElementCollection() ConfigurationElementCollection() ConfigurationElementCollection()

Inizializza una nuova istanza della classe ConfigurationElementCollection.Initializes a new instance of the ConfigurationElementCollection class.

ConfigurationElementCollection(IComparer) ConfigurationElementCollection(IComparer) ConfigurationElementCollection(IComparer) ConfigurationElementCollection(IComparer)

Crea una nuova istanza della classe ConfigurationElementCollection.Creates a new instance of the ConfigurationElementCollection class.

Proprietà

AddElementName AddElementName AddElementName AddElementName

Ottiene o imposta il nome della classe ConfigurationElement da associare all'operazione di aggiunta nella classe ConfigurationElementCollection quando viene sottoposto a override in un classe derivata.Gets or sets the name of the ConfigurationElement to associate with the add operation in the ConfigurationElementCollection when overridden in a derived class.

ClearElementName ClearElementName ClearElementName ClearElementName

Ottiene o imposta il nome della classe ConfigurationElement da associare all'operazione di cancellazione nella classe ConfigurationElementCollection quando viene sottoposto a override in un classe derivata.Gets or sets the name for the ConfigurationElement to associate with the clear operation in the ConfigurationElementCollection when overridden in a derived class.

CollectionType CollectionType CollectionType CollectionType

Ottiene il tipo di ConfigurationElementCollection.Gets the type of the ConfigurationElementCollection.

Count Count Count Count

Ottiene il numero di elementi nella raccolta.Gets the number of elements in the collection.

CurrentConfiguration CurrentConfiguration CurrentConfiguration CurrentConfiguration

Ottiene un riferimento all'istanza di Configuration di livello superiore che rappresenta la gerarchia di configurazione cui appartiene l'istanza corrente di ConfigurationElement.Gets a reference to the top-level Configuration instance that represents the configuration hierarchy that the current ConfigurationElement instance belongs to.

(Inherited from ConfigurationElement)
ElementInformation ElementInformation ElementInformation ElementInformation

Ottiene un oggetto ElementInformation contenente le funzionalità e le informazioni non personalizzabili dell'oggetto ConfigurationElement.Gets an ElementInformation object that contains the non-customizable information and functionality of the ConfigurationElement object.

(Inherited from ConfigurationElement)
ElementName ElementName ElementName ElementName

Ottiene il nome utilizzato per identificare questo insieme di elementi nel file di configurazione quando è sottoposto a override in un classe derivata.Gets the name used to identify this collection of elements in the configuration file when overridden in a derived class.

ElementProperty ElementProperty ElementProperty ElementProperty

Ottiene l'oggetto ConfigurationElementProperty che rappresenta l'oggetto ConfigurationElement stesso.Gets the ConfigurationElementProperty object that represents the ConfigurationElement object itself.

(Inherited from ConfigurationElement)
EmitClear EmitClear EmitClear EmitClear

Ottiene o imposta un valore che specifica se l'insieme è stato cancellato.Gets or sets a value that specifies whether the collection has been cleared.

EvaluationContext EvaluationContext EvaluationContext EvaluationContext

Ottiene l'oggetto ContextInformation per l'oggetto ConfigurationElement.Gets the ContextInformation object for the ConfigurationElement object.

(Inherited from ConfigurationElement)
HasContext HasContext HasContext HasContext

Ottiene un valore che indica se la proprietà CurrentConfiguration è null.Gets a value that indicates whether the CurrentConfiguration property is null.

(Inherited from ConfigurationElement)
IsSynchronized IsSynchronized IsSynchronized IsSynchronized

Ottiene un valore che indica se l'accesso all'insieme è sincronizzato.Gets a value indicating whether access to the collection is synchronized.

Item[ConfigurationProperty] Item[ConfigurationProperty] Item[ConfigurationProperty] Item[ConfigurationProperty]

Ottiene o imposta una proprietà o un attributo di questo elemento di configurazione.Gets or sets a property or attribute of this configuration element.

(Inherited from ConfigurationElement)
Item[String] Item[String] Item[String] Item[String]

Ottiene o imposta una proprietà, un attributo o un elemento figlio di questo elemento di configurazione.Gets or sets a property, attribute, or child element of this configuration element.

(Inherited from ConfigurationElement)
LockAllAttributesExcept LockAllAttributesExcept LockAllAttributesExcept LockAllAttributesExcept

Ottiene l'insieme di attributi bloccati.Gets the collection of locked attributes.

(Inherited from ConfigurationElement)
LockAllElementsExcept LockAllElementsExcept LockAllElementsExcept LockAllElementsExcept

Ottiene l'insieme di elementi bloccati.Gets the collection of locked elements.

(Inherited from ConfigurationElement)
LockAttributes LockAttributes LockAttributes LockAttributes

Ottiene l'insieme di attributi bloccatiGets the collection of locked attributes

(Inherited from ConfigurationElement)
LockElements LockElements LockElements LockElements

Ottiene l'insieme di elementi bloccati.Gets the collection of locked elements.

(Inherited from ConfigurationElement)
LockItem LockItem LockItem LockItem

Ottiene o imposta un valore che indica se l'elemento è bloccato.Gets or sets a value indicating whether the element is locked.

(Inherited from ConfigurationElement)
Properties Properties Properties Properties

Ottiene l'insieme di proprietà.Gets the collection of properties.

(Inherited from ConfigurationElement)
RemoveElementName RemoveElementName RemoveElementName RemoveElementName

Ottiene o imposta il nome della classe ConfigurationElement da associare all'operazione di rimozione nella classe ConfigurationElementCollection quando viene sottoposto a override in un classe derivata.Gets or sets the name of the ConfigurationElement to associate with the remove operation in the ConfigurationElementCollection when overridden in a derived class.

SyncRoot SyncRoot SyncRoot SyncRoot

Ottiene un oggetto utilizzato per sincronizzare l'accesso alla classe ConfigurationElementCollection.Gets an object used to synchronize access to the ConfigurationElementCollection.

ThrowOnDuplicate ThrowOnDuplicate ThrowOnDuplicate ThrowOnDuplicate

Ottiene un valore indicante se il tentativo di aggiungere una classe ConfigurationElement duplicata alla classe ConfigurationElementCollection genererà un'eccezione.Gets a value indicating whether an attempt to add a duplicate ConfigurationElement to the ConfigurationElementCollection will cause an exception to be thrown.

Metodi

BaseAdd(ConfigurationElement) BaseAdd(ConfigurationElement) BaseAdd(ConfigurationElement) BaseAdd(ConfigurationElement)

Aggiunge un elemento di configurazione alla classe ConfigurationElementCollection.Adds a configuration element to the ConfigurationElementCollection.

BaseAdd(ConfigurationElement, Boolean) BaseAdd(ConfigurationElement, Boolean) BaseAdd(ConfigurationElement, Boolean) BaseAdd(ConfigurationElement, Boolean)

Aggiunge un elemento di configurazione all'insieme di elementi di configurazione.Adds a configuration element to the configuration element collection.

BaseAdd(Int32, ConfigurationElement) BaseAdd(Int32, ConfigurationElement) BaseAdd(Int32, ConfigurationElement) BaseAdd(Int32, ConfigurationElement)

Aggiunge un elemento di configurazione all'insieme di elementi di configurazione.Adds a configuration element to the configuration element collection.

BaseClear() BaseClear() BaseClear() BaseClear()

Rimuove tutti gli oggetti dell'elemento di configurazione dall'insieme.Removes all configuration element objects from the collection.

BaseGet(Int32) BaseGet(Int32) BaseGet(Int32) BaseGet(Int32)

Ottiene l'elemento di configurazione in corrispondenza della posizione di indice specificata.Gets the configuration element at the specified index location.

BaseGet(Object) BaseGet(Object) BaseGet(Object) BaseGet(Object)

Restituisce l'elemento di configurazione con la chiave specificata.Returns the configuration element with the specified key.

BaseGetAllKeys() BaseGetAllKeys() BaseGetAllKeys() BaseGetAllKeys()

Restituisce una matrice delle chiavi di tutti gli elementi di configurazione inclusi nella classe ConfigurationElementCollection.Returns an array of the keys for all of the configuration elements contained in the ConfigurationElementCollection.

BaseGetKey(Int32) BaseGetKey(Int32) BaseGetKey(Int32) BaseGetKey(Int32)

Ottiene la chiave per la classe ConfigurationElement in corrispondenza della posizione di indice specificata.Gets the key for the ConfigurationElement at the specified index location.

BaseIndexOf(ConfigurationElement) BaseIndexOf(ConfigurationElement) BaseIndexOf(ConfigurationElement) BaseIndexOf(ConfigurationElement)

Indica l'indice della classe ConfigurationElement specificata.Indicates the index of the specified ConfigurationElement.

BaseIsRemoved(Object) BaseIsRemoved(Object) BaseIsRemoved(Object) BaseIsRemoved(Object)

Indica se la classe ConfigurationElement con la chiave specificata è stata rimossa dalla classe ConfigurationElementCollection.Indicates whether the ConfigurationElement with the specified key has been removed from the ConfigurationElementCollection.

BaseRemove(Object) BaseRemove(Object) BaseRemove(Object) BaseRemove(Object)

Rimuove un oggetto ConfigurationElement dalla raccolta.Removes a ConfigurationElement from the collection.

BaseRemoveAt(Int32) BaseRemoveAt(Int32) BaseRemoveAt(Int32) BaseRemoveAt(Int32)

Rimuove la classe ConfigurationElement in corrispondenza della posizione di indice specificata.Removes the ConfigurationElement at the specified index location.

CopyTo(ConfigurationElement[], Int32) CopyTo(ConfigurationElement[], Int32) CopyTo(ConfigurationElement[], Int32) CopyTo(ConfigurationElement[], Int32)

Copia il contenuto della classe ConfigurationElementCollection in una matrice.Copies the contents of the ConfigurationElementCollection to an array.

CreateNewElement() CreateNewElement() CreateNewElement() CreateNewElement()

Quando è sottoposto a override in una classe derivata, crea un nuovo elemento ConfigurationElement.When overridden in a derived class, creates a new ConfigurationElement.

CreateNewElement(String) CreateNewElement(String) CreateNewElement(String) CreateNewElement(String)

Crea una nuova classe ConfigurationElement quando è sottoposto a override in una classe derivata.Creates a new ConfigurationElement when overridden in a derived class.

DeserializeElement(XmlReader, Boolean) DeserializeElement(XmlReader, Boolean) DeserializeElement(XmlReader, Boolean) DeserializeElement(XmlReader, Boolean)

Legge il codice XML dal file di configurazione.Reads XML from the configuration file.

(Inherited from ConfigurationElement)
Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Confronta la classe ConfigurationElementCollection con l'oggetto specificato.Compares the ConfigurationElementCollection to the specified object.

GetElementKey(ConfigurationElement) GetElementKey(ConfigurationElement) GetElementKey(ConfigurationElement) GetElementKey(ConfigurationElement)

Ottiene la chiave per un elemento di configurazione specificato quando viene sottoposto a override in un classe derivata.Gets the element key for a specified configuration element when overridden in a derived class.

GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator()

Ottiene un'interfaccia IEnumerator utilizzata per scorrere la classe ConfigurationElementCollection.Gets an IEnumerator which is used to iterate through the ConfigurationElementCollection.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Ottiene un valore univoco che rappresenta l'istanza di ConfigurationElementCollection.Gets a unique value representing the ConfigurationElementCollection instance.

GetTransformedAssemblyString(String) GetTransformedAssemblyString(String) GetTransformedAssemblyString(String) GetTransformedAssemblyString(String)

Restituisce la versione trasformata del nome di assembly specificato.Returns the transformed version of the specified assembly name.

(Inherited from ConfigurationElement)
GetTransformedTypeString(String) GetTransformedTypeString(String) GetTransformedTypeString(String) GetTransformedTypeString(String)

Restituisce la versione trasformata del nome del tipo specificato.Returns the transformed version of the specified type name.

(Inherited from ConfigurationElement)
GetType() GetType() GetType() GetType()

Ottiene l'oggetto Type dell'istanza corrente.Gets the Type of the current instance.

(Inherited from Object)
Init() Init() Init() Init()

Ripristina lo stato iniziale dell'oggetto ConfigurationElement.Sets the ConfigurationElement object to its initial state.

(Inherited from ConfigurationElement)
InitializeDefault() InitializeDefault() InitializeDefault() InitializeDefault()

Da utilizzare per inizializzare un insieme predefinito di valori per l'oggetto ConfigurationElement.Used to initialize a default set of values for the ConfigurationElement object.

(Inherited from ConfigurationElement)
IsElementName(String) IsElementName(String) IsElementName(String) IsElementName(String)

Indica se la classe ConfigurationElement specificata esiste nella classe ConfigurationElementCollection.Indicates whether the specified ConfigurationElement exists in the ConfigurationElementCollection.

IsElementRemovable(ConfigurationElement) IsElementRemovable(ConfigurationElement) IsElementRemovable(ConfigurationElement) IsElementRemovable(ConfigurationElement)

Indica se è possibile rimuovere l'oggetto ConfigurationElement da ConfigurationElementCollection.Indicates whether the specified ConfigurationElement can be removed from the ConfigurationElementCollection.

IsModified() IsModified() IsModified() IsModified()

Indica se questa classe ConfigurationElementCollection è stata modificata dall'ultimo salvataggio o caricamento durante l'override in una classe derivata.Indicates whether this ConfigurationElementCollection has been modified since it was last saved or loaded when overridden in a derived class.

IsReadOnly() IsReadOnly() IsReadOnly() IsReadOnly()

Indica se l'oggetto ConfigurationElementCollection è in sola lettura.Indicates whether the ConfigurationElementCollection object is read only.

ListErrors(IList) ListErrors(IList) ListErrors(IList) ListErrors(IList)

Aggiunge all'elenco passato gli errori di proprietà non valida di questo oggetto ConfigurationElement e di tutti i sottoelementi.Adds the invalid-property errors in this ConfigurationElement object, and in all subelements, to the passed list.

(Inherited from ConfigurationElement)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Crea una copia superficiale dell'oggetto Object corrente.Creates a shallow copy of the current Object.

(Inherited from Object)
OnDeserializeUnrecognizedAttribute(String, String) OnDeserializeUnrecognizedAttribute(String, String) OnDeserializeUnrecognizedAttribute(String, String) OnDeserializeUnrecognizedAttribute(String, String)

Ottiene un valore che indica se viene incontrato un attributo sconosciuto durante la deserializzazione.Gets a value indicating whether an unknown attribute is encountered during deserialization.

(Inherited from ConfigurationElement)
OnDeserializeUnrecognizedElement(String, XmlReader) OnDeserializeUnrecognizedElement(String, XmlReader) OnDeserializeUnrecognizedElement(String, XmlReader) OnDeserializeUnrecognizedElement(String, XmlReader)

Fa generare un'eccezione al sistema di configurazione.Causes the configuration system to throw an exception.

OnRequiredPropertyNotFound(String) OnRequiredPropertyNotFound(String) OnRequiredPropertyNotFound(String) OnRequiredPropertyNotFound(String)

Genera un'eccezione quando una proprietà obbligatoria non viene trovata.Throws an exception when a required property is not found.

(Inherited from ConfigurationElement)
PostDeserialize() PostDeserialize() PostDeserialize() PostDeserialize()

Da chiamare dopo la deserializzazione.Called after deserialization.

(Inherited from ConfigurationElement)
PreSerialize(XmlWriter) PreSerialize(XmlWriter) PreSerialize(XmlWriter) PreSerialize(XmlWriter)

Da chiamare prima della serializzazione.Called before serialization.

(Inherited from ConfigurationElement)
Reset(ConfigurationElement) Reset(ConfigurationElement) Reset(ConfigurationElement) Reset(ConfigurationElement)

Reimposta la classe ConfigurationElementCollection sullo stato non modificato quando viene sottoposta a override in una classe derivata.Resets the ConfigurationElementCollection to its unmodified state when overridden in a derived class.

ResetModified() ResetModified() ResetModified() ResetModified()

Reimposta il valore della proprietà IsModified() su false quando viene sottoposto a override in una classe derivata.Resets the value of the IsModified() property to false when overridden in a derived class.

SerializeElement(XmlWriter, Boolean) SerializeElement(XmlWriter, Boolean) SerializeElement(XmlWriter, Boolean) SerializeElement(XmlWriter, Boolean)

Scrive i dati di configurazione in un elemento XML del file di configurazione quando vengono sottoposti a override in una classe derivata.Writes the configuration data to an XML element in the configuration file when overridden in a derived class.

SerializeToXmlElement(XmlWriter, String) SerializeToXmlElement(XmlWriter, String) SerializeToXmlElement(XmlWriter, String) SerializeToXmlElement(XmlWriter, String)

Scrive i tag esterni di questo elemento di configurazione nel file di configurazione in caso di implementazione in una classe derivata.Writes the outer tags of this configuration element to the configuration file when implemented in a derived class.

(Inherited from ConfigurationElement)
SetPropertyValue(ConfigurationProperty, Object, Boolean) SetPropertyValue(ConfigurationProperty, Object, Boolean) SetPropertyValue(ConfigurationProperty, Object, Boolean) SetPropertyValue(ConfigurationProperty, Object, Boolean)

Imposta una proprietà sul valore specificato.Sets a property to the specified value.

(Inherited from ConfigurationElement)
SetReadOnly() SetReadOnly() SetReadOnly() SetReadOnly()

Imposta la proprietà IsReadOnly() per l'oggetto ConfigurationElementCollection e per tutti i sottoelementi.Sets the IsReadOnly() property for the ConfigurationElementCollection object and for all sub-elements.

ToString() ToString() ToString() ToString()

Restituisce una stringa che rappresenta l'oggetto corrente.Returns a string that represents the current object.

(Inherited from Object)
Unmerge(ConfigurationElement, ConfigurationElement, ConfigurationSaveMode) Unmerge(ConfigurationElement, ConfigurationElement, ConfigurationSaveMode) Unmerge(ConfigurationElement, ConfigurationElement, ConfigurationSaveMode) Unmerge(ConfigurationElement, ConfigurationElement, ConfigurationSaveMode)

Inverte l'effetto dell'unione delle informazioni sulla configurazione da livelli diversi della gerarchia di configurazione.Reverses the effect of merging configuration information from different levels of the configuration hierarchy.

Implementazioni dell'interfaccia esplicita

ICollection.CopyTo(Array, Int32) ICollection.CopyTo(Array, Int32) ICollection.CopyTo(Array, Int32) ICollection.CopyTo(Array, Int32)

Copia ConfigurationElementCollection in una matrice.Copies the ConfigurationElementCollection to an array.

Metodi di estensione

Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable)

Esegue il cast degli elementi di un oggetto IEnumerable nel tipo specificato.Casts the elements of an IEnumerable to the specified type.

OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable)

Filtra gli elementi di un oggetto IEnumerable in base a un tipo specificato.Filters the elements of an IEnumerable based on a specified type.

AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable)

Consente la parallelizzazione di una query.Enables parallelization of a query.

AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable)

Converte un oggetto IEnumerable in un oggetto IQueryable.Converts an IEnumerable to an IQueryable.

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