AppSettingsSection Classe

Définition

public ref class AppSettingsSection sealed : System::Configuration::ConfigurationSection

public sealed class AppSettingsSection : System.Configuration.ConfigurationSection

type AppSettingsSection = class
    inherit ConfigurationSection

Public NotInheritable Class AppSettingsSection
Inherits ConfigurationSection

Héritage

Object

ConfigurationElement

ConfigurationSection

AppSettingsSection

Exemples

L’exemple suivant montre comment utiliser la AppSettingsSection classe dans une application console. Il lit et écrit les paires clé/valeur contenues dans la appSettings section. Il montre également comment accéder à la File propriété de la AppSettingsSection classe .

using System;
using System.Collections.Specialized;
using System.Configuration;
using System.Text;
using System.IO;

// IMPORTANT: To compile this example, you must add to the project 
// a reference to the System.Configuration assembly.
//

class UsingAppSettingsSection
{
    #region UsingAppSettingsSection

    // This function shows how to use the File property of the
    // appSettings section.
    // The File property is used to specify an auxiliary 
    // configuration file.
    // Usually you create an auxiliary file off-line to store 
    // additional settings that you can modify as needed without
    // causing an application restart,as in the case of a Web 
    // application.
    // These settings are then added to the ones defined in the
    // application configuration file.
    static void  IntializeConfigurationFile()
    {
        // Create a set of unique key/value pairs to store in
        // the appSettings section of an auxiliary configuration
        // file.
        string time1 = String.Concat(DateTime.Now.ToLongDateString(),
                               " ", DateTime.Now.ToLongTimeString());

        string time2 = String.Concat(DateTime.Now.ToLongDateString(),
                               " ", new DateTime(2009, 06, 30).ToLongTimeString());
       
        string[] buffer = {"<appSettings>",
        "<add key='AuxAppStg0' value='" + time1 + "'/>", 
        "<add key='AuxAppStg1' value='" + time2 + "'/>",
        "</appSettings>"};

        // Create an auxiliary configuration file and store the
        // appSettings defined before.
        // Note creating a file at run-time is just for demo 
        // purposes to run this example.
        File.WriteAllLines("auxiliaryFile.config", buffer);
        
        // Get the current configuration associated
        // with the application.
        System.Configuration.Configuration config =
           ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

        // Associate the auxiliary with the default
        // configuration file. 
        System.Configuration.AppSettingsSection appSettings = config.AppSettings;
        appSettings.File = "auxiliaryFile.config";
        
        // Save the configuration file.
        config.Save(ConfigurationSaveMode.Modified);

        // Force a reload in memory of the 
        // changed section.
        ConfigurationManager.RefreshSection("appSettings");
    }

    // This function shows how to write a key/value
    // pair to the appSettings section.
    static void WriteAppSettings()
    {
        try
        {
            // Get the application configuration file.
            System.Configuration.Configuration config =
               ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

            // Create a unique key/value pair to add to 
            // the appSettings section.
            string keyName = "AppStg" + config.AppSettings.Settings.Count;
            string value = string.Concat(DateTime.Now.ToLongDateString(),
                           " ", DateTime.Now.ToLongTimeString());

            // Add the key/value pair to the appSettings 
            // section.
            // config.AppSettings.Settings.Add(keyName, value);
            System.Configuration.AppSettingsSection appSettings = config.AppSettings;
            appSettings.Settings.Add(keyName, value);

            // Save the configuration file.
            config.Save(ConfigurationSaveMode.Modified);

            // Force a reload in memory of the changed section.
            // This to read the section with the
            // updated values.
            ConfigurationManager.RefreshSection("appSettings");

            Console.WriteLine(
                "Added the following Key: {0} Value: {1} .", keyName, value);
        }
        catch (Exception e)
        {
            Console.WriteLine("Exception raised: {0}",
                e.Message);
        }
    }

    // This function shows how to read the key/value
    // pairs (settings collection)contained in the 
    // appSettings section.
    static void ReadAppSettings()
    {
        try
        {

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

            // Get the appSettings section.
            System.Configuration.AppSettingsSection appSettings =
                (System.Configuration.AppSettingsSection)config.GetSection("appSettings");

            // Get the auxiliary file name.
            Console.WriteLine("Auxiliary file: {0}", config.AppSettings.File);

            // Get the settings collection (key/value pairs).
            if (appSettings.Settings.Count != 0)
            {
                foreach (string key in appSettings.Settings.AllKeys)
                {
                    string value = appSettings.Settings[key].Value;
                    Console.WriteLine("Key: {0} Value: {1}", key, value);
                }
            }
            else
            {
                Console.WriteLine("The appSettings section is empty. Write first.");
            }
        }
        catch (Exception e)
        {
            Console.WriteLine("Exception raised: {0}",
                e.Message);
        }
    }

    #endregion UsingAppSettingsSection

    #region ApplicationMain

    // This class obtains user's input and provide feedback.
    // It contains the application Main.
    class ApplicationMain
    {
        // Display user's menu.
        public static void UserMenu()
        {
            StringBuilder buffer = new StringBuilder();

            buffer.AppendLine("Please, make your selection.");
            buffer.AppendLine("1    -- Write appSettings section.");
            buffer.AppendLine("2    -- Read  appSettings section.");
            buffer.AppendLine("?    -- Display help.");
            buffer.AppendLine("Q,q  -- Exit the application.");

            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];

            IntializeConfigurationFile();

            // 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":
                        WriteAppSettings();
                        break;

                    case "2":
                        ReadAppSettings();
                        break;

                    default:
                        UserMenu();
                        break;
                }
                Console.Write("> ");
                selection = Console.ReadLine();
            }
        }
    }
    #endregion ApplicationMain
}

Imports System.Collections.Specialized
Imports System.Configuration
Imports System.Text
Imports System.IO

' IMPORTANT: To compile this example, you must add to the project 
' a reference to the System.Configuration assembly.
'

Class UsingAppSettingsSection
#Region "UsingAppSettingsSection"

    ' This function shows how to use the File property of the
    ' appSettings section.
    ' The File property is used to specify an auxiliary 
    ' configuration file.
    ' Usually you create an auxiliary file off-line to store 
    ' additional settings that you can modify as needed without
    ' causing an application restart,as in the case of a Web 
    ' application.
    ' These settings are then added to the ones defined in the
    ' application configuration file.
    Private Shared Sub IntializeConfigurationFile()
        ' Create a set of unique key/value pairs to store in
        ' the appSettings section of an auxiliary configuration
        ' file.
        Dim time1 As String = String.Concat(Date.Now.ToLongDateString(), " ", Date.Now.ToLongTimeString())

        Dim time2 As String = String.Concat(Date.Now.ToLongDateString(), " ", New Date(2009, 6, 30).ToLongTimeString())

        Dim buffer() As String = {"<appSettings>", "<add key='AuxAppStg0' value='" & time1 & "'/>", "<add key='AuxAppStg1' value='" & time2 & "'/>", "</appSettings>"}

        ' Create an auxiliary configuration file and store the
        ' appSettings defined before.
        ' Note creating a file at run-time is just for demo 
        ' purposes to run this example.
        File.WriteAllLines("auxiliaryFile.config", buffer)

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

        ' Associate the auxiliary with the default
        ' configuration file. 
        Dim appSettings As System.Configuration.AppSettingsSection = config.AppSettings
        appSettings.File = "auxiliaryFile.config"

        ' Save the configuration file.
        config.Save(ConfigurationSaveMode.Modified)

        ' Force a reload in memory of the 
        ' changed section.
        ConfigurationManager.RefreshSection("appSettings")

    End Sub

    ' This function shows how to write a key/value
    ' pair to the appSettings section.
    Private Shared Sub WriteAppSettings()
        Try
            ' Get the application configuration file.
            Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)

            ' Create a unique key/value pair to add to 
            ' the appSettings section.
            Dim keyName As String = "AppStg" & config.AppSettings.Settings.Count
            Dim value As String = String.Concat(Date.Now.ToLongDateString(), " ", Date.Now.ToLongTimeString())

            ' Add the key/value pair to the appSettings 
            ' section.
            ' config.AppSettings.Settings.Add(keyName, value);
            Dim appSettings As System.Configuration.AppSettingsSection = config.AppSettings
            appSettings.Settings.Add(keyName, value)

            ' Save the configuration file.
            config.Save(ConfigurationSaveMode.Modified)

            ' Force a reload in memory of the changed section.
            ' This to read the section with the
            ' updated values.
            ConfigurationManager.RefreshSection("appSettings")

            Console.WriteLine("Added the following Key: {0} Value: {1} .", keyName, value)
        Catch e As Exception
            Console.WriteLine("Exception raised: {0}", e.Message)
        End Try
    End Sub

    ' This function shows how to read the key/value
    ' pairs (settings collection)contained in the 
    ' appSettings section.
    Private Shared Sub ReadAppSettings()
        Try

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

            ' Get the appSettings section.
            Dim appSettings As System.Configuration.AppSettingsSection = CType(config.GetSection("appSettings"), System.Configuration.AppSettingsSection)

            ' Get the auxiliary file name.
            Console.WriteLine("Auxiliary file: {0}", config.AppSettings.File)


            ' Get the settings collection (key/value pairs).
            If appSettings.Settings.Count <> 0 Then
                For Each key As String In appSettings.Settings.AllKeys
                    Dim value As String = appSettings.Settings(key).Value
                    Console.WriteLine("Key: {0} Value: {1}", key, value)
                Next key
            Else
                Console.WriteLine("The appSettings section is empty. Write first.")
            End If
        Catch e As Exception
            Console.WriteLine("Exception raised: {0}", e.Message)
        End Try
    End Sub

#End Region ' UsingAppSettingsSection


#Region "ApplicationMain"

    Shared Sub UserMenu()
        Dim buffer As New StringBuilder()

        buffer.AppendLine("Please, make your selection.")
        buffer.AppendLine("1    -- Write appSettings section.")
        buffer.AppendLine("2    -- Read  appSettings section.")
        buffer.AppendLine("?    -- Display help.")
        buffer.AppendLine("Q,q  -- Exit the application.")

        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)

        IntializeConfigurationFile()

        ' 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"
                    WriteAppSettings()

                Case "2"
                    ReadAppSettings()

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

Imports System.Collections.Specialized
Imports System.Configuration
Imports System.Text
Imports System.IO

' IMPORTANT: To compile this example, you must add to the project 
' a reference to the System.Configuration assembly.
'

Class UsingAppSettingsSection
#Region "UsingAppSettingsSection"

    ' This function shows how to use the File property of the
    ' appSettings section.
    ' The File property is used to specify an auxiliary 
    ' configuration file.
    ' Usually you create an auxiliary file off-line to store 
    ' additional settings that you can modify as needed without
    ' causing an application restart,as in the case of a Web 
    ' application.
    ' These settings are then added to the ones defined in the
    ' application configuration file.
    Private Shared Sub IntializeConfigurationFile()
        ' Create a set of unique key/value pairs to store in
        ' the appSettings section of an auxiliary configuration
        ' file.
        Dim time1 As String = String.Concat(Date.Now.ToLongDateString(), " ", Date.Now.ToLongTimeString())

        Dim time2 As String = String.Concat(Date.Now.ToLongDateString(), " ", New Date(2009, 6, 30).ToLongTimeString())

        Dim buffer() As String = {"<appSettings>", "<add key='AuxAppStg0' value='" & time1 & "'/>", "<add key='AuxAppStg1' value='" & time2 & "'/>", "</appSettings>"}

        ' Create an auxiliary configuration file and store the
        ' appSettings defined before.
        ' Note creating a file at run-time is just for demo 
        ' purposes to run this example.
        File.WriteAllLines("auxiliaryFile.config", buffer)

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

        ' Associate the auxiliary with the default
        ' configuration file. 
        Dim appSettings As System.Configuration.AppSettingsSection = config.AppSettings
        appSettings.File = "auxiliaryFile.config"

        ' Save the configuration file.
        config.Save(ConfigurationSaveMode.Modified)

        ' Force a reload in memory of the 
        ' changed section.
        ConfigurationManager.RefreshSection("appSettings")

    End Sub

    ' This function shows how to write a key/value
    ' pair to the appSettings section.
    Private Shared Sub WriteAppSettings()
        Try
            ' Get the application configuration file.
            Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)

            ' Create a unique key/value pair to add to 
            ' the appSettings section.
            Dim keyName As String = "AppStg" & config.AppSettings.Settings.Count
            Dim value As String = String.Concat(Date.Now.ToLongDateString(), " ", Date.Now.ToLongTimeString())

            ' Add the key/value pair to the appSettings 
            ' section.
            ' config.AppSettings.Settings.Add(keyName, value);
            Dim appSettings As System.Configuration.AppSettingsSection = config.AppSettings
            appSettings.Settings.Add(keyName, value)

            ' Save the configuration file.
            config.Save(ConfigurationSaveMode.Modified)

            ' Force a reload in memory of the changed section.
            ' This to read the section with the
            ' updated values.
            ConfigurationManager.RefreshSection("appSettings")

            Console.WriteLine("Added the following Key: {0} Value: {1} .", keyName, value)
        Catch e As Exception
            Console.WriteLine("Exception raised: {0}", e.Message)
        End Try
    End Sub

    ' This function shows how to read the key/value
    ' pairs (settings collection)contained in the 
    ' appSettings section.
    Private Shared Sub ReadAppSettings()
        Try

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

            ' Get the appSettings section.
            Dim appSettings As System.Configuration.AppSettingsSection = CType(config.GetSection("appSettings"), System.Configuration.AppSettingsSection)

            ' Get the auxiliary file name.
            Console.WriteLine("Auxiliary file: {0}", config.AppSettings.File)


            ' Get the settings collection (key/value pairs).
            If appSettings.Settings.Count <> 0 Then
                For Each key As String In appSettings.Settings.AllKeys
                    Dim value As String = appSettings.Settings(key).Value
                    Console.WriteLine("Key: {0} Value: {1}", key, value)
                Next key
            Else
                Console.WriteLine("The appSettings section is empty. Write first.")
            End If
        Catch e As Exception
            Console.WriteLine("Exception raised: {0}", e.Message)
        End Try
    End Sub

#End Region ' UsingAppSettingsSection


#Region "ApplicationMain"

    Shared Sub UserMenu()
        Dim buffer As New StringBuilder()

        buffer.AppendLine("Please, make your selection.")
        buffer.AppendLine("1    -- Write appSettings section.")
        buffer.AppendLine("2    -- Read  appSettings section.")
        buffer.AppendLine("?    -- Display help.")
        buffer.AppendLine("Q,q  -- Exit the application.")

        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)

        IntializeConfigurationFile()

        ' 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"
                    WriteAppSettings()

                Case "2"
                    ReadAppSettings()

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

Remarques

La appSettings section configuration fournit des paires clé/valeur de string valeurs pour une application. Au lieu d’accéder à ces valeurs à l’aide d’un instance d’un AppSettingsSection objet, vous devez utiliser la AppSettings propriété de la ConfigurationManager classe ou la AppSettings propriété de la WebConfigurationManager classe .

Constructeurs

Propriétés

Méthodes

S’applique à

Voir aussi

• ConfigurationManager
• WebConfigurationManager