AppSettingsSection 类
定义
重要
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为 appSettings 配置节提供配置系统支持。 此类不能被继承。
public ref class AppSettingsSection sealed : System::Configuration::ConfigurationSectionpublic sealed class AppSettingsSection : System.Configuration.ConfigurationSectiontype AppSettingsSection = class
inherit ConfigurationSectionPublic NotInheritable Class AppSettingsSection
Inherits ConfigurationSection- 继承
示例
以下示例演示如何在控制台应用程序中使用 AppSettingsSection 类。 它读取和写入 节中包含的 appSettings 键/值对。 它还演示如何访问 File 类的 AppSettingsSection 属性。
注意
在编译此代码之前，请在项目中添加引用以 System.Configuration.dll。
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
注解
配置 appSettings 部分提供应用程序的值的键/值对 string 。 不应使用 对象的实例 AppSettingsSection 访问这些值，而应使用 AppSettings 类的 ConfigurationManager 属性或 AppSettings 类的 WebConfigurationManager 属性。
构造函数
| AppSettingsSection() |
初始化 AppSettingsSection 类的新实例。 |
属性
方法
适用于
另请参阅
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