ConfigurationManager.AppSettings Eigenschaft
Definition
Wichtig
Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.
Ruft die AppSettingsSection Daten für die Standardkonfiguration der aktuellen Anwendung ab.
public:
static property System::Collections::Specialized::NameValueCollection ^ AppSettings { System::Collections::Specialized::NameValueCollection ^ get(); };
public static System.Collections.Specialized.NameValueCollection AppSettings { get; }
static member AppSettings : System.Collections.Specialized.NameValueCollection
Public Shared ReadOnly Property AppSettings As NameValueCollection
Eigenschaftswert
Der Inhalt des AppSettingsSection-Objekts für die Standardkonfiguration der aktuellen Anwendung.
Ausnahmen
Ein NameValueCollection-Objekt mit den Anwendungseinstellungsdaten konnte nicht abgerufen werden.
Beispiele
Das erste Beispiel zeigt eine einfache Konsolenanwendung, die Anwendungseinstellungen liest, eine neue Einstellung hinzufügt und eine vorhandene Einstellung aktualisiert.
using System;
using System.Configuration;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
ReadAllSettings();
ReadSetting("Setting1");
ReadSetting("NotValid");
AddUpdateAppSettings("NewSetting", "May 7, 2014");
AddUpdateAppSettings("Setting1", "May 8, 2014");
ReadAllSettings();
}
static void ReadAllSettings()
{
try
{
var appSettings = ConfigurationManager.AppSettings;
if (appSettings.Count == 0)
{
Console.WriteLine("AppSettings is empty.");
}
else
{
foreach (var key in appSettings.AllKeys)
{
Console.WriteLine("Key: {0} Value: {1}", key, appSettings[key]);
}
}
}
catch (ConfigurationErrorsException)
{
Console.WriteLine("Error reading app settings");
}
}
static void ReadSetting(string key)
{
try
{
var appSettings = ConfigurationManager.AppSettings;
string result = appSettings[key] ?? "Not Found";
Console.WriteLine(result);
}
catch (ConfigurationErrorsException)
{
Console.WriteLine("Error reading app settings");
}
}
static void AddUpdateAppSettings(string key, string value)
{
try
{
var configFile = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
var settings = configFile.AppSettings.Settings;
if (settings[key] == null)
{
settings.Add(key, value);
}
else
{
settings[key].Value = value;
}
configFile.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection(configFile.AppSettings.SectionInformation.Name);
}
catch (ConfigurationErrorsException)
{
Console.WriteLine("Error writing app settings");
}
}
}
}
Imports System.Configuration
Module Module1
Sub Main()
ReadAllSettings()
ReadSetting("Setting1")
ReadSetting("NotValid")
AddUpdateAppSettings("NewSetting", "May 7, 2014")
AddUpdateAppSettings("Setting1", "May 8, 2014")
ReadAllSettings()
End Sub
Sub ReadAllSettings()
Try
Dim appSettings = ConfigurationManager.AppSettings
If appSettings.Count = 0 Then
Console.WriteLine("AppSettings is empty.")
Else
For Each key As String In appSettings.AllKeys
Console.WriteLine("Key: {0} Value: {1}", key, appSettings(key))
Next
End If
Catch e As ConfigurationErrorsException
Console.WriteLine("Error reading app settings")
End Try
End Sub
Sub ReadSetting(key As String)
Try
Dim appSettings = ConfigurationManager.AppSettings
Dim result As String = appSettings(key)
If IsNothing(result) Then
result = "Not found"
End If
Console.WriteLine(result)
Catch e As ConfigurationErrorsException
Console.WriteLine("Error reading app settings")
End Try
End Sub
Sub AddUpdateAppSettings(key As String, value As String)
Try
Dim configFile = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)
Dim settings = configFile.AppSettings.Settings
If IsNothing(settings(key)) Then
settings.Add(key, value)
Else
settings(key).Value = value
End If
configFile.Save(ConfigurationSaveMode.Modified)
ConfigurationManager.RefreshSection(configFile.AppSettings.SectionInformation.Name)
Catch e As ConfigurationErrorsException
Console.WriteLine("Error writing app settings")
End Try
End Sub
End Module
Hinweise
Ein AppSettingsSection-Objekt enthält den Inhalt des appSettings
Abschnitts der Konfigurationsdatei.