ConfigurationManager.AppSettings 属性 —转

ConfigurationManager.AppSettings 属性 

注意：此属性在 .NET Framework 2.0 版中是新增的。

命名空间:System.Configuration
程序集:System.Configuration（在 system.configuration.dll 中）

语法

Visual Basic（声明）

Public Shared ReadOnly Property AppSettings As NameValueCollection

Visual Basic（用法）

Dim value As NameValueCollection

value = ConfigurationManager.AppSettings

C#

public static NameValueCollection AppSettings { get; }

C++

public:
static property NameValueCollection^ AppSettings {
    NameValueCollection^ get ();
}

J#

/** @property */
public static NameValueCollection get_AppSettings ()

JScript

public static function get AppSettings () : NameValueCollection

 

 

属性值

返回一个 NameValueCollection 对象，该对象包含当前应用程序默认配置的 AppSettingsSection 对象的内容。

异常

异常类型	条件
ConfigurationErrorsException	无法使用应用程序设置数据检索 NameValueCollection 对象。

备注

AppSettingsSection 对象包含配置文件的 appSettings 节的内容。

示例

下面的代码示例演示如何使用 AppSettings 属性获取命名的应用程序设置。

Visual Basic

' Get appSettings.
Shared Sub GetAppSettings()
   ' Get the appSettings.
     Dim appSettings As NameValueCollection = _
     ConfigurationManager.AppSettings
   
   ' Get the collection enumerator.
     Dim appSettingsEnum As IEnumerator = _
     appSettings.Keys.GetEnumerator()
   
   ' Loop through the collection and
   ' display the appSettings key, value pairs.
   Dim i As Integer = 0
   While appSettingsEnum.MoveNext()
      Dim key As String = appSettings.Keys(i)
         Console.WriteLine("Name: {0} Value: {1}", _
         key, appSettings(key))
      i += 1
   End While
End Sub 'GetAppSettings
 

C#

// Get appSettings.
static void GetAppSettings()
{
    // Get the appSettings.
    NameValueCollection appSettings =
         ConfigurationManager.AppSettings;
    
    // Get the collection enumerator.
    IEnumerator appSettingsEnum =
        appSettings.Keys.GetEnumerator();

    // Loop through the collection and
    // display the appSettings key, value pairs.
    int i = 0;
    Console.WriteLine("App settings.");
    while (appSettingsEnum.MoveNext())
    {
        string key = appSettings.Keys[i];
        Console.WriteLine("Name: {0} Value: {1}",
        key, appSettings[key]);
        i += 1;
    }

}