ElementInformation.IsPresent 屬性

定義

命名空間:

System.Configuration

組件:

System.Configuration.ConfigurationManager.dll

套件:

System.Configuration.ConfigurationManager v8.0.0

來源:

ElementInformation.cs

取得值，指出關聯的 ConfigurationElement 物件是否在組態檔中。

public:
 property bool IsPresent { bool get(); };

public bool IsPresent { get; }

member this.IsPresent : bool

Public ReadOnly Property IsPresent As Boolean

屬性值

Boolean

如果關聯的 ConfigurationElement 物件在組態檔中，則為 true，否則為 false。

範例

下列範例將示範如何使用 IsPresent 屬性。

static public void IsElementPresent()
{
    // Get the current configuration file.
    System.Configuration.Configuration config =
            ConfigurationManager.OpenExeConfiguration(
            ConfigurationUserLevel.None);

    // Get the section.
    UrlsSection section =
        (UrlsSection)config.GetSection("MyUrls");

    // Get the element.
    UrlConfigElement url = section.Simple;

    bool isPresent =
        url.ElementInformation.IsPresent;
    Console.WriteLine("Url element is present? {0}",
        isPresent.ToString());
}

Public Shared Sub IsElementPresent() 

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

    ' Get the section.
    Dim section As UrlsSection = _
    CType(config.GetSection("MyUrls"), UrlsSection)
    
    ' Get the element.
    Dim url As UrlConfigElement = _
    section.Simple
    
    Dim isPresent As Boolean = _
    url.ElementInformation.IsPresent
    Console.WriteLine("Url element is present? {0}", _
    isPresent.ToString())

End Sub