ConfigurationPropertyAttribute.IsRequired Properti

Definisi

Ruang nama:

System.Configuration

Rakitan:

System.Configuration.ConfigurationManager.dll

Paket:

System.Configuration.ConfigurationManager v8.0.0

Sumber:

ConfigurationPropertyAttribute.cs

Mendapatkan atau menetapkan nilai yang menunjukkan apakah properti elemen yang didekorasi diperlukan.

public:
 property bool IsRequired { bool get(); void set(bool value); };

public bool IsRequired { get; set; }

member this.IsRequired : bool with get, set

Public Property IsRequired As Boolean

Nilai Properti

Boolean

true jika properti diperlukan; jika tidak, false. Default adalah false.

Contoh

Contoh berikut menunjukkan cara menggunakan DefaultValue properti .

[ConfigurationProperty("url", DefaultValue = "http://www.contoso.com",
    IsRequired = true)]
[RegexStringValidator(@"\w+:\/\/[\w.]+\S*")]
public string Url
{
    get
    {
        return (string)this["url"];
    }
    set
    {
        this["url"] = value;
    }
}

<ConfigurationProperty("url", DefaultValue:="http://www.contoso.com", IsRequired:=True), RegexStringValidator("\w+:\/\/[\w.]+\S*")>
Public Property Url() As String
    Get
        Return CStr(Me("url"))
    End Get
    Set(ByVal value As String)
        Me("url") = value
    End Set
End Property