ConfigurationCollectionAttribute(Type) 构造函数

定义

命名空间:
System.Configuration
程序集:
System.Configuration.ConfigurationManager.dll
程序集:
System.Configuration.dll

初始化 ConfigurationCollectionAttribute 类的新实例。Initializes a new instance of the ConfigurationCollectionAttribute class.

public:
 ConfigurationCollectionAttribute(Type ^ itemType);
public ConfigurationCollectionAttribute (Type itemType);
new System.Configuration.ConfigurationCollectionAttribute : Type -> System.Configuration.ConfigurationCollectionAttribute
Public Sub New (itemType As Type)

参数

itemType
Type

要创建的属性集合的类型。The type of the property collection to create.

例外

ArgumentNullException

itemType 上声明的默认值为 null。itemType is null.

示例

下面的示例演示如何使用 ConfigurationCollectionAttribute 。The following example shows how to use the ConfigurationCollectionAttribute.

// Declare the Urls collection property using the
// ConfigurationCollectionAttribute.
// This allows to build a nested section that contains
// a collection of elements.
[ConfigurationProperty("urls", IsDefaultCollection = false)]
[ConfigurationCollection(typeof(UrlsCollection),
    AddItemName = "add",
    ClearItemsName = "clear",
    RemoveItemName = "remove")]
public UrlsCollection Urls
{
    get
    {
        UrlsCollection urlsCollection =
            (UrlsCollection)base["urls"];
        return urlsCollection;
    }
}

' Declare the Urls collection property using the
' ConfigurationCollectionAttribute.
' This allows to build a nested section that contains
' a collection of elements.
<ConfigurationProperty("urls", IsDefaultCollection:=False),
    System.Configuration.ConfigurationCollection(GetType(UrlsCollection),
    AddItemName:="add", ClearItemsName:="clear", RemoveItemName:="remove")> _
Public ReadOnly Property Urls() As UrlsCollection
    Get
        Dim urlsCollection As UrlsCollection = CType(MyBase.Item("urls"), UrlsCollection)
        Return urlsCollection
    End Get
End Property

注解

使用此构造函数告诉 .NET Framework 要创建的属性集合的自定义类型。You use this constructor to tell the .NET Framework the custom type of the property collection to be created.

适用于