IDReferencePropertyAttribute 類別

定義

public ref class IDReferencePropertyAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Property)]
public sealed class IDReferencePropertyAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Property)>]
type IDReferencePropertyAttribute = class
    inherit Attribute

Public NotInheritable Class IDReferencePropertyAttribute
Inherits Attribute

繼承

Object

Attribute

IDReferencePropertyAttribute

屬性

AttributeUsageAttribute

範例

以下程式碼範例示範如何將屬性 IDReferencePropertyAttribute 套用到一個屬性，該屬性會評估字串。 在此範例中，DataSourceID成員識別資料來源控制，並指定類型。DataSourceControl

// This class implements a custom data source control.
public class SomeDataBoundControl : DataBoundControl
{   
    [ IDReferencePropertyAttribute(typeof(DataSourceControl)) ]        
    new public string DataSourceID {
        get {
            return base.DataSourceID;
        }
        set {
            base.DataSourceID = value;
        }
    }
}

' This class implements a custom data source control.
Public Class SomeDataBoundControl
    Inherits DataBoundControl
    
    <IDReferencePropertyAttribute(GetType(DataSourceControl))>  _
    Public Shadows Property DataSourceID() As String 
        Get
            Return MyBase.DataSourceID
        End Get
        Set
            MyBase.DataSourceID = value
        End Set
    End Property
    
End Class

備註

這個 IDReferencePropertyAttribute 類別會套用到包含 ID 參考的屬性。 ContentPlaceHolderID 是包含 ID 參考的屬性範例。 當此屬性套用時，設計者可在設計時提供額外功能，例如列出 ID。

另請參閱

• ControlIDConverter