UrlPropertyAttribute 建構函式

定義

命名空間:

System.Web.UI

組件:

System.Web.dll

初始化 UrlPropertyAttribute 類別的新執行個體。

多載

UrlPropertyAttribute()	初始化 UrlPropertyAttribute 類別預設的新執行個體。
UrlPropertyAttribute(String)	初始化 UrlPropertyAttribute 類別的新執行個體，並將 Filter 屬性設定為指定字串。

UrlPropertyAttribute()

初始化 UrlPropertyAttribute 類別預設的新執行個體。

public:
 UrlPropertyAttribute();

public UrlPropertyAttribute ();

Public Sub New ()

範例

下列程式碼範例示範實作 URL 特定屬性的類別。 在此程式碼範例中，預設 UrlPropertyAttribute 屬性會套用至 TargetUrl 類別的 CustomHyperLinkControl 屬性。 屬性工作表示支援所有 URL 類型，並指定預設檔案篩選設定為 「*」。 *

public class CustomHyperLinkControl : WebControl
{
    public CustomHyperLinkControl() { }

    // The TargetUrl property represents the URL that 
    // the custom hyperlink control navigates to.
    [UrlProperty()]
    public string TargetUrl
    {
        get
        {
            string s = (string)ViewState["TargetUrl"];
            return ((s == null) ? String.Empty : s);
        }
        set
        {
            ViewState["TargetUrl"] = value;
        }
    }

    // The Text property represents the visible text that 
    // the custom hyperlink control is displayed with.        
    public virtual string Text
    {
        get
        {
            string s = (string)ViewState["Text"];
            return ((s == null) ? String.Empty : s);
        }
        set
        {
            ViewState["Text"] = value;
        }
    }

    // Implement this method to render the control.
}

Public Class CustomHyperLinkControl
    Inherits WebControl

    Public Sub New()
    End Sub

    ' The TargetUrl property represents the URL that 
    ' the custom hyperlink control navigates to.        
    <UrlProperty()> _
    Public Property TargetUrl() As String
        Get
            Dim s As String = CStr(ViewState("TargetUrl"))
            If (s Is Nothing) Then
                Return String.Empty
            Else
                Return s
            End If
        End Get
        Set(ByVal value As String)
            ViewState("TargetUrl") = value
        End Set
    End Property

    ' The Text property represents the visible text that 
    ' the custom hyperlink control is displayed with.        

    Public Overridable Property [Text]() As String
        Get
            Dim s As String = CStr(ViewState("Text"))
            If (s Is Nothing) Then
                Return String.Empty
            Else
                Return s
            End If
        End Get
        Set(ByVal value As String)
            ViewState("Text") = value
        End Set
    End Property

    ' Implement method to render the control.

End Class

備註

類別的預設實例 UrlPropertyAttribute 會初始化 Filter ，並將 屬性設定為 「*. * 」。

UrlPropertyAttribute(String)

初始化 UrlPropertyAttribute 類別的新執行個體，並將 Filter 屬性設定為指定字串。

public:
 UrlPropertyAttribute(System::String ^ filter);

public UrlPropertyAttribute (string filter);

new System.Web.UI.UrlPropertyAttribute : string -> System.Web.UI.UrlPropertyAttribute

Public Sub New (filter As String)

參數

filter

String

與 URL 特定屬性關聯的檔案篩選條件。

範例

下列程式碼範例示範實作 URL 特定屬性的類別。 在此程式碼範例中， UrlPropertyAttribute 屬性會套用至 TargetUrl 類別的 CustomHyperLinkControl 屬性。 屬性會設定 ASP.NET 檔案的特定檔案篩選。

public class CustomHyperLinkControl : WebControl
{
    public CustomHyperLinkControl() { }

    // The TargetUrl property represents the URL that 
    // the custom hyperlink control navigates to.
    [UrlProperty("*.aspx")]
    public string TargetUrl
    {
        get
        {
            string s = (string)ViewState["TargetUrl"];
            return ((s == null) ? String.Empty : s);
        }
        set
        {
            ViewState["TargetUrl"] = value;
        }
    }

    // The Text property represents the visible text that 
    // the custom hyperlink control is displayed with.        
    public virtual string Text
    {
        get
        {
            string s = (string)ViewState["Text"];
            return ((s == null) ? String.Empty : s);
        }
        set
        {
            ViewState["Text"] = value;
        }
    }

    // Implement method to render the control.
}

Public Class CustomHyperLinkControl
    Inherits WebControl

    Public Sub New()
    End Sub

    ' The TargetUrl property represents the URL that 
    ' the custom hyperlink control navigates to.        
    <UrlProperty("*.aspx")> _
    Public Property TargetUrl() As String
        Get
            Dim s As String = CStr(ViewState("TargetUrl"))
            If (s Is Nothing) Then
                Return String.Empty
            Else
                Return s
            End If
        End Get
        Set(ByVal value As String)
            ViewState("TargetUrl") = value
        End Set
    End Property

    ' The Text property represents the visible text that 
    ' the custom hyperlink control is displayed with.                
    Public Overridable Property [Text]() As String
        Get
            Dim s As String = CStr(ViewState("Text"))
            If (s Is Nothing) Then
                Return String.Empty
            Else
                Return s
            End If
        End Get
        Set(ByVal value As String)
            ViewState("Text") = value
        End Set
    End Property

    ' Implement method to render the control.

End Class

備註

使用這個建構函式建立的 UrlPropertyAttribute 類別實例會初始化 Filter ，並將 屬性設定為 filter 。