PagedControl.ItemWeight Eigenschaft

  • Referenz

Definition

Namespace:
System.Web.UI.MobileControls
Assembly:
System.Web.Mobile.dll

Ruft die ungefähre Gewichtung eines einzelnen Elements im Steuerelement ab. Diese API ist veraltet. Informationen zum Entwickeln ASP.NET mobiler Anwendungen finden Sie unter Mobile Apps & Websites mit ASP.NET.

protected:
 virtual property int ItemWeight { int get(); };
protected virtual int ItemWeight { get; }
member this.ItemWeight : int
Protected Overridable ReadOnly Property ItemWeight As Integer

Eigenschaftswert

Int32

Die ungefähre Gewichtung eines einzelnen Elements im Steuerelement.

Beispiele

Im folgenden Codebeispiel wird ein benutzerdefiniertes Listensteuerelement erstellt und verwendet. Im Beispiel wird veranschaulicht, wie die ItemWeight Eigenschaft einer List Klasse überschrieben wird, um eine neue Steuerelementgewichtung anzugeben.

<%@ Page Language="C#" 
    Inherits="System.Web.UI.MobileControls.MobilePage" %>
<%@ Register TagPrefix="mobile" 
    Namespace="System.Web.UI.MobileControls" 
    Assembly="System.Web.Mobile" %>
<%@ Import Namespace="System.Security.Permissions" %>

<script runat="server">
    // A custom list control for illustration
    [AspNetHostingPermission(SecurityAction.Demand, 
        Level=AspNetHostingPermissionLevel.Minimal), 
    AspNetHostingPermission(SecurityAction.InheritanceDemand, 
        Level=AspNetHostingPermissionLevel.Minimal)]
    public class ListControl : List
    {
        public ListControl()
            : base()
        {}

        // Set a weight for the items
        protected override int ItemWeight
        {
            get { return 150; }
        }
    }

    ListControl List1;
    
    private void Page_Load(object sender, 
        System.EventArgs e)
    {
        // Instantiate the custom control
        List1 = new ListControl();
        List1.ItemCount = 20;
        List1.ID = "List1";
        List1.LoadItems += this.LoadNow;
        Form1.Controls.Add(List1);

        Form1.ControlToPaginate = List1;
    }

    // Called by the List whenever it needs new items
    private void LoadNow(object sender, 
        LoadItemsEventArgs e)
    {
        int j = e.ItemIndex;
        // You have to estimate the item size
        int estItemSize = 110;

        // Get the optimum page weight for the device
        int wt = 
            Form1.Adapter.Page.Adapter.OptimumPageWeight;
        // Get the number of items per page
        List1.ItemsPerPage = wt / estItemSize;
 
        // Build a section of the array
        ArrayList arr= new ArrayList();
        for (int i = 1; i <= e.ItemCount; i++)
        {
            int v = i + j;
            arr.Add((v.ToString() + " List Item"));
        }

        // Bind the array to the list
        List1.DataSource = arr;
        List1.DataBind();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<body>
    <mobile:Form id="Form1" runat="server" 
        Paginate="true">
        <mobile:TextView ID="TextView1" 
            Runat="server" />
    </mobile:Form>
</body>
</html>

<%@ Page Language="VB" 
    Inherits="System.Web.UI.MobileControls.MobilePage" %>
<%@ Register TagPrefix="mobile" 
    Namespace="System.Web.UI.MobileControls" 
    Assembly="System.Web.Mobile" %>
<%@ Import Namespace="System.Security.Permissions" %>

<script runat="server">
    ' A custom list control for illustration
    < _
    AspNetHostingPermission(SecurityAction.Demand, _
        Level:=AspNetHostingPermissionLevel.Minimal), _
    AspNetHostingPermission(SecurityAction.InheritanceDemand, _
        Level:=AspNetHostingPermissionLevel.Minimal)> _
    Public Class ListControl
        Inherits List

        Public Sub New()
            MyBase.New()
        End Sub

        ' Set a weight for the items
        Protected Overrides ReadOnly _
            Property ItemWeight() As Integer
            Get
                Return 150
            End Get
        End Property
    End Class

    Dim WithEvents List1 As ListControl
    
    Private Sub Page_Load(ByVal sender As Object, _
        ByVal e As EventArgs)

        ' Instantiate the custom control
        List1 = New ListControl()
        List1.ItemCount = 20
        List1.ID = "List1"
        Form1.Controls.Add(List1)

        Form1.ControlToPaginate = List1
    End Sub

    ' Called by the List whenever it needs new items
    Private Sub LoadNow(ByVal sender As Object, _
        ByVal e As LoadItemsEventArgs) _
        Handles List1.LoadItems

        Dim j As Integer = e.ItemIndex
        
        ' You have to estimate the item size
        Dim estItemSize As Integer = 110

        ' Get the optimum page weight for the device
        Dim wt As Integer = _
            Form1.Adapter.Page.Adapter.OptimumPageWeight
        ' Get the number of items per page
        List1.ItemsPerPage = wt / estItemSize
 
        ' Build a section of the array
        Dim arr As New ArrayList()
        For i As Integer = 1 To e.ItemCount
            Dim v As Integer = i + j
            arr.Add((v.ToString() + " List Item"))
        Next

        ' Bind the array to the list
        List1.DataSource = arr
        List1.DataBind()
    End Sub
</script>

<html xmlns="http:'www.w3.org/1999/xhtml" >
<body>
    <mobile:Form id="Form1" runat="server" 
        Paginate="true">
        <mobile:TextView ID="TextView1" 
            Runat="server" />
    </mobile:Form>
</body>
</html>

Hinweise

Der Wert -1 gibt an, dass die Standardgewichtung für das Element verwendet werden muss. Die erbende Klasse muss diese Eigenschaft überschreiben. Weitere Informationen zum Überschreiben dieser Eigenschaft finden Sie unter Paginierungsunterstützung.

Gilt für:

Weitere Informationen