PagedControl.ItemWeight Properti

Referensi

Definisi

Ruang nama:: System.Web.UI.MobileControls

Rakitan:: System.Web.Mobile.dll

Penting

Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.

Mendapatkan perkiraan berat satu item dalam kontrol. API ini kedaluarsa. Untuk informasi tentang cara mengembangkan aplikasi seluler ASP.NET, lihat Situs & Mobile Apps dengan 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

Nilai Properti

Int32

Perkiraan berat satu item dalam kontrol.

Contoh

Contoh kode berikut membuat dan menggunakan kontrol daftar kustom. Contoh menunjukkan cara mengambil alih ItemWeight properti List kelas untuk menentukan berat kontrol baru.

<%@ 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>

Keterangan

Nilai -1 menunjukkan bahwa bobot default untuk elemen harus digunakan. Kelas pewarisan harus mengambil alih properti ini. Untuk informasi lebih lanjut tentang mengambil alih properti ini, lihat Dukungan Penomoran Halaman.

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