DeviceSpecific 类

定义

public ref class DeviceSpecific : System::Web::UI::Control

[System.Web.UI.MobileControls.PersistName("DeviceSpecific")]
public class DeviceSpecific : System.Web.UI.Control

[System.Web.UI.MobileControls.PersistName("DeviceSpecific")]
[System.Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
public class DeviceSpecific : System.Web.UI.Control

[<System.Web.UI.MobileControls.PersistName("DeviceSpecific")>]
type DeviceSpecific = class
    inherit Control

[<System.Web.UI.MobileControls.PersistName("DeviceSpecific")>]
[<System.Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")>]
type DeviceSpecific = class
    inherit Control

Public Class DeviceSpecific
Inherits Control

继承

Object

Control

DeviceSpecific

属性

PersistNameAttribute ObsoleteAttribute

示例

下面的代码示例演示如何使用 DeviceSpecific 和 DeviceSpecificChoice 对象在移动窗体中创建特定于各种设备的接口。

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

<script runat="server">
    private void Form_Init(object sender, System.EventArgs e)
    {
        // Create a DeviceSpecific group for Choice elements
        DeviceSpecific devSpecific = new DeviceSpecific();

        // Create two Choice objects, one with a filter
        for (int i = 0; i < 2; i++)
        {
            DeviceSpecificChoice devChoice;
            ITemplate custTemplate;

            // Create a Choice object 
            devChoice = new DeviceSpecificChoice();
            // Only the first Choice has a filter (must be in Web.config)
            if (i == 0)
                devChoice.Filter = "isHTML32";

            // Create the header template.
            custTemplate = new CustomTemplate("HeaderTemplate");
            // Put header template in a new container
            custTemplate.InstantiateIn(new TemplateContainer());
            // Add the header template to the Choice
            devChoice.Templates.Add("HeaderTemplate", custTemplate);

            // Create the footer template
            custTemplate = new CustomTemplate("FooterTemplate");
            // Put footer template in a new container
            custTemplate.InstantiateIn(new TemplateContainer());
            // Add the footer template to the Choice
            devChoice.Templates.Add("FooterTemplate", custTemplate);

            // Add the Choice to the DeviceSpecific
            ((IParserAccessor)devSpecific).AddParsedSubObject(devChoice);
        }

        // Add the DeviceSpecific object to the form
        ((IParserAccessor)Form1).AddParsedSubObject(devSpecific);
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        System.Web.UI.MobileControls.Label lab;
        lab = (System.Web.UI.MobileControls.Label)Form1.Header.FindControl("Label1");
        if (lab == null)
            return;

        // Get the selected choice's filter name
        string filterName = 
            Form1.DeviceSpecific.SelectedChoice.Filter;
        if (filterName == "isHTML32")
            lab.Text += " - HTML32";
        else
            lab.Text += " - Default";
    }

    public class CustomTemplate : ITemplate
    {
        String templateName;

        // Constructor
        public CustomTemplate(string TemplateName)
        {
            templateName = TemplateName;
        }

        public void InstantiateIn(Control container)
        {
            if (templateName == "HeaderTemplate")
            {
                // Create a label
                System.Web.UI.MobileControls.Label lab;
                lab = new System.Web.UI.MobileControls.Label();
                lab.Text = "Header Template";
                lab.ID = "Label1";

                // Create a command
                Command cmd = new Command();
                cmd.Text = "Submit";

                // Add controls to the container
                container.Controls.Add(lab);
                container.Controls.Add(cmd);
            }
            else if (templateName == "FooterTemplate")
            {
                // Create a label
                System.Web.UI.MobileControls.Label lab;
                lab = new System.Web.UI.MobileControls.Label();
                lab.ID = "Label2";
                lab.Text = "Footer Template";

                // Add label to the container
                container.Controls.Add(lab);
            }
        }
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<body>
    <mobile:form id="Form1" runat="server" OnInit="Form_Init">
    </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" %>

<script runat="server">
    Private Sub Form_Init(ByVal sender As Object, ByVal e As EventArgs)
        ' Create a DeviceSpecific group for Choice elements
        Dim devSpecific As New DeviceSpecific()
        Dim ipa As IParserAccessor

        ' Create two Choice objects, one with a filter
        For i As Integer = 0 To 1
            Dim devChoice As DeviceSpecificChoice
            Dim custTemplate As ITemplate

            ' Create a Choice object 
            devChoice = New DeviceSpecificChoice()
            ' Only the first Choice has a filter (must be in Web.config)
            If i = 0 Then
                devChoice.Filter = "isHTML32"

                ' Create the header template.
                custTemplate = New CustomTemplate("HeaderTemplate")
                ' Put header template in a new container
                custTemplate.InstantiateIn(New TemplateContainer())
                ' Add the header template to the Choice
                devChoice.Templates.Add("HeaderTemplate", custTemplate)

                ' Create the footer template
                custTemplate = New CustomTemplate("FooterTemplate")
                ' Put footer template in a new container
                custTemplate.InstantiateIn(New TemplateContainer())
                ' Add the footer template to the Choice
                devChoice.Templates.Add("FooterTemplate", custTemplate)
            End If
            
            ' Add the Choice to the DeviceSpecific
            ipa = CType(devSpecific, IParserAccessor)
            ipa.AddParsedSubObject(devChoice)
        Next

        ' Add the DeviceSpecific object to the form
        ipa = CType(Form1, IParserAccessor)
        ipa.AddParsedSubObject(devSpecific)
    End Sub

    Protected Sub Page_Load(ByVal sender As Object, _
        ByVal e As EventArgs)

        Dim lab As System.Web.UI.MobileControls.Label
        lab = CType(Form1.Header.FindControl("Label1"), _
            System.Web.UI.MobileControls.Label)
        If IsNothing(lab) Then Return

        ' Get the selected choice's filter name
        Dim filterName As String = _
        Form1.DeviceSpecific.SelectedChoice.Filter
        If filterName = "isHTML32" Then
            lab.Text += " - HTML32"
        Else
            lab.Text += " - Default"
        End If
    End Sub

    Public Class CustomTemplate
        Implements ITemplate
        Dim templName As String

        ' Constructor
        Public Sub New(ByVal TemplateName As String)
            templName = TemplateName
        End Sub

        Public Sub InstantiateIn(ByVal container As Control) _
            Implements ITemplate.InstantiateIn
            
            If templName = "HeaderTemplate" Then
                ' Create a label
                Dim lab As New System.Web.UI.MobileControls.Label
                lab.Text = "Header Template"
                lab.ID = "Label1"

                ' Create a command
                Dim cmd As New Command()
                cmd.Text = "Submit"

                ' Add controls to the container
                container.Controls.Add(lab)
                container.Controls.Add(cmd)
            
            ElseIf templName = "FooterTemplate" Then
                ' Create a label
                Dim lab As System.Web.UI.MobileControls.Label
                lab = New System.Web.UI.MobileControls.Label()
                lab.ID = "Label2"
                lab.Text = "Footer Template"

                ' Add label to the container
                container.Controls.Add(lab)
            End If
        End Sub
    End Class

</script>

<html xmlns="http:'www.w3.org/1999/xhtml" >
<body>
    <mobile:form id="Form1" runat="server" 
        OnInit="Form_Init">
    </mobile:form>
</body>
</html>

上述所有代码都可以以声明方式替换为以下标记：

对于这些示例，Web.config 文件必须具有以下元素：

注解

<在 DeviceSpecific> 元素中，通常指定一个或多个 <Choice> 元素，每个元素都包含指定如何根据目标设备功能评估选择的属性。 在运行时，将按顺序计算每个选项，并使用成功计算的第一个选项。 DeviceSpecific/Choice 构造用于指定模板集和替代属性;例如，它可用于为 Image 控件指定特定于设备的映像。

构造函数

属性

方法

事件

显式接口实现

扩展方法

适用于

另请参阅

• Choices
• <DeviceSpecific> 元素
• <Choice> 元素
• DeviceSpecific 控件简介