ParseChildrenAttribute コンストラクタ ()とは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

ParseChildrenAttribute コンストラクタ ()

ParseChildrenAttribute クラスの新しいインスタンスを初期化します。

名前空間: System.Web.UI
アセンブリ: System.Web (system.web.dll 内)
構文

Visual Basic (宣言)

Public Sub New

Visual Basic (使用法)

Dim instance As New ParseChildrenAttribute

public ParseChildrenAttribute ()

C++

public:
ParseChildrenAttribute ()

public ParseChildrenAttribute ()

JScript

public function ParseChildrenAttribute ()

解説

ChildrenAsProperties プロパティが false の ParseChildrenAttribute クラスの新しいインスタンスが作成されます。

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
ParseChildrenAttribute クラス
ParseChildrenAttribute メンバ
System.Web.UI 名前空間
ChildrenAsProperties

ParseChildrenAttribute コンストラクタ (Boolean)

ChildrenAsProperties プロパティを使用してサーバーコントロール内の要素をサーバーコントロールのプロパティとして解析するかどうかを決定する ParseChildrenAttribute クラスの新しいインスタンスを初期化します。

名前空間: System.Web.UI
アセンブリ: System.Web (system.web.dll 内)
構文

Visual Basic (宣言)

Public Sub New ( _
    childrenAsProperties As Boolean _
)

Visual Basic (使用法)

Dim childrenAsProperties As Boolean

Dim instance As New ParseChildrenAttribute(childrenAsProperties)

public ParseChildrenAttribute (
    bool childrenAsProperties
)

C++

public:
ParseChildrenAttribute (
    bool childrenAsProperties
)

public ParseChildrenAttribute (
    boolean childrenAsProperties
)

JScript

public function ParseChildrenAttribute (
    childrenAsProperties : boolean
)

パラメータ

childrenAsProperties: 要素をサーバーコントロールのプロパティとして解析する場合は true。それ以外の場合は false。

解説

childrenAsProperties が false の場合、サーバーコントロール内の要素はコントロールとして解析されます。false は ParseChildrenAttribute の既定値です。

使用例

このセクションには、2 つのコード例が含まれています。最初のコード例では、ParseChildrenAttribute クラスのプロパティを設定する方法を示します。2 番目のコード例では、ASP.NET ページでクラスを使用する方法を示します。

次のコード例では、CollectionPropertyControl というカスタムサーバーコントロールの ParseChildrenAttribute オブジェクトを設定する方法を示します。CollectionPropertyControl を定義するクラスの前に ParseChildrenAttribute が宣言され、ParseChildrenAttribute が ChildrenAsProperties プロパティを true に設定しています。

Visual Basic

Imports System
Imports System.Collections
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Security.Permissions

Namespace Samples.AspNet.VB.Controls

    ' Create a class that will be rendered as a child of the control
    ' that has the ParseChildren attribute applied to it.
    <AspNetHostingPermission(SecurityAction.Demand, _
      Level:=AspNetHostingPermissionLevel.Minimal)> _
    Public NotInheritable Class
 Employee
        Private _name As String
        Private _title As String
        Private _alias As String


        Public Sub New()
            Me.New("", "",
 "")
        End Sub 'New


        Public Sub New(ByVal
 name As String, ByVal
 title As String, ByVal employeeAlias As String)
            Me._name = name
            Me._title = title
            Me._alias = employeeAlias
        End Sub 'New

        Public Property Name() As
 String
            Get
                Return _name
            End Get
            Set(ByVal value As
 String)
                _name = Value
            End Set
        End Property


        Public Property Title() As
 String
            Get
                Return _title
            End Get
            Set(ByVal value As
 String)
                _title = Value
            End Set
        End Property


        Public Property [Alias]() As
 String
            Get
                Return _alias
            End Get
            Set(ByVal value As
 String)
                _alias = Value
            End Set
        End Property
    End Class 'Employee

    ' Use this Boolean version of the ParseChildrenAttribute constructor
    ' to set the ChildrenAsProperties property to true. Any properties
 of the
    ' the CollectionPropertyControl custom control will be used as parsable
    ' children.
    <ParseChildren(True)> _
    <AspNetHostingPermission(SecurityAction.Demand, _
       Level:=AspNetHostingPermissionLevel.Minimal)> _
    Public NotInheritable Class
 CollectionPropertyControl
        Inherits Control
        Private _header As String
        Private _employees As New
 ArrayList()


        Public Property Header() As
 String
            Get
                Return _header
            End Get
            Set(ByVal value As
 String)
                _header = Value
            End Set
        End Property




        Public ReadOnly Property
 Employees() As ArrayList
            Get
                Return _employees
            End Get
        End Property

        ' Override the CreateChildControls method to 
        ' add child controls to the Employees property when this
        ' custom control is requested from a page.
        Protected Overrides Sub
 CreateChildControls()
            Dim label As New
 Label()
            label.Text = Header
            label.BackColor = System.Drawing.Color.Beige
            label.ForeColor = System.Drawing.Color.Red
            Controls.Add(label)
            Controls.Add(New LiteralControl("<BR>
 <BR>"))

            Dim table As New
 Table()
            Dim htr As New
 TableRow()

            Dim hcell1 As New
 TableHeaderCell()
            hcell1.Text = "Name"
            htr.Cells.Add(hcell1)

            Dim hcell2 As New
 TableHeaderCell()
            hcell2.Text = "Title"
            htr.Cells.Add(hcell2)

            Dim hcell3 As New
 TableHeaderCell()
            hcell3.Text = "Alias"
            htr.Cells.Add(hcell3)
            table.Rows.Add(htr)

            table.BorderWidth = Unit.Pixel(2)
            table.BackColor = System.Drawing.Color.Beige
            table.ForeColor = System.Drawing.Color.Red
            Dim employee As Employee
            For Each employee In
 Employees
                Dim tr As New
 TableRow()

                Dim cell1 As New
 TableCell()
                cell1.Text = employee.Name
                tr.Cells.Add(cell1)

                Dim cell2 As New
 TableCell()
                cell2.Text = employee.Title
                tr.Cells.Add(cell2)

                Dim cell3 As New
 TableCell()
                cell3.Text = employee.Alias
                tr.Cells.Add(cell3)

                table.Rows.Add(tr)
            Next employee
            Controls.Add(table)
        End Sub 'CreateChildControls
 
    End Class 'CollectionPropertyControl
End Namespace ' ParseChildrenSampleVB_2

using System;
using System.Collections;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Security.Permissions;

namespace Samples.AspNet.CS.Controls
{
   // Create a class that will be rendered as a child of the control
   // that has the ParseChildren attribute applied to it.
   [AspNetHostingPermission(SecurityAction.Demand, 
      Level=AspNetHostingPermissionLevel.Minimal)]
   public sealed class Employee
   {
      private String name;
      private String title;
      private String alias;

      public Employee():this (""
,"",""){}
      
      public Employee (String name, String title, String alias)
      {
         this.name = name;
         this.title = title;
         this.alias = alias;
      }
      public String Name
      {
         get
         {
            return name;
         }
         set
         {
            name = value;
         }
      }
      
      public String Title
      {
         get
         {
            return title;
         }
         set
         {
            title = value;
         }
      }
      
      public String Alias
      {
         get
         {
            return alias;
         }
         set
         {
            alias = value;
         }
      }
   }
   // Use this Boolean version of the ParseChildrenAttribute constructor
   // to set the ChildrenAsProperties property to true. Any properties
 of the
   // the CollectionPropertyControl custom control will be used as parsable
   // children.
   [ParseChildren(true)]
   [AspNetHostingPermission(SecurityAction.Demand, 
      Level=AspNetHostingPermissionLevel.Minimal)]
   public sealed class CollectionPropertyControl
 : Control
   {  
      private String header;
      private ArrayList employees = new ArrayList();
      
      public String Header
      {
         get
         {
            return header;
         }
         set
         {
            header = value;
         }
      }


      
      public ArrayList Employees
      {
         get 
         {
            return employees;
         }
      }

      // Override the CreateChildControls method to 
      // add child controls to the Employees property when this
      // custom control is requested from a page.
      protected override void CreateChildControls()
      {
         Label label = new Label();
         label.Text = Header;
         label.BackColor = System.Drawing.Color.Beige;
         label.ForeColor = System.Drawing.Color.Red;
         Controls.Add(label);
         Controls.Add(new LiteralControl("<BR> <BR>"));

         Table table = new Table();
         TableRow htr = new TableRow();

         TableHeaderCell hcell1 = new TableHeaderCell();    
         hcell1.Text = "Name";
         htr.Cells.Add(hcell1);

         TableHeaderCell hcell2 = new TableHeaderCell();
         hcell2.Text = "Title";
         htr.Cells.Add(hcell2);
         
         TableHeaderCell hcell3 = new TableHeaderCell();
         hcell3.Text = "Alias";
         htr.Cells.Add(hcell3);
         table.Rows.Add(htr);

         table.BorderWidth = 2;
         table.BackColor = System.Drawing.Color.Beige;
         table.ForeColor = System.Drawing.Color.Red;
         foreach (Employee employee in Employees)
         {
            TableRow tr = new TableRow();

            TableCell cell1 = new TableCell();
            cell1.Text = employee.Name;
            tr.Cells.Add(cell1);
            
            TableCell cell2 = new TableCell();
            cell2.Text = employee.Title;
            tr.Cells.Add(cell2);
            
            TableCell cell3 = new TableCell();
            cell3.Text = employee.Alias;
            tr.Cells.Add(cell3);
            
            table.Rows.Add(tr);
         }
         Controls.Add(table);
         
      }
   }
}

package ParseChildrenSamples_2;
// Create a namespace that defines two classes, one a custom control,
 Employee,
// which is created for every instance of a child element with its name
// declared in a page associated with this namespace, the other, Employees
,
// which contains these child elements.
import System.*;
import System.Collections.*;
import System.Web.*;
import System.Web.UI.*;
import System.Web.UI.WebControls.*;

// Create a class that will be rendered as a child of the control
// that has the ParseChildren attribute applied to it.
public class Employee
{
    private String name;
    private String title;
    private String alias;

    public Employee()
    {
        this("", "", "");
    } //Employee

    public Employee(String name, String title, String alias)
    {
        this.name = name;
        this.title = title;
        this.alias = alias;
    } //Employee

    /** @property 
     */
    public String get_Name()
    {
        return name;
    } //get_Name

    /** @property 
     */
    public void set_Name(String value)
    {
        name = value;
    } //set_Name

    /** @property 
     */
    public String get_Title()
    {
        return title;
    } //get_Title

    /** @property 
     */
    public void set_Title(String value)
    {
        title = value;
    } //set_Title

    /** @property *
     */
    public String get_Alias()
    {
        return alias;
    } //get_Alias

    /** @property 
     */
    public void set_Alias(String value)
    {
        alias = value;
    } //set_Alias
} //Employee

// Use this Boolean version of the ParseChildrenAttribute constructor
// to set the ChildrenAsProperties property to true. Any properties
 of the
// the CollectionPropertyControl custom control will be used as parsable
// children.
/** @attribute ParseChildren(true)
 */
public class CollectionPropertyControl extends
 Control
{
    private String header;
    private ArrayList employees = new ArrayList();

    /** @property 
     */
    public String get_Header()
    {
        return header;
    } //get_Header

    /** @property 
     */
    public void set_Header(String value)
    {
        header = value;
    } //set_Header

    /** @property 
     */
    public ArrayList get_Employees()
    {
        return employees;
    } //get_Employees

    // Override the CreateChildControls method to 
    // add child controls to the Employees property when this
    // custom control is requested from a page.
    protected void CreateChildControls()
    {
        Label label = new Label();
        label.set_Text(get_Header());
        label.set_BackColor(System.Drawing.Color.get_Beige());
        label.set_ForeColor(System.Drawing.Color.get_Red());
        get_Controls().Add(label);
        get_Controls().Add(new LiteralControl("<BR>
 <BR>"));

        Table table = new Table();
        TableRow htr = new TableRow();

        TableHeaderCell hCell1 = new TableHeaderCell();
        hCell1.set_Text("Name");
        htr.get_Cells().Add(hCell1);

        TableHeaderCell hCell2 = new TableHeaderCell();
        hCell2.set_Text("Title");
        htr.get_Cells().Add(hCell2);

        TableHeaderCell hCell3 = new TableHeaderCell();
        hCell3.set_Text("Alias");
        htr.get_Cells().Add(hCell3);
        table.get_Rows().Add(htr);

        table.set_BorderWidth(new Unit(2));
        table.set_BackColor(System.Drawing.Color.get_Beige());
        table.set_ForeColor(System.Drawing.Color.get_Red());
        Employee employee = null;
        for (int iCtr = 0; iCtr < get_Employees().get_Count();
 iCtr++) {
            employee = (Employee)get_Employees().get_Item(iCtr);
            TableRow tr = new TableRow();

            TableCell cell1 = new TableCell();
            cell1.set_Text(employee.get_Name());
            tr.get_Cells().Add(cell1);

            TableCell cell2 = new TableCell();
            cell2.set_Text(employee.get_Title());
            tr.get_Cells().Add(cell2);

            TableCell cell3 = new TableCell();
            cell3.set_Text(employee.get_Alias());
            tr.get_Cells().Add(cell3);

            table.get_Rows().Add(tr);
        }
        get_Controls().Add(table);
    } //CreateChildControls 
} //CollectionPropertyControl

次のコード例では、CollectionPropertyControl クラスと Employee クラスを ASP.NET ページで使用する方法を示します。Employee クラスの 1 つのインスタンスが宣言で追加され、もう 1 つのインスタンスがプログラムで追加されます。

Visual Basic

<%@ Page Language="VB" %>
<%@ Register TagPrefix="AspSample" Assembly="Samples.AspNet.VB.Controls"
 Namespace="Samples.AspNet.VB.Controls"
 %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML
 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
  
  Protected Sub Page_Load(ByVal
 sender As Object, ByVal
 e As System.EventArgs)
    
    ' Create a new employee object and add it to custom control.
    Dim e1 As New Employee("Employee
 2", "Title 2", "Alias
 2")
    CollectionPropertyControl1.Employees.Add(e1)

    ' Verify attribute values.
    Dim p As ParseChildrenAttribute = _
    Attribute.GetCustomAttribute(GetType(CollectionPropertyControl),
 _
    GetType(ParseChildrenAttribute))

    Dim sb As New StringBuilder()
    sb.Append("The ChildControlType property is "
 & p.ChildControlType.ToString() & "<br>")
    sb.Append("The ChildrenAsProperties property is "
 & p.ChildrenAsProperties.ToString() & "<br>")
    sb.Append("The IsDefaultAttribute method returns "
 & p.IsDefaultAttribute().ToString())
    Message.Text = sb.ToString()

  End Sub
</script>

<html  >
<head id="Head1" runat="server">
    <title>PersistChildrenAttribute</title>
</head>
<body>
    <form id="Form1" runat="server">
    <div>
      <asp:Label ID="Message"
                 runat="server"/>
      <AspSample:CollectionPropertyControl id="CollectionPropertyControl1"
 
                                           runat="server">
      <Employees>
        <AspSample:Employee Name="Employee 1" 
                            Title="Title 1" 
                            Alias="Alias 1"
 />
      </Employees>
      </AspSample:CollectionPropertyControl>
    </div>
    </form>
</body>
</html>

<%@ Page Language="C#" %>
<%@ Register TagPrefix="AspSample" Assembly="Samples.AspNet.CS.Controls"
 Namespace="Samples.AspNet.CS.Controls" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

  protected void Page_Load(object sender, EventArgs
 e)
  {
    // Create a new employee object and add it to the custom control.
    Employee e1 = new Employee("Employee 2", "Title
 2", "Alias 2");
    CollectionPropertyControl1.Employees.Add(e1);

    // Verify attribute values.
    ParseChildrenAttribute p = 
      (ParseChildrenAttribute)Attribute.GetCustomAttribute(typeof(CollectionPropertyControl)
,
      typeof(ParseChildrenAttribute));

    StringBuilder sb = new StringBuilder();
    sb.Append("The ChildControlType property is " + p.ChildControlType.ToString()
 + "<br>");
    sb.Append("The ChildrenAsProperties property is " + p.ChildrenAsProperties.ToString()
 + "<br>");
    sb.Append("The IsDefaultAttribute method returns " + p.IsDefaultAttribute().ToString());
    Message.Text = sb.ToString();

  }
</script>

<html  >
<head runat="server">
    <title>ParseChildrenAttribute Example</title>
</head>
<body>
    <form runat="server">
    <div>
      <asp:Label ID="Message"
                 runat="server"/>
      <AspSample:CollectionPropertyControl id="CollectionPropertyControl1"
 
                                           runat="server">
      <Employees>
        <AspSample:Employee Name="Employee 1" 
                            Title="Title 1" 
                            Alias="Alias 1" />
      </Employees>
      </AspSample:CollectionPropertyControl>    
    </div>
    </form>
</body>
</html>

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
ParseChildrenAttribute クラス
ParseChildrenAttribute メンバ
System.Web.UI 名前空間
ChildrenAsProperties

ParseChildrenAttribute コンストラクタ (Type)

メモ : このコンストラクタは、.NET Framework version 2.0 で新しく追加されたものです。

ChildControlType プロパティを使用してコントロールとして解析するサーバーコントロール内の要素を決定する ParseChildrenAttribute クラスの新しいインスタンスを初期化します。

名前空間: System.Web.UI
アセンブリ: System.Web (system.web.dll 内)
構文

Visual Basic (宣言)

Public Sub New ( _
    childControlType As Type _
)

Visual Basic (使用法)

Dim childControlType As Type

Dim instance As New ParseChildrenAttribute(childControlType)

public ParseChildrenAttribute (
    Type childControlType
)

C++

public:
ParseChildrenAttribute (
    Type^ childControlType
)

public ParseChildrenAttribute (
    Type childControlType
)

JScript

public function ParseChildrenAttribute (
    childControlType : Type
)

パラメータ

childControlType: プロパティとして解析するコントロールのタイプ。

例外

例外の種類	条件
ArgumentNullException	childControlType が null 参照 (Visual Basic では Nothing) です。

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

バージョン情報

.NET Framework
サポート対象 : 2.0

参照

関連項目
ParseChildrenAttribute クラス
ParseChildrenAttribute メンバ
System.Web.UI 名前空間
ParseChildrenAttribute

ParseChildrenAttribute コンストラクタ (Boolean, String)

childrenAsProperties パラメータと defaultProperty パラメータを使用して、ParseChildrenAttribute クラスの新しいインスタンスを初期化します。

名前空間: System.Web.UI
アセンブリ: System.Web (system.web.dll 内)
構文

Visual Basic (宣言)

Public Sub New ( _
    childrenAsProperties As Boolean, _
    defaultProperty As String _
)

Visual Basic (使用法)

Dim childrenAsProperties As Boolean
Dim defaultProperty As String

Dim instance As New ParseChildrenAttribute(childrenAsProperties,
 defaultProperty)

public ParseChildrenAttribute (
    bool childrenAsProperties,
    string defaultProperty
)

C++

public:
ParseChildrenAttribute (
    bool childrenAsProperties, 
    String^ defaultProperty
)

public ParseChildrenAttribute (
    boolean childrenAsProperties, 
    String defaultProperty
)

JScript

public function ParseChildrenAttribute (
    childrenAsProperties : boolean, 
    defaultProperty : String
)

パラメータ

childrenAsProperties: 要素をサーバーコントロールのプロパティとして解析する場合は true。それ以外の場合は false。

defaultProperty: 既定で入れ子の内容を解析した結果が格納される、サーバーコントロールのコレクションプロパティを定義する文字列。

解説

childrenAsProperties が false の場合、要素はコントロールとして解析されます。

使用例

次のコード例では、CollectionPropertyControl というカスタムサーバーコントロールの ParseChildrenAttribute オブジェクトを設定する方法を示します。ParseChildrenAttribute は ChildrenAsProperties プロパティを true に設定し、DefaultProperty プロパティを Employee クラスに設定しています。

Visual Basic

' Use the ParseChildren attribute to set the ChildrenAsProperties
' and DefaultProperty properties. Using this constructor, the
' control parses all child controls as properties and must define
' a public property named Employees, which it declares as
' an ArrayList. Nested (child) elements must correspond to
' child elements of the Employees property or to other
' properties of the control.   
<ParseChildren(True, "Employees")>
 _
<AspNetHostingPermission(SecurityAction.Demand, _
   Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class
 CollectionPropertyControl
    Inherits Control
    Private _header As String
    Private _employees As New
 ArrayList()


    Public Property Header() As
 String
        Get
            Return _header
        End Get
        Set(ByVal value As
 String)
            _header = Value
        End Set
    End Property




    Public ReadOnly Property
 Employees() As ArrayList
        Get
            Return _employees
        End Get
    End Property

    ' Override the CreateChildControls method to 
    ' add child controls to the Employees property when this
    ' custom control is requested from a page.
    Protected Overrides Sub
 CreateChildControls()
        Dim label As New
 Label()
        label.Text = Header
        label.BackColor = System.Drawing.Color.Beige
        label.ForeColor = System.Drawing.Color.Red
        Controls.Add(label)
        Controls.Add(New LiteralControl("<BR>
 <BR>"))

        Dim table As New
 Table()
        Dim htr As New TableRow()

        Dim hcell1 As New
 TableHeaderCell()
        hcell1.Text = "Name"
        htr.Cells.Add(hcell1)

        Dim hcell2 As New
 TableHeaderCell()
        hcell2.Text = "Title"
        htr.Cells.Add(hcell2)

        Dim hcell3 As New
 TableHeaderCell()
        hcell3.Text = "Alias"
        htr.Cells.Add(hcell3)
        table.Rows.Add(htr)

        table.BorderWidth = Unit.Pixel(2)
        table.BackColor = System.Drawing.Color.Beige
        table.ForeColor = System.Drawing.Color.Red
        Dim employee As Employee
        For Each employee In
 Employees
            Dim tr As New
 TableRow()

            Dim cell1 As New
 TableCell()
            cell1.Text = employee.Name
            tr.Cells.Add(cell1)

            Dim cell2 As New
 TableCell()
            cell2.Text = employee.Title
            tr.Cells.Add(cell2)

            Dim cell3 As New
 TableCell()
            cell3.Text = employee.Alias
            tr.Cells.Add(cell3)

            table.Rows.Add(tr)
        Next employee
        Controls.Add(table)
    End Sub 'CreateChildControls
 
End Class

// Use the ParseChildren attribute to set the ChildrenAsProperties
// and DefaultProperty properties. Using this constructor, the
// control parses all child controls as properties and must define
// a public property named Employees, which it declares as
// an ArrayList. Nested (child) elements must correspond to
// child elements of the Employees property or to other
// properties of the control.  
[ParseChildren(true, "Employees")]
[AspNetHostingPermission(SecurityAction.Demand, 
   Level=AspNetHostingPermissionLevel.Minimal)]
public sealed class CollectionPropertyControl
 : Control
{  
   private String header;
   private ArrayList employees = new ArrayList();
   
   public String Header
   {
      get
      {
         return header;
      }
      set
      {
         header = value;
      }
   }


   
   public ArrayList Employees
   {
      get 
      {
         return employees;
      }
   }
   // Override the CreateChildControls method to 
   // add child controls to the Employees property when this
   // custom control is requested from a page.
   protected override void CreateChildControls()
   {
      Label label = new Label();
      label.Text = Header;
      label.BackColor = System.Drawing.Color.Beige;
      label.ForeColor = System.Drawing.Color.Red;
      Controls.Add(label);
      Controls.Add(new LiteralControl("<BR> <BR>"));

      Table table = new Table();
      TableRow htr = new TableRow();

      TableHeaderCell hcell1 = new TableHeaderCell();    
      hcell1.Text = "Name";
      htr.Cells.Add(hcell1);

      TableHeaderCell hcell2 = new TableHeaderCell();
      hcell2.Text = "Title";
      htr.Cells.Add(hcell2);
      
      TableHeaderCell hcell3 = new TableHeaderCell();
      hcell3.Text = "Alias";
      htr.Cells.Add(hcell3);
      table.Rows.Add(htr);

      table.BorderWidth = 2;
      table.BackColor = System.Drawing.Color.Beige;
      table.ForeColor = System.Drawing.Color.Red;
      foreach (Employee employee in Employees)
      {
         TableRow tr = new TableRow();

         TableCell cell1 = new TableCell();
         cell1.Text = employee.Name;
         tr.Cells.Add(cell1);
         
         TableCell cell2 = new TableCell();
         cell2.Text = employee.Title;
         tr.Cells.Add(cell2);
         
         TableCell cell3 = new TableCell();
         cell3.Text = employee.Alias;
         tr.Cells.Add(cell3);
         
         table.Rows.Add(tr);
      }
      Controls.Add(table);
      
   }
}

// Use the ParseChildren attribute to set the ChildrenAsProperties
// and DefaultProperty properties. Using this constructor, the
// control parses all child controls as properties and must define
// a public property named Employees, which it declares as
// an ArrayList. Nested (child) elements must correspond to
// child elements of the Employees property or to other
// properties of the control.   
/** @attribute ParseChildren(true, "Employees")
 */
public class CollectionPropertyControl extends
 Control
{
    private String header;
    private ArrayList employees = new ArrayList();

    /** @property 
     */
    public String get_Header()
    {
        return header;
    } //get_Header

    /** @property 
     */
    public void set_Header(String value)
    {
        header = value;
    } //set_Header

    /** @property 
     */
    public ArrayList get_Employees()
    {
        return employees;
    } //get_Employees

    // Override the CreateChildControls method to 
    // add child controls to the Employees property when this
    // custom control is requested from a page.
    protected void CreateChildControls()
    {
        Label label = new Label();
        label.set_Text(get_Header());
        label.set_BackColor(System.Drawing.Color.get_Beige());
        label.set_ForeColor(System.Drawing.Color.get_Red());
        get_Controls().Add(label);
        get_Controls().Add(new LiteralControl("<BR>
 <BR>"));

        Table table = new Table();
        TableRow htr = new TableRow();

        TableHeaderCell hCell1 = new TableHeaderCell();
        hCell1.set_Text("Name");
        htr.get_Cells().Add(hCell1);

        TableHeaderCell hCell2 = new TableHeaderCell();
        hCell2.set_Text("Title");
        htr.get_Cells().Add(hCell2);

        TableHeaderCell hCell3 = new TableHeaderCell();
        hCell3.set_Text("Alias");
        htr.get_Cells().Add(hCell3);
        table.get_Rows().Add(htr);

        table.set_BorderWidth(new Unit(2));
        table.set_BackColor(System.Drawing.Color.get_Beige());
        table.set_ForeColor(System.Drawing.Color.get_Red());
        Employee employee = null;
        for (int iCtr = 0; iCtr < get_Employees().get_Count();
 iCtr++) {
            employee = (Employee)get_Employees().get_Item(iCtr);
            TableRow tr = new TableRow();

            TableCell cell1 = new TableCell();
            cell1.set_Text(employee.get_Name());
            tr.get_Cells().Add(cell1);

            TableCell cell2 = new TableCell();
            cell2.set_Text(employee.get_Title());
            tr.get_Cells().Add(cell2);

            TableCell cell3 = new TableCell();
            cell3.set_Text(employee.get_Alias());
            tr.get_Cells().Add(cell3);

            table.get_Rows().Add(tr);
        }
        get_Controls().Add(table);
    } //CreateChildControls 
} //CollectionPropertyControl

次のコード例では、CollectionPropertyControl クラスと Employee クラスを ASP.NET ページで使用する方法を示します。

Visual Basic

<%@ Page Language="VB" %>
<%@ Register TagPrefix="AspSample" Assembly="Samples.AspNet.VB.Controls"
 Namespace="Samples.AspNet.VB.Controls"
 %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML
 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
  
  Protected Sub Page_Load(ByVal
 sender As Object, ByVal
 e As System.EventArgs)
    
    ' Verify attribute values.
    Dim p As ParseChildrenAttribute = _
    Attribute.GetCustomAttribute(GetType(CollectionPropertyControl),
 _
    GetType(ParseChildrenAttribute))

    Dim sb As New StringBuilder()
    sb.Append("The DefaultProperty property is " &
 p.DefaultProperty.ToString() & "<br>")
    sb.Append("The ChildrenAsProperties property is "
 & p.ChildrenAsProperties.ToString() & "<br>")
    sb.Append("The IsDefaultAttribute method returns "
 & p.IsDefaultAttribute().ToString())
    Message.Text = sb.ToString()

  End Sub
</script>

<html  >
<head id="Head1" runat="server">
    <title>PersistChildrenAttribute</title>
</head>
<body>
    <form id="Form1" runat="server">
    <div>
      <asp:Label ID="Message"
                 runat="server"/>
      <AspSample:CollectionPropertyControl id="CollectionPropertyControl1"
 
                                           runat="server">
        <AspSample:Employee Name="Employee 1" 
                            Title="Title 1" 
                            Alias="Alias 1"
 />
        <AspSample:Employee Name="Employee 2" 
                            Title="Title 2" 
                            Alias="Alias 2"
 />
      </AspSample:CollectionPropertyControl>
    </div>
    </form>
</body>
</html>

<%@ Page Language="C#" Debug="true" %>
<%@ Register TagPrefix="AspSample" Assembly="Samples.AspNet.CS.Controls"
 Namespace="Samples.AspNet.CS.Controls" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

  protected void Page_Load(object sender, EventArgs
 e)
  {
    
    // Verify attribute values.
    ParseChildrenAttribute p = 
      (ParseChildrenAttribute)Attribute.GetCustomAttribute(typeof(CollectionPropertyControl)
,
      typeof(ParseChildrenAttribute));

    StringBuilder sb = new StringBuilder();
    sb.Append("The DefaultProperty property is " + p.DefaultProperty.ToString()
 + "<br>");
    sb.Append("The ChildrenAsProperties property is " + p.ChildrenAsProperties.ToString()
 + "<br>");
    sb.Append("The IsDefaultAttribute method returns " + p.IsDefaultAttribute().ToString());
    Message.Text = sb.ToString();

  }
</script>

<html  >
<head runat="server">
    <title>ParseChildrenAttribute Example</title>
</head>
<body>
    <form runat="server">
    <div>
      <asp:Label ID="Message"
                 runat="server"/>
      <AspSample:CollectionPropertyControl id="CollectionPropertyControl1"
 
                                           runat="server">
        <AspSample:Employee Name="Employee 1" 
                            Title="Title 1" 
                            Alias="Alias 1" />
        <AspSample:Employee Name="Employee 2" 
                            Title="Title 2" 
                            Alias="Alias 2" />
      </AspSample:CollectionPropertyControl>    
    </div>
    </form>
</body>
</html>

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
ParseChildrenAttribute クラス
ParseChildrenAttribute メンバ
System.Web.UI 名前空間
ChildrenAsProperties
Default

ParseChildrenAttribute コンストラクタ

ParseChildrenAttribute クラスの新しいインスタンスを初期化します。
オーバーロードの一覧

名前	説明
ParseChildrenAttribute ()	ParseChildrenAttribute クラスの新しいインスタンスを初期化します。
ParseChildrenAttribute (Boolean)	ChildrenAsProperties プロパティを使用してサーバーコントロール内の要素をサーバーコントロールのプロパティとして解析するかどうかを決定する ParseChildrenAttribute クラスの新しいインスタンスを初期化します。
ParseChildrenAttribute (Type)	ChildControlType プロパティを使用してコントロールとして解析するサーバーコントロール内の要素を決定する ParseChildrenAttribute クラスの新しいインスタンスを初期化します。
ParseChildrenAttribute (Boolean, String)	childrenAsProperties パラメータと defaultProperty パラメータを使用して、ParseChildrenAttribute クラスの新しいインスタンスを初期化します。

参照

ParseChildrenAttribute コンストラクタ ()とは？わかりやすく解説

ParseChildrenAttribute コンストラクタ ()

ParseChildrenAttribute コンストラクタ (Boolean)

ParseChildrenAttribute コンストラクタ (Type)

ParseChildrenAttribute コンストラクタ (Boolean, String)

ParseChildrenAttribute コンストラクタ

関連項目

「ParseChildrenAttribute コンストラクタ ()」の関連用語


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ParseChildrenAttribute コンストラクタ ()とは？ わかりやすく解説

ParseChildrenAttribute コンストラクタ ()

ParseChildrenAttribute コンストラクタ (Boolean)

ParseChildrenAttribute コンストラクタ (Type)

ParseChildrenAttribute コンストラクタ (Boolean, String)

ParseChildrenAttribute コンストラクタ

関連項目

急上昇のことば

「ParseChildrenAttribute コンストラクタ ()」の関連用語

ParseChildrenAttribute コンストラクタ ()とは？わかりやすく解説