PersistChildrenAttribute Konstruktor

Definisi

Ruang nama:

System.Web.UI

Rakitan:

System.Web.dll

Menginisialisasi instans baru kelas PersistChildrenAttribute.

Overload

PersistChildrenAttribute(Boolean)	Menginisialisasi instans PersistChildrenAttribute baru kelas menggunakan nilai Boolean yang menunjukkan apakah akan mempertahankan konten berlapis sebagai kontrol berlapis.
PersistChildrenAttribute(Boolean, Boolean)	Menginisialisasi instans PersistChildrenAttribute baru kelas menggunakan dua nilai Boolean. Salah satu yang menunjukkan apakah akan mempertahankan konten berlapis sebagai kontrol berlapis dan yang lainnya menunjukkan apakah akan menggunakan metode persistensi kustom.

PersistChildrenAttribute(Boolean)

Menginisialisasi instans PersistChildrenAttribute baru kelas menggunakan nilai Boolean yang menunjukkan apakah akan mempertahankan konten berlapis sebagai kontrol berlapis.

public:
 PersistChildrenAttribute(bool persist);

public PersistChildrenAttribute (bool persist);

new System.Web.UI.PersistChildrenAttribute : bool -> System.Web.UI.PersistChildrenAttribute

Public Sub New (persist As Boolean)

Parameter

persist

Boolean

true untuk mempertahankan konten berlapis sebagai kontrol berlapis; jika tidak, false.

Contoh

Contoh kode berikut menunjukkan cara menerapkan PersistChildrenAttribute atribut untuk kontrol server kustom bernama CollectionPropertyControl.

Contoh kode ini adalah bagian dari contoh yang lebih besar yang disediakan untuk PersistChildrenAttribute kelas .

// Use the PersistChildren attribute to set the Persist
// property to false so that none of this class's
// child controls will be persisted as controls. They will
// be persisted only as child elements of this class.
// If you set the PersistChildren attribute to true, or if you
// do not include this attribute when you create a control,
// the child controls will be persisted as controls.   
[PersistChildren(false)]
[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 = Color.Beige;
      label.ForeColor = 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 = Color.Beige;
      table.ForeColor = 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 PersistChildren attribute to set the Persist
' property to false so that none of this class's
' child controls will be persisted as controls. They will
' be persisted only as child elements of this class.
' If you set the PersistChildren attribute to true, or if you
' do not include this attribute when you create a control,
' the child controls will be persisted as controls.
<PersistChildren(False)>  _
<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
        _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 = Color.Beige
     label.ForeColor = 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 = Color.Beige
     table.ForeColor = 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
End Class

Lihat juga

• Control
• Pengembangan Kontrol Kustom

PersistChildrenAttribute(Boolean, Boolean)

Menginisialisasi instans PersistChildrenAttribute baru kelas menggunakan dua nilai Boolean. Salah satu yang menunjukkan apakah akan mempertahankan konten berlapis sebagai kontrol berlapis dan yang lainnya menunjukkan apakah akan menggunakan metode persistensi kustom.

public:
 PersistChildrenAttribute(bool persist, bool usesCustomPersistence);

public PersistChildrenAttribute (bool persist, bool usesCustomPersistence);

new System.Web.UI.PersistChildrenAttribute : bool * bool -> System.Web.UI.PersistChildrenAttribute

Public Sub New (persist As Boolean, usesCustomPersistence As Boolean)

Parameter

persist

Boolean

true untuk mempertahankan konten berlapis sebagai kontrol berlapis; jika tidak, false.

usesCustomPersistence

Boolean

true untuk menggunakan persistensi yang disesuaikan; jika tidak, false.