ParseChildrenAttribute Constructor (Boolean, String)
Initializes a new instance of the ParseChildrenAttribute class using the childrenAsProperties and defaultProperty parameters.
Assembly: System.Web (in System.Web.dll)
Parameters
- childrenAsProperties
-
Type:
System.Boolean
true to parse the elements as properties of the server control; otherwise, false.
- defaultProperty
-
Type:
System.String
A string that defines a collection property of the server control into which nested content is parsed by default.
If childrenAsProperties is false, the elements are parsed as controls.
The code example in this section contains two parts. The first code example demonstrates how to set properties for the ParseChildrenAttribute class. The second code example demonstrates how to use classes in an ASP.NET page.
The following code example demonstrates how to set the ParseChildrenAttribute object of a custom server control named CollectionPropertyControl. The ParseChildrenAttribute sets the ChildrenAsProperties property to true and the DefaultProperty property to the Employee 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 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
The following code example demonstrates how to use the CollectionPropertyControl and Employee classes in an ASP.NET page.
<%@ 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 xmlns="http://www.w3.org/1999/xhtml" > <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>
Available since 1.1