ControlValuePropertyAttribute.DefaultValue Properti

Definisi

Ruang nama:

System.Web.UI

Rakitan:

System.Web.dll

Mendapatkan nilai default untuk properti default kontrol.

public:
 property System::Object ^ DefaultValue { System::Object ^ get(); };

public object DefaultValue { get; }

member this.DefaultValue : obj

Public ReadOnly Property DefaultValue As Object

Nilai Properti

Object

Nilai default untuk properti default kontrol.

Contoh

Contoh kode berikut menunjukkan cara mengatur DefaultValue properti dengan menerapkan ControlValuePropertyAttribute atribut ke kontrol kustom.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace Samples.AspNet.CS.Controls
{
    // Set ControlValueProperty attribute to specify the default
    // property of this control that a ControlParameter object 
    // binds to at run time.
    [DefaultProperty("Text")]
    [ControlValueProperty("Text", "Default Text")]
    public class SimpleCustomControl : WebControl
    {
        private string text;

        [Bindable(true)]
        [Category("Appearance")]
        [DefaultValue("")]
        public string Text
        {
            get
            {
                return text;
            }
            set
            {
                text = value;
            }
        }

        protected override void Render(HtmlTextWriter output)
        {
            output.Write(Text);
        }
    }
}

Imports System.ComponentModel
Imports System.Web.UI

Namespace Samples.AspNet.VB.Controls

    ' Set ControlValueProperty attribute to specify the default
    ' property of this control that a ControlParameter object 
    ' binds to at run time.
    <DefaultProperty("Text"), ControlValueProperty("Text", "DefaultText")> Public Class SimpleCustomControl
        Inherits System.Web.UI.WebControls.WebControl

        Dim _text As String

        <Bindable(True), Category("Appearance"), DefaultValue("")> Property [Text]() As String
            Get
                Return _text
            End Get

            Set(ByVal Value As String)
                _text = Value
            End Set
        End Property

        Protected Overrides Sub Render(ByVal output As System.Web.UI.HtmlTextWriter)
            output.Write([Text])
        End Sub

    End Class

End Namespace

Keterangan

Ketika properti yang ditentukan oleh Name properti tidak diatur, gunakan DefaultValue properti untuk menentukan nilai default untuk properti .

Lihat juga

• ControlParameter
• Name