ControlValuePropertyAttribute 构造函数

public:
 ControlValuePropertyAttribute(System::String ^ name);

public ControlValuePropertyAttribute (string name);

new System.Web.UI.ControlValuePropertyAttribute : string -> System.Web.UI.ControlValuePropertyAttribute

Public Sub New (name As String)

参数

示例

下面的代码示例演示如何将指定 ControlValuePropertyAttribute 默认属性的属性应用于自定义控件。 此构造函数通过 ASP.NET 在内部调用，以创建表示ControlValuePropertyAttribute属性的对象。

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")]
    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")> 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

注解

使用此构造函数可以使用指定的属性名称创建类的新实例 ControlValuePropertyAttribute 。 下表显示了类实例 ControlValuePropertyAttribute 的初始属性值。

另请参阅

• Name

public:
 ControlValuePropertyAttribute(System::String ^ name, System::Object ^ defaultValue);

public ControlValuePropertyAttribute (string name, object defaultValue);

new System.Web.UI.ControlValuePropertyAttribute : string * obj -> System.Web.UI.ControlValuePropertyAttribute

Public Sub New (name As String, defaultValue As Object)

参数

示例

下面的代码示例演示如何将指定 ControlValuePropertyAttribute 默认属性和值的属性应用于自定义控件。 此构造函数通过 ASP.NET 在内部调用，以创建表示ControlValuePropertyAttribute属性的对象。

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

注解

使用此构造函数可以使用指定的属性名称和默认值创建类的新实例 ControlValuePropertyAttribute 。 下表显示了 ControlValuePropertyAttribute 类的某个实例的初始属性值。

另请参阅

• Name
• DefaultValue

public:
 ControlValuePropertyAttribute(System::String ^ name, Type ^ type, System::String ^ defaultValue);

public ControlValuePropertyAttribute (string name, Type type, string defaultValue);

new System.Web.UI.ControlValuePropertyAttribute : string * Type * string -> System.Web.UI.ControlValuePropertyAttribute

Public Sub New (name As String, type As Type, defaultValue As String)

参数

注解

使用此构造函数可以使用指定的属性名称和默认值创建类的新实例 ControlValuePropertyAttribute 。 此版本的构造函数还尝试将默认值转换为参数指定的 type 数据类型。 如果无法转换默认值，则 DefaultValue 不会设置该属性。 下表显示了 ControlValuePropertyAttribute 类的某个实例的初始属性值。

另请参阅

• Type
• Name
• DefaultValue