class1.vb

對c#初學者參考..為課題asp.net 2.0教材代碼

Imports System.ComponentModel
Imports System.Web.UI

<DefaultProperty("Text")> _
<ToolboxData("<{0}:WebCustomControl3 runat=server></{0}:WebCustomControl3>")> _
Public Class WebCustomControl3
    Inherits System.Web.UI.WebControls.WebControl
    Implements IPostBackEventHandler, IPostBackDataHandler

    Dim _text As String

    <Bindable(True), Category("Appearance"), Themeable(False), 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)
        Dim p As New PostBackOptions(Me)

        output.AddAttribute(HtmlTextWriterAttribute.Onclick, _
            Page.ClientScript.GetPostBackEventReference(p))

        output.AddAttribute(HtmlTextWriterAttribute.Value, "My Button")
        output.AddAttribute(HtmlTextWriterAttribute.Id, Me.ClientID)
        output.AddAttribute(HtmlTextWriterAttribute.Name, Me.ClientID)
        output.RenderBeginTag(HtmlTextWriterTag.Button)
        output.RenderEndTag()
    End Sub

    Public Event Click()
    Public Sub OnClick(ByVal args As EventArgs)
        RaiseEvent Click()
    End Sub

    Public Sub RaisePostBackEvent(ByVal eventArgument As String) Implements System.Web.UI.IPostBackEventHandler.RaisePostBackEvent
        OnClick(EventArgs.Empty)
    End Sub

    Public Function LoadPostData(ByVal postDataKey As String, _
            ByVal postCollection As _
                System.Collections.Specialized.NameValueCollection) _
            As Boolean Implements System.Web.UI.IPostBackDataHandler.LoadPostData
        Me.Text = postCollection(postDataKey)
        Return False
    End Function

    Public Sub RaisePostDataChangedEvent() Implements System.Web.UI.IPostBackDataHandler.RaisePostDataChangedEvent

    End Sub


End Class