自己做了个小控件玩一下，结果实现了IPostBackDataHandler接口所要的方法还是出错

代码如下，已经实现了IPostBackDataHandler所要的方法还是提示必须为IPostBackDataHandler实现xxxx方法，不懂那里出问题了．．．．．．．．

Imports System
Imports System.Collections.Specialized
Imports System.Text
Imports System.Web
Imports System.Web.UI

Namespace LU.TextBox
    Public Class MyTextBox
        Inherits System.Web.UI.Control
        Implements IPostBackDataHandler

        Private _Text As String
        Public Property Text() As String
            Get
                Return _Text
            End Get
            Set(ByVal value As String)
                _Text = value
            End Set
        End Property

        '重写呈现HTML的方法
        Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter)
            Dim builder As New StringBuilder()
            builder.Append("<input type=text name=" & Me.UniqueID & " value=" & HttpUtility.HtmlEncode(Text) & "/>")
            writer.Write(builder.ToString())
        End Sub

        Public Overridable Function LoadPostData(ByVal postDataKey As String, ByVal postCollection As NameValueCollection) As Boolean
            Dim oldValue As String = Text
            Dim newValue As String = postCollection(Me.UniqueID)
            If oldValue Is Nothing Or Not oldValue.Equals(newValue) Then
                Text = newValue
                Return True
            End If
            Return False
        End Function

        Public Overridable Sub RaisePostDataChangedEvent()
            OntextChanged(EventArgs.Empty)
        End Sub

        '申明事件TextChanged并指定与之匹配的委托EventHandler
        Public Event TextChanged As EventHandler

        Protected Overridable Sub OntextChanged(ByVal e As EventArgs)
            '注册事件
            AddHandler Me.TextChanged, AddressOf Work
            '引发事件
            RaiseEvent TextChanged(Me, e)
        End Sub

        Protected Sub Work(ByVal Send As Object, ByVal e As System.EventArgs)
            HttpContext.Current.Response.Write("<script language='javascript'>alert('不要,不要');</script>")
        End Sub

    End Class
End Namespace --------------------编程问答-------------------- 忘了给分，明天加分 --------------------编程问答-------------------- 问题解决，原来语法和C#不太一样的

补充：.NET技术 ,  ASP.NET