Hyperlink Column in ASP.NET

By default, hyperlink column doesn't allow using Javascript. For this, I inherited from BoundField to have more control.

Public Class HyperlinkBoundField
    Inherits BoundField
    Public NavigateUrlFormatString As String
    Public NoLinkValue As String

    Public Sub New()
        MyBase.New()
    End Sub

    Public Sub New(ByVal field As BoundField, ByVal noLinkValue As String, ByVal urlFormat As String)
        Me.DataField = field.DataField
        Me.HeaderText = field.HeaderText
        Me.HeaderImageUrl = field.HeaderImageUrl
        Me.SortExpression = field.SortExpression
        Me.NoLinkValue = noLinkValue
        Me.NavigateUrlFormatString = urlFormat
    End Sub

    Protected Overrides Function FormatDataValue(ByVal dataValue As Object, ByVal encode As Boolean) As String
        Dim value As String = MyBase.FormatDataValue(dataValue, encode)
        If String.IsNullOrEmpty(value) OrElse value = NoLinkValue Then
            Return value
        Else
            Return String.Format(NavigateUrlFormatString, value)
        End If
    End Function
End Class