Update Record in Sql Table

Public Property StudentPhoto() As Object
        Get
            Return _StudentPhoto
        End Get
        Set(ByVal value As Object)
            If IsDBNull(value) = True Then
                _StudentPhoto = value
                _PhotoPath = ""
            Else
                If value.GetType.Name = "String" Then
                    _PhotoPath = System.Web.HttpContext.Current.ApplicationInstance.Server.MapPath(value.ToString)
                    Dim st As New System.IO.FileStream(_PhotoPath, System.IO.FileMode.Open, System.IO.FileAccess.Read)
                    Dim mbr As System.IO.BinaryReader = New IO.BinaryReader(st)
                    Dim buffer(st.Length) As Byte
                    mbr.Read(buffer, 0, CInt(st.Length))
                    _StudentPhoto = buffer
                Else
                    _StudentPhoto = value
                    Dim arrPhoto() As Byte = CType(_StudentPhoto, Byte())
                    _StudentPhoto = arrPhoto
                    Dim stPhote As New IO.MemoryStream(arrPhoto)
                    _PhotoPath = "/PhotoUpload/" & _PhotoID & ".jpeg"
                    Try
                        Dim imgPhoto As Image = Image.FromStream(stPhote)
                        imgPhoto.Save(System.Web.HttpContext.Current.ApplicationInstance.Server.MapPath(_PhotoPath), Imaging.ImageFormat.Jpeg)
                        _PhotoPath = "~" & _PhotoPath
                    Catch ex As Exception
                        _StudentPhoto = DBNull.Value
                        _PhotoPath = ""
                    End Try
                End If
            End If
        End Set
    End Property

Dim Recordid As Integer = objStudentConvo.GetStudentConvoRecordID(Session("UserMailID"))
      If upimgphoto.ImageUrl = "~/PhotoUpload/New/Blank.jpg" Then
          objStudentPhotocls.StudentPhoto = DBNull.Value
      Else
          objStudentPhotocls.StudentPhoto = upimgphoto.ImageUrl
      End If
      objStudentPhotocls.ConvoID = objStudentConvo.ConvoID
      objStudentPhotocls.RecordID = Recordid