图片的显示和存储

         这几天一直在搞一个，图片的存储和显示的小系统，但是进展很小，图片存储在SQL SERVER 中，现在要完成的是,上传——存储——显示
         主要代码如下：
        connection = New SqlConnection("Server=ripple;Uid=sa;Pwd=11;database=ww")
        Dim sql1 As String = "select photo from person where name='" & name & "'"
        command = New SqlCommand(sql1, connection)
        connection.Open()
        datareader = command.ExecuteReader()
        While (datareader.Read)
            Dim byt() As Byte
             Try
                Dim o As Object = datareader("photo")
                            If o Is Nothing Then
                Else
                    byt = o
                End If
            Catch ex As Exception
                MsgBox(ex.Message)
            End Try
            Dim ms As MemoryStream
                        Dim bm As Bitmap
            Try
                ms = New MemoryStream(byt)
                bm = New Bitmap(ms)             ‘出错“无效参数”
            Catch ex As Exception
                If Not ms Is Nothing Then ms.Close()
            Finally
                If Not ms Is Nothing Then ms.Close()
            End Try
            If bm Is Nothing Then
            Else
                Me.UltraPictureBox1.Image = bm
                Me.UltraPictureBox1.Refresh()
                'ms.Close()
            End If
        End While
        datareader.Close()
        connection.Close()


请高手帮忙！谢谢！！