怎样让DATAGRID 里面的修改和删除按钮不能点击

Private Sub dateINvode()

        Dim UpCol As New ButtonColumn
        'Dim usint() As Unit
        'usint1 = Unit(30)
        UpCol.ButtonType = ButtonColumnType.PushButton
        UpCol.CommandName = "Update"
        UpCol.HeaderText = "編輯"
        UpCol.Text = "編輯"
        'UpCol.ItemStyle.Width = New Unit(30)
        DataGrid1.Columns.Add(UpCol)

        Dim deleteCol As New ButtonColumn
        deleteCol.ButtonType = ButtonColumnType.PushButton
        deleteCol.CommandName = "delete"
        deleteCol.HeaderText = "編輯"
        deleteCol.Text = "刪除"
        'deleteCol.Visible = False
        'deleteCol.ItemStyle.Width = 40
        DataGrid1.Columns.Add(deleteCol)

        Dim bcol As New BoundColumn
        bcol.DataField = "STAT_CDC"
        bcol.HeaderText = "ステータス"
        'bcol10.ItemStyle.Width = 0
        bcol.ReadOnly = True
        'bcol10.Visible = False
        DataGrid1.Columns.Add(bcol)

        Dim bcol0 As New BoundColumn
        bcol0.DataField = "BUMON_MEI"
        bcol0.HeaderText = "担当部署"
        'bcol10.ItemStyle.Width = 0
        bcol0.ReadOnly = True
        'bcol10.Visible = False
        DataGrid1.Columns.Add(bcol0)

                Dim bcol4 As New BoundColumn
        bcol4.DataField = "TISIM_MEI"
        bcol4.HeaderText = "施設長名"
        'bcol10.ItemStyle.Width = 0
        bcol4.ReadOnly = True
        'bcol10.Visible = False
        DataGrid1.Columns.Add(bcol4)

        Dim bcol5 As New BoundColumn
        bcol5.DataField = "DISIM_MEI"
        bcol5.HeaderText = "代表医師名"
        'bcol10.ItemStyle.Width = 0
        bcol5.ReadOnly = True
        'bcol10.Visible = False
        DataGrid1.Columns.Add(bcol5)

        Dim bcol6 As New BoundColumn
        bcol6.DataField = "IRAI_SUU"
        bcol6.HeaderText = "依頼例数"
        'bcol10.ItemStyle.Width = 0
        bcol6.ReadOnly = True
        'bcol10.Visible = False
        DataGrid1.Columns.Add(bcol6)        Dim bcol9 As New BoundColumn
        bcol9.DataField = "SBIKOU_BUN"
        bcol9.HeaderText = "備考"
        'bcol10.ItemStyle.Width = 0
        bcol9.ReadOnly = True
        'bcol11.Visible = False
        DataGrid1.Columns.Add(bcol9)

    End Sub

这是我的初始化DATAGRID  从数据库取得数据后会出来"編輯","刪除" 按钮,怎样让这些不能按,可以看到!

望高手指教!