Private Sub btn_addnew_Click(sender As Object, e As EventArgs) Handles btn_addnew.Click
        If txt_add_numroom.Text = "" Or txt_add_price.Text = "" Or txt_add_name.Text = "" Or txt_add_tell.Text = "" Or txt_add_address.Text = "" Or txt_add_code.Text = "" Then
            msg_error("กรอกข้อมูลให้ครบ")
            Return

        End If
        If Not IsNumeric(txt_add_price.Text) Then
            msg_error("กรอกราคาเป็นตัวเลขเท่านั้น")
            Return
        End If

        If pic_add.Image Is Nothing Then
            Getroom = "insert into renter(renter_numroom,renter_name,renter_tell,renter_address,renter_code,renter_price) values(@numroom,@name,@tell,@address,@code,@price)"
        Else
            Getroom = "insert into renter(renter_numroom,renter_name,renter_tell,renter_address,renter_code,renter_price,renter_image) values(@numroom,@name,@tell,@address,@code,@price,@img)"
        End If

        cmd = New OleDb.OleDbCommand(Getroom, cn)
        cmd.Parameters.Clear()
        cmd.Parameters.AddWithValue("numroom", txt_add_numroom.Text)
        cmd.Parameters.AddWithValue("name", txt_add_name.Text)
        cmd.Parameters.AddWithValue("tell", txt_add_tell.Text)
        cmd.Parameters.AddWithValue("address", txt_add_address.Text)
        cmd.Parameters.AddWithValue("code", txt_add_code.Text)
        cmd.Parameters.AddWithValue("price", txt_add_price.Text)
        If Not pic_add.Image Is Nothing Then
            Dim mem As New IO.MemoryStream
            pic_add.Image.Save(mem, Imaging.ImageFormat.Bmp)
            Dim pic_for_add() As Byte
            pic_for_add = mem.ToArray()
            cmd.Parameters.AddWithValue("img", pic_for_add)

        End If

        If cmd.ExecuteNonQuery = 0 Then                         โปรแกรมชี้ error ตรงนี้คับ
            msg_error("เพิ่มไม่สำเร็จ")
        Else
            msg_ok("เพิ่มสำเร็จ")
        End If

    End Sub

    Private Sub btn_select_picture_Click(sender As Object, e As EventArgs) Handles btn_select_picture.Click
        If openfile_renter.ShowDialog = Windows.Forms.DialogResult.OK Then
            Dim img As Image
            img = Image.FromFile(openfile_renter.FileName)
            pic_add.Image = img
        End If
    End Sub
End Class