WPF SDK研究 Printing (1) PrintDialog

PrintDialog
    This sample illustrates how to create an instance of a simple PrintDialog and then display it. The sample uses both Extensible Application Markup Language (XAML) and procedural code. 
    使用PrintDialog显示打印机设置(ShowDialog方法)，以及可打印区域的width/height：

    3个按钮对应的function如下:

        public void InvokePrint(object sender, RoutedEventArgs e)
            {
                PrintDialog pDialog = new PrintDialog();
                pDialog.PageRangeSelection = PageRangeSelection.AllPages;
                pDialog.UserPageRangeEnabled = true;
                pDialog.ShowDialog();
            }
        public void GetHeight(object sender, RoutedEventArgs e)
        {
            PrintDialog pDialog = new PrintDialog();
            PrintTicket pt = pDialog.PrintTicket;   //force initialization of the dialog's PrintTicket or PrintQueue
            txt1.Text = pDialog.PrintableAreaHeight.ToString() + " is the printable height";
        }
        public void GetWidth(object sender, RoutedEventArgs e)
        {
            PrintDialog pDialog = new PrintDialog();
            PrintQueue pq = pDialog.PrintQueue;     //force initialization of the dialog's PrintTicket or PrintQueue
            txt2.Text = pDialog.PrintableAreaWidth.ToString() + " is the printable width";
        }

对于PrintDialog，大家并不陌生。而PrintQueue和PrintTicket则是NET3.5新增的两个类。在这个Sample中，这两个类并没有起到任何作用，甚至可以mark掉。