c# 打印方法(如何打印)

using System.Drawing.Printing;

using System.Drawing.Drawing2D;

PaperSize psize;
private void toolStripButton7_Click(object sender, EventArgs e) //列印
{
    printDialog1.Document = printPreviewControl1.Document;
    DialogResult result = printDialog1.ShowDialog();
    if (result == DialogResult.OK)
    {
        printDialog1.Document.DefaultPageSettings.PaperSize = psize;
        printDialog1.Document.Print();
    }
}